Best Table Grapes to Grow in Australia: Top Varieties

The best table grapes for most Australian home gardens are Flame Seedless, Crimson Seedless and Thompson Seedless (Sultana). Flame Seedless handles heat well, ripens early and is easy to find at nurseries. Crimson Seedless gives you that classic bright-red, long-keeping berry through mid-to-late season. Thompson Seedless is the workhorse, seedless, green, reliable in warm inland climates and dual-purpose if you want to dry a few bunches. Which of those three (or a combination) suits you comes down to where you live and what your summer actually looks like. For readers outside Australia, region-specific recommendations are available for places such as North Carolina, see best table grapes to grow in North Carolina for suitable cultivars and local growing tips.

Quick recommendations for common garden situations

Before diving into full cultivar profiles and state-by-state guidance, here is a plain-language summary for the most common backyard situations. Grapes are flexible plants, but the wrong variety in the wrong spot will frustrate you. Match the cultivar to your conditions first and everything else gets easier.

Will grapes grow in my state?

Yes, grapes will grow in every Australian state and territory. But 'grow' and 'produce a satisfying crop reliably' are different things. Here is an honest breakdown by state and territory.

New South Wales

NSW is one of the best states for home table-grape growing in Australia. The inland and Murray Valley regions (Griffith, Mildura fringe, Broken Hill surrounds) give you the hot, dry summers and cool winters that grapes love. Coastal and Hunter Valley areas work well too, though humidity lifts disease pressure, powdery mildew and downy mildew are real issues from Newcastle north. Choose disease-tolerant cultivars, keep your canopy open and be ready with a spray programme. Sydney's western suburbs are excellent grape country.

Victoria

Victoria is arguably the heartland of Australian table-grape production. The Sunraysia / Murray Valley region around Mildura and Robinvale is where the bulk of commercial grapes are grown, and those same conditions work perfectly at home scale. Melbourne and surrounds have a temperate climate that suits most cultivars. The Yarra Valley, Dandenong Ranges and alpine northeast are cooler, stick to early-ripening seedless varieties and watch for late frosts in spring.

Queensland

Queensland is the most challenging state for table grapes due to high humidity, Queensland Fruit Fly (Qfly) pressure and mild winters in the southeast that can reduce dormancy. Grapes do grow, but they need a genuine winter chill (ideally 200+ hours below 7°C) to break dormancy properly. The Granite Belt at 800-1000m elevation is Queensland's most reliable grape region. Coastal Brisbane and surrounds can produce grapes but expect significant disease management effort and inconsistent yields. Flame Seedless and Autumn Royal are your best bets in subtropical coastal zones.

South Australia

South Australia has a Mediterranean-style climate across most of the state, which is near-ideal for table grapes. Adelaide, the Barossa and McLaren Vale fringes, the Riverland and Clare Valley areas all produce good home crops. Dry summers keep disease pressure low. Salinity can be a challenge in some Riverland soils, if that applies to your block, select a drought- and salt-tolerant rootstock like 1103 Paulsen.

Western Australia

The Swan Valley just outside Perth has grown table grapes commercially for over a century. Perth's warm, dry Mediterranean climate is excellent. The southwest, Margaret River, Great Southern, is cooler and suits wine-style viticulture more, but you can still grow early-ripening table cultivars. The Kimberley and Pilbara are too hot and tropical for reliable dormancy. Stick to the southwest corner and you will have few complaints.

Tasmania

Tasmania is the coolest grape-growing region in Australia. Grapes do grow and ripen in the warmer northeast and east coast (around Swansea, Bicheno and the Tamar Valley), but you will need to choose early-ripening varieties and give your vines the warmest, most sheltered north-facing spot available. Thompson Seedless can struggle to fully ripen in cooler Tasmanian sites; Muscat Hamburg and Concord types are more forgiving. Hobart and the southwest get marginal results at best.

Northern Territory

The NT is difficult. Darwin's wet-dry tropical climate lacks meaningful winter chilling and has extreme wet-season humidity, grapes will not perform reliably there. Alice Springs is more interesting: it has a genuine cool winter and hot summer with low humidity, and some growers have produced table grapes there successfully. If you are in Alice Springs or a similarly arid-zone NT location, Menindee Seedless and Thompson Seedless are worth trialling. Expect to manage irrigation carefully as rainfall is scarce and unpredictable.

ACT

The ACT's cool continental climate and cold winters are actually good news for dormancy and bud set. Spring frosts are the main risk, Canberra regularly sees frosts into October, which can devastate newly burst buds. Protect vines with frost cloth or position them against a north-facing wall or fence to gain radiated warmth. Early to mid-season varieties (Flame Seedless, Thompson Seedless) ripen reliably in most ACT summers. Late-season cultivars like Crimson Seedless can struggle to finish properly in shorter ACT seasons.

Climate-zone overview and cultivar selection

Australia spans five broad climate zones relevant to grape growing. Your zone determines which cultivars ripen properly, how much irrigation you will need, what diseases you will encounter most and how aggressive your frost management needs to be. If you're gardening in Arkansas, consult best table grapes to grow in Arkansas for region-specific cultivar recommendations.

Temperate (southeast coast, ACT, elevated inland)

Warm summers, cool-to-cold winters and moderate rainfall. This zone suits a wide range of cultivars. Disease pressure is moderate, and good canopy management keeps it in check. Crimson Seedless, Flame Seedless and Thompson Seedless all perform well. Growing-season length is typically 180-210 days from budburst to harvest.

Mediterranean (most of SA, southwest WA, inland VIC)

Hot, dry summers and mild winters, the classic wine and table-grape climate. Disease pressure is low because humidity stays down during ripening. Almost every cultivar in this article will succeed in a Mediterranean-climate garden. Growing seasons run 190-220 days. This is the easiest zone to grow table grapes in Australia.

Subtropical (coastal QLD, northern NSW)

Warm winters reduce chilling hours, and summer humidity pushes disease pressure up significantly. Choose earlier-ripening, relatively disease-tolerant cultivars. Qfly is a persistent pest in this zone and needs active management (exclusion bags, bait stations). Growing-season length can actually be longer (210-240 days) because winter dormancy is shorter or incomplete, but fruit quality is more variable.

Arid / semi-arid (inland NSW, Sunraysia, Alice Springs, Riverland)

Hot, dry summers and cold winters. Low disease pressure is the big advantage. The challenge is irrigation, vines need consistent water in the absence of rain. Menindee Seedless and Thompson Seedless were selected for exactly this environment. Rootstock choice matters here: Ramsey and 1103 Paulsen cope best with sandy, saline or low-fertility arid soils.

Alpine / cool elevated (TAS, alpine VIC/NSW, ACT hills)

Short growing seasons, late spring frosts and cool ripening conditions. Early-ripening cultivars are non-negotiable. Site selection within your property matters enormously, a north-facing slope or a wall-trained vine will give you weeks more ripening time than an open flat site. Growing-season length in the coolest sites may be as short as 150-170 days.

Seedless vs seeded table grapes, which should you choose?

For most home gardeners, seedless is the right default. If you need region-specific advice, see a short guide to the best seedless grapes to grow in Georgia for climate-tailored recommendations. Seedless cultivars like Flame Seedless, Crimson Seedless and Thompson Seedless dominate Australian nursery offerings for good reason, fresh eating convenience, no complaints from kids and good yields from manageable vines. They also dominate commercial production: Crimson Seedless alone accounted for around 41% of Murray Valley production in recent industry assessments.

That said, seeded cultivars earn their place in a home garden for specific reasons. Red Globe (large, crimson-red berries) produces an impressive-looking cluster with a distinct crunch that seedless types rarely match. Muscat Hamburg delivers an intense, aromatic flavour that fans of muscat-style grapes find irreplaceable. Albany Surprise, a heritage seeded variety, ripens early and tolerates cooler, wetter conditions better than most seedless cultivars, making it genuinely useful in Tasmania or the ACT.

If you are just starting out, begin with one seedless and one seeded cultivar side by side. You will quickly learn which style suits your climate and your household's preferences. If your primary interest is purely flavour complexity and you are in a Mediterranean or temperate climate, consider adding Muscat Hamburg even though it is seeded, the flavour difference is remarkable.

Top cultivars for Australian home gardeners at a glance

These are the cultivars I would plant first, or recommend first to a friend setting up a backyard vineyard anywhere in Australia. The list is deliberately short. You can always add more varieties once you have a season or two under your belt.

1. Flame Seedless — early, red, seedless, heat-tolerant, easiest to find at Australian nurseries
2. Crimson Seedless — mid-to-late, bright red, seedless, excellent shelf life, high yields
3. Thompson Seedless (Sultana) — mid-season, green/golden, seedless, dual-purpose (fresh and drying), excellent inland performance
4. Menindee Seedless — very early, white/green, seedless, ideal for hot dry regions and early-season harvests
5. Autumn Royal — late, large, black, seedless, extends your harvest into autumn
6. Red Globe — mid-season, large, red, seeded, outstanding for fresh presentation and flavour
7. Muscat Hamburg — mid-season, dark red/black, seeded, intense muscat flavour, best in Mediterranean and temperate zones

Cultivar comparison at a glance

Detailed cultivar profiles

Flame Seedless

Flame Seedless is the variety I recommend most often to beginners, and it earns that spot because it almost always delivers. The berries are small to medium, bright red and crisp with a sweet, lightly tart flavour. It ripens early, typically December to January in most temperate and Mediterranean Australian gardens, which means you are harvesting before the worst of summer heat, before Queensland Fruit Fly populations peak in many areas, and before competing autumn demands on your time. It is widely available at Bunnings, Daleys and most local nurseries as a bare-root vine in winter. Disease susceptibility is moderate, meaning you will need a basic preventive spray programme for powdery mildew, but it is not a nightmare to manage. Flame Seedless works well on a backyard pergola or single-wire trellis and responds well to spur pruning.

Crimson Seedless

Crimson Seedless is the heavyweight of the Australian table-grape market, it accounts for around 41% of Murray Valley commercial production and that popularity is well-earned. The berries are larger than Flame, a vivid bright red-crimson, with a firm texture and mild sweet flavour. Shelf life after harvest is excellent, which matters at home scale when you cannot eat 5 kg of grapes in a day. It ripens mid-to-late season (February to March), which means you need adequate growing-season length, it can underperform in the ACT or alpine zones where seasons are short. In warm temperate, Mediterranean and arid climates it is outstanding. For best berry size, some growers apply girdling (notching the bark) or gibberellin at flowering, though for home use you can skip this and still get a good crop.

Thompson Seedless (Sultana)

Thompson Seedless, known in Australia as Sultana, is the most historically important table and dried grape cultivar in the country. It is a mid-season ripener (January to February) with small, oval, green-to-golden berries and thin, almost translucent skin. The flavour is sweetly mild rather than complex, and the texture is soft, exactly what most people mean when they picture a sultana grape. In inland and arid regions it thrives with minimal disease pressure. In humid coastal gardens it needs more attentive management. Its dual purpose (fresh eating or drying for sultanas) makes it especially appealing if you have a large vine and more fruit than you can eat fresh. It responds well to cane pruning and vigorous trellis management.

Menindee Seedless

Menindee Seedless was developed and adopted specifically for hot, dry Australian inland conditions, primarily Sunraysia and inland NSW, and it shows. It is a very early cultivar, often ripening in November to December before most other varieties have even reached veraison. The berries are medium-sized, white to light amber, with a mild sweetness. For hot-climate gardeners who want to start harvesting while summer is still building, Menindee is your answer. Its disease pressure in dry inland conditions is generally low. In humid zones it is less well-suited and harder to justify over Flame Seedless. It is a useful pick for container growing too, given its early harvest window and manageable vigour.

Autumn Royal

Autumn Royal fills a gap that most other cultivars leave open: the late-season harvest window. It ripens March to April, well after Flame and Crimson have finished, extending your fresh table-grape season into autumn with large, oval, near-black seedless berries. Flavour is pleasantly sweet and mild. The main risk is Botrytis bunch rot as autumn nights cool and humidity occasionally rises; keeping bunches well-thinned and canopy open is essential. In temperate and Mediterranean climates Autumn Royal performs well. In subtropical zones it can work but autumn rains will challenge you.

Red Globe

Red Globe is the one seeded cultivar I consistently see home gardeners fall in love with, mostly because the clusters look extraordinary, large round berries, deep red, with a satisfying crunch that seedless types do not replicate. It is a mid-season cultivar (January to February) with a sweet-tart flavour and thick skin that holds up well. The seeds are large enough that some people find them off-putting, but fans of Red Globe will tell you the flavour complexity makes up for it. Disease susceptibility is moderate and similar to Crimson Seedless. It performs best in Mediterranean, temperate and arid climates. It remains commercially grown in Australia for domestic markets and export, though seedless cultivars have taken over the bulk of production.

Muscat Hamburg

If flavour intensity is your priority and you are happy to manage seeds, Muscat Hamburg is in a category of its own among home-garden table grapes. The berries are dark red to near-black, medium-sized and seeded, with an unmistakable floral, muscat-spiced richness that makes commercial seedless grapes taste flat by comparison. It ripens mid-season in Mediterranean and temperate climates. The downside is that it is genuinely susceptible to powdery mildew, so you will need a regular preventive spray programme. Give it a warm, airy position and stay on top of spraying and it rewards you with something you simply cannot buy at a supermarket.

Regional planting calendar and growing-season length

The table below gives you practical timing benchmarks for each state and climate zone. Dates are approximate and based on Bureau of Meteorology climate normals and established viticultural growing-degree-day research. The Bureau of Meteorology – climate data and station observations (Climate data portal) provides climate normals, frost records and station temperature data that underpin regional planting windows and growing season length assessments used by Australian viticulture researchers and extension services. Your microclimate (a warm north-facing slope versus a frost-prone valley floor) can shift these windows by two to four weeks.

A few things worth noting from this calendar. In the Murray Valley, Sunraysia and South Australian Riverland, the combination of a long growing season and low humidity gives you the most flexibility in cultivar selection, virtually anything in the list above will ripen. According to the Table grape marketing snapshot / Hort Innovation, Australia’s table‑grape production is highly concentrated in the Murray Valley and Sunraysia regions, which supply the bulk of domestic and export table grapes. In Tasmania and the ACT, prioritise early-ripening cultivars (Flame Seedless, Menindee Seedless) and avoid late-season types like Autumn Royal unless you are on a warm, sheltered site. Coastal subtropical Queensland may look like it has a long season on paper, but chilling hours can be marginal and disease pressure is high, so effective days for quality ripening are fewer than the calendar suggests.

Site selection, soil and trellis

Site selection

Grapes want full sun, at least six hours of direct sunlight per day, and more is better. A north-facing fence or wall is the single best position in most Australian backyards. It captures winter sun for cane ripening, stores heat in masonry that protects against light frosts, and promotes even spring warming. Avoid frost pockets (low-lying areas where cold air settles), shaded positions under large trees and spots with poor air circulation. Good airflow through and around the vine is one of your best passive disease-prevention tools.

Soil

Grapes are tolerant of a wide range of soils but insist on good drainage. Waterlogged roots for more than a few days will cause significant damage. Sandy loam to clay loam with a pH of 6.0 to 7.5 is ideal. If your soil is heavy clay, raise the planting bed 20-30 cm and incorporate compost and coarse sand. If you are in a saline Riverland-style environment, rootstock selection (1103 Paulsen or 140 Ruggeri) will help far more than soil amendments alone.

Trellis systems for home gardens

The three most practical trellis options for home gardeners are the single-wire cordon, the pergola/overhead and the VSP (Vertical Shoot Positioning) trellis.

• Single-wire cordon (1.0–1.2 m high): Simple, cheap and easy to manage. Good for small gardens. Suits spur-pruned cultivars like Flame Seedless and Crimson Seedless. Prune to two-bud spurs each winter.
• VSP trellis (two to three wires, 0.6–1.5 m high): The most productive option for serious home growers. Shoots are trained upward between foliage wires, improving airflow and sun exposure. Suits cane-pruned cultivars like Thompson Seedless.
• Pergola/overhead: Attractive, provides shade and allows fruit to hang naturally. Disease management is harder because airflow is limited and spraying overhead is awkward. Best suited to dryer Mediterranean and arid climates where mildew pressure is lower.

Rootstock selection

Most home gardeners buy own-rooted vines (no rootstock) and these work perfectly well if phylloxera is not present in your area and your soil is suitable. However, if you are in a phylloxera-risk zone (check with your state agriculture department), on sandy or nematode-prone soils, or in a saline or droughted environment, a grafted vine on a compatible rootstock is worth the extra cost.

• Ramsey: Very vigorous, excellent nematode tolerance, well-suited to sandy arid soils in Sunraysia-type environments. Can over-invigorate scion varieties if soil is too fertile.
• 1103 Paulsen: Strong drought and salinity tolerance, good nematode resistance, used widely in Riverland and arid SA. Moderate vigour — easier to manage than Ramsey.
• 140 Ruggeri: Good drought tolerance and moderate phylloxera resistance, suits drier sites. Slightly lower vigour than 1103 Paulsen.
• Certified/virus-tested material: Source grafted vines from accredited suppliers such as the Victorian and Murray Valley Vine Improvement Association (VAMVVIA) or Australian Vine Improvement Association (AVIA) where possible — virus-infected planting material is a long-term productivity problem that is very difficult to reverse.

Seasonal care, what to do and when

Winter (June–August): Pruning and planting

Winter dormancy is your main work window. Prune once vines are fully dormant, usually June to July in most Australian climates. For spur-pruned varieties (Flame Seedless, Crimson Seedless), cut each spur back to two healthy buds. For cane-pruned varieties (Thompson Seedless), select one or two vigorous canes from the previous season's growth and tie them to the trellis wire, removing all others. This is also the time to plant bare-root vines. Dig a planting hole 40 cm deep and 40 cm wide, incorporate compost, plant the vine at the original soil level and water in well. Apply a balanced fertiliser (e.g. 8-8-8 or similar NPK) at planting.

Spring (September–November): Budburst, shoot management and first disease sprays

Budburst is exciting but it is also when your vigilance needs to start. Begin your preventive fungicide programme at budburst, even before symptoms appear, targeting powdery mildew and downy mildew. Remove any shoots growing in the wrong direction (toward the fence, downward into the soil, from below the graft union). When shoots are 15-20 cm long, begin training them upward through foliage wires if using a VSP system. Watch for spring frosts, even in Melbourne and Sydney, a late September or October frost can burn new growth. Have frost cloth or shade cloth ready to drape over vines overnight if a frost warning is issued.

Summer (December–February): Irrigation, shoot tucking and harvest

Deep, infrequent watering is better than daily light watering. In hot inland conditions (35°C+ days), established vines may need 15-20 litres per vine per week during summer. Drip irrigation is ideal, it keeps foliage dry (reducing disease pressure) and delivers water directly to the root zone. Continue fungicide applications every 10-14 days or per label directions through flowering and bunch development. Remove lateral shoots that shade the fruit zone. Harvest when berries reach full colour, detach easily from the bunch stem and taste sweet with no green astringency.

Autumn (March–May): Post-harvest care and vine preparation

After harvest, allow the vine to continue photosynthesising until leaves begin to yellow and drop naturally, this builds carbohydrate reserves in the canes for next season. Apply a potassium-rich fertiliser after harvest to assist ripening of the current season's canes. Remove any fallen leaves and spent bunches from under the vine to reduce overwintering disease inoculum. Once leaves have dropped fully, you can begin dormant pruning.

Pests and diseases, what you will actually deal with

Powdery mildew (Erysiphe necator)

This is the number-one fungal disease for home table-grape growers across most of Australia. It appears as a white-grey powdery coating on leaves, shoots and berries and is worst in warm-to-hot conditions with low humidity, which means Mediterranean and temperate Australian summers are actually quite suitable for it, despite the lack of rain. Preventive management is far more effective than trying to cure an established infection. Non-chemical options include wettable sulfur sprays (effective and low-residue) and potassium bicarbonate. Chemical options (if you choose to use them) include trifloxystrobin and tebuconazole. Rotate modes of action to prevent resistance. Good canopy management that keeps airflow through the bunch zone is your best non-chemical tool.

Downy mildew (Plasmopara viticola)

Downy mildew needs free moisture on leaves to infect. It is most relevant in humid subtropical zones (coastal QLD, northern NSW), temperate zones during wet springs and on pergola systems with restricted airflow. Symptoms are yellow-green 'oil spots' on the upper leaf surface with a white, downy sporulation on the underside. Copper-based sprays (copper oxychloride, copper hydroxide) are the foundation of non-chemical and approved organic management. Chemical protectants include mancozeb-based products. Avoid overhead irrigation, ensure good canopy ventilation and spray before rain events when conditions are favourable.

Botrytis bunch rot (Botrytis cinerea)

Botrytis attacks ripe and ripening berries, especially in cool and moist harvest-time conditions. Tight-clustered bunches are most vulnerable. The best non-chemical approach is bunch thinning (remove excess berries or secondary clusters at fruit set to reduce bunch density) and leaf removal around the fruit zone to improve airflow. Avoid overhead watering once fruit has set. Chemical options (iprodione, fenhexamid) are available but resistance is documented, use them only as part of an integrated programme, not as a sole reliance.

Queensland Fruit Fly (Qfly)

Qfly is a serious pest in eastern and northern Australia. Female flies lay eggs in ripening berries; larvae then feed inside the fruit and cause it to collapse and rot. This is a pest that genuinely requires active management in affected zones, passive tolerance does not work. Practical options for home gardeners include exclusion netting or individual bunch bags (fine mesh or paper), protein bait stations (Naturalure or similar) placed around the garden, and monitoring traps to track fly activity. Early-ripening cultivars (Flame Seedless, Menindee Seedless) can sometimes escape the worst Qfly pressure by finishing before peak fly populations build.

Vine mealybug and other pests

Vine mealybug (primarily Planococcus ficus) colonises under bark and in the bunch zone, excreting honeydew that promotes sooty mould and transmitting viruses. Control options include targeted insecticide applications (spirotetramat, buprofezin) and encouraging natural enemies (parasitic wasps such as Anagyrus pseudococci are commercially available). Mites (particularly Pacific spider mite and two-spotted mite) become problematic in hot, dry summer conditions; insecticidal soap or miticide sprays manage acute outbreaks. Birds are a near-universal issue as harvest approaches, netting is the only reliable solution.

Harvest, yield expectations and storage

A well-established, mature table-grape vine (3 years old and beyond) in a suitable climate will typically yield 5-15 kg of fruit per vine per year depending on cultivar, pruning load, irrigation and soil fertility. In the first and second year, restrict the crop deliberately by removing most bunches, building vine structure is more important than early yield. A mature Crimson Seedless vine on a good site can produce 10-15 kg; Flame Seedless is typically a lighter cropper at 5-8 kg per vine.

Harvesting at peak ripeness makes a significant quality difference. Grapes do not continue to sweeten significantly after they are cut from the vine (unlike bananas or stone fruit), so taste-test regularly in the week before expected harvest and wait for full flavour development. Cut whole bunches cleanly with sharp secateurs and handle them gently, berry skin is thin and bruises easily. Table grapes store best at 0-2°C with high humidity (90-95% RH) and will keep for one to three weeks in the fridge, depending on cultivar. Crimson Seedless and Red Globe keep longer than Thompson Seedless or Flame Seedless due to thicker skins.

Where to buy vines, propagation and getting started

For most home gardeners, purchasing bare-root dormant vines in winter (June to August) is the easiest starting point. Bunnings, Daleys Fruit Trees (online, very good range), Treestock and local nurseries in your state all carry the popular cultivars. For virus-tested, certified propagation material, especially if you want specific cultivars or grafted vines, contact the Victorian and Murray Valley Vine Improvement Association (VAMVVIA) or the Australian Vine Improvement Association (AVIA). These organisations distribute high-health planting material and are the right source if you plan to expand beyond a few backyard vines.

Propagating your own vines from hardwood cuttings is entirely possible and satisfying. Take 30-40 cm cuttings of healthy, pencil-thick cane wood during winter pruning. Dip the base in rooting hormone, strike in a pot of coarse propagating mix and keep moist in a sheltered, frost-free spot. Most table-grape cultivars strike readily from cuttings. Note that propagating from existing vines that may carry latent viruses perpetuates those viruses, if you are expanding a planting seriously, start from certified virus-tested material rather than propagating unknown material.

Troubleshooting checklist

If something is going wrong with your vines, work through this list before assuming the worst. Most problems have straightforward causes and straightforward fixes.

• Buds not bursting / poor budburst: Check chilling hours for your area (particularly relevant in subtropical QLD/northern NSW); apply hydrogen cyanamide (Dormex) if chilling is chronically insufficient — consult label and local extension advice before use
• White powder on leaves and berries: Powdery mildew — begin wettable sulfur or potassium bicarbonate sprays immediately; improve airflow by removing congested shoots
• Yellow oil spots on leaves, white fuzz underneath: Downy mildew — apply copper-based spray; reduce moisture on foliage; check drainage
• Berries rotting before or at harvest (grey fluffy mould): Botrytis bunch rot — thin bunches, remove leaves from fruit zone, avoid overhead water; apply fungicide if severe
• Berries collapsing with maggots inside: Queensland Fruit Fly — install exclusion netting or bunch bags for next season; apply bait station now
• Stunted growth, twisted leaves, rolling foliage: Likely virus infection — no cure; replace with certified virus-free material
• Poor fruit set / small or no bunches: Often poor pollination due to cold or wet weather at flowering, or over-pruning; check nutritional status (boron deficiency affects fruit set)
• Leaves yellowing between veins (interveinal chlorosis): Iron or manganese deficiency, often linked to high soil pH — test soil; apply chelated iron and adjust pH if above 7.5
• Vigorous leafy growth, small or no fruit: Vine too young (normal in first 1-2 years), over-fertilised with nitrogen, or waterlogged; reduce nitrogen, check drainage, ensure correct pruning load