Grape
Vitis vinifera
Sun-trained vine said to grow sweeter with geraniums at its feet.
- Type
- Fruit · Perennial
- Botanical family
- Mixed / other
- Foliage color
- Green
- Flower color
- Purple and violet
- Sunlight
- Full sun
- Watering
- Low–moderate
- Soil
- Free-draining, moderately fertile
- Feeding
- A potassium-rich feed in spring, then a liquid feed every two weeks once the fruit has set.
- USDA zones
- 4a–10b
- Frost tolerant
- Yes
- Flowering
- June
- Pruning
- Cut hard in midwinter, and pinch the side-shoots back through summer.
- Plant out
- at the last spring frost
- First harvest
- 150 days after the last spring frost
- Harvest ends
- 14 days before the first fall frost
- Apr–Jun Bud Break
- Jun–Jun Flowering
- Jun–Sep Fruit Set
- Sep–Oct Harvest
- Oct–Nov Growing
- Nov–Dec Leaf Fall
- Jan–Apr Leaf Fall
- Plant spacing
- 5 ft 11 in
- In-row spacing
- 4 ft 11 in
- Between rows
- 8 ft 2 in
- Square-foot density
- Not suited to SFG
- Root system
- Woody, and deeper than the stem suggests
- Working depth
- 24 in–5 ft
- Can reach
- 10 ft down where the soil allows
- Spread
- 10–20 ft across, about 1–2× the width of the plant
- Shallowest pot
- 20 in of soil
A vine puts far more below ground than its one thin stem implies, and that is where the alarming vigour comes from. Give the root run depth and drainage at planting; it will forgive almost anything done to it above ground afterwards.
The vine roots deeper than almost anything else in the garden, which is where the drought tolerance comes from and why an established vine is watered rarely if at all. Prepare depth at planting rather than richness: a vine in fed, damp ground makes leaf and poor fruit.
Figures recorded for Grape itself. Roots follow the soil either way: a compacted pan, a high water table or heavy clay stops them well short of any of it, and deep open ground lets them go further.
- Cats
- Not on a list we read
- Dogs
- Recorded toxic
Recorded as toxic to dogs by Pet Poison Helpline.
The Pet Poison Helpline entry names dogs only; it does not clear cats. The ASPCA has no plant-database entry for Vitis at all, which is worth recording: two of the four references had nothing to say about one of the best-known hazards there is.
- When
- Late August to October depending on variety and climate (greenhouse vines earlier); vines crop lightly in year 3 and fully by year 5. Leave bunches longer than you think — color arrives weeks before flavor.
- What to look for
- Taste is the only reliable test: sweet with softened acidity. Supporting cues: full color bunch-wide, translucent berries, brown (not green) seeds, a woody-brown bunch stem, and a dusty bloom. Berries detach easily from the stem when truly ripe.
- How to harvest
- Cut whole bunches with secateurs, holding by the stalk — never the berries, to keep the bloom intact. For long-hanging storage cut with a length of cane ("T" of stem) attached.
- How often
- Bunches ripen over several weeks; cut each as it reaches flavor rather than stripping the vine, and snip out any split or moldy berries within bunches as the season runs.
- Storing the crop
- Refrigerate unwashed up to 1–2 weeks. Traditional long storage: stand the cut cane-end in a bottle of water in a cool room and bunches keep for weeks. Otherwise juice, make jelly, dry to raisins (sweet seedless types), or freeze berries for eating frozen — fresh texture doesn't survive thawing.
- Vine weevil Adults notch leaf edges at night; their plump C-shaped grubs devour roots, especially in containers. Hand-pick adults after dark and water in biological nematodes in late summer.
- Birds Birds and wasps
- Downy mildew Yellow patches on the upper leaf with gray-purple mold beneath, in cool wet weather. Improve air circulation, water at the base, and remove infected leaves promptly.
- Gray mold (botrytis) Fuzzy gray mold on flowers, fruit, and soft growth in cool, damp, still air. Remove affected parts promptly, thin congested growth, and ventilate under cover.
- Powdery mildew A white dusty coating over leaves and shoots when roots are dry but the air is humid. Keep plants watered and mulched, prune for airflow, and remove the worst leaves.
Beneficial predators that hunt this plant's pests — grow their favourite flowers nearby to recruit them. companion plant
- Beneficial nematodes Steinernema & Heterorhabditis spp.Hunts Vine weevil
Microscopic worms watered onto damp soil that hunt down soil-dwelling grubs and release a bacterium that kills them within days. Timing is the whole thing: warm, damp soil and a small target grub, which means late summer for most of what they are used against.
- Frogs & toads AnuraHunts Vine weevil
A resident toad works the beds every night for slugs, cutworms, and weevils. Recruit them with water — even a sunken basin pond — plus damp shade and an upturned-pot toad house; skip the slug pellets that poison their prey.
- Ground beetle CarabidaeHunts Vine weevil
Fast, glossy night hunters that patrol the soil surface for slugs, cutworms, and root-fly larvae. Give them daytime cover — thick perennial edges, stepping stones, a log — and skip the tillage that wrecks their burrows.
- Hedgehog Erinaceus europaeusHunts Vine weevil
A European animal, and worth saying so plainly: there are no hedgehogs in North America, and the ally that does the same night shift here is the toad, the opossum or the ground beetle. Where they do occur, cut a gap in the fence and skip the pellets.
Hyssop, Chives, Roses (as disease indicators)
Grapevines can live and crop for well over a hundred years.
The Cottage Garden Companion — the gardener's herbarium at cottagegardencompanion.com