Vitis californica aka California Wild Grape

Vitis californica is a deciduous climbing vine in the grape family, Vitaceae. Its native range runs from Oregon into California. It grows along stream banks and in canyons. These habitats lie below about 3,940 feet [1,200 metres]. The vine loses its leaves for winter. It suits a sunny woodland edge or a site with dappled shade.

This species grows at a moderate rate. It can reach about 30 feet [9 metres] in height. Tendrils help it climb onto a support. Flowers appear from June to July. Each flower has both male and female organs, and insects provide pollination. Seeds ripen from September to October. The small fruit measures about 0.3 inches across. It contains juice, but only a thin layer of flesh.

Plant it in deep, rich loam that drains well. It prefers moderate soil fertility and grows well in lime-rich ground. It also accepts sandy soils and clay. Suitable soil pH ranges from mildly acid to mildly alkaline. The vine can grow in sun or partial shade. Fruit needs a warm, sunny spot to ripen. It accepts dry or moist soil, though rich, moist loam is preferred. PFAF lists USDA hardiness zones 6–9. Late spring frosts can harm new shoots. Prune in winter while the vine rests. Cuts made during active growth can bleed heavily.

The fruit is edible raw, cooked, or dried for winter. It can also go into jelly and pies. Its small size and scant flesh limit its food value. Young leaves can wrap other foods before baking. They add flavour to the filling. Young tendrils are edible raw or cooked and taste sour. PFAF reports no known hazards for this species. It lists no known medicinal uses.

The vine also supplies materials for several traditional crafts. Fresh or dried leaves yield a yellow dye. Roots have served as material for basket bases. Woody vine sections have formed rims for large carrying baskets. Smaller vines can twist into strong rope. Growers can raise plants from seed or mature wood cuttings. Cold treatment for six weeks can improve seed germination. Some seeds take an extra year to sprout. Young seedlings need a cold frame for their first winter.