Cissus alata aka Grape Ivy

Cissus alata is an evergreen vine from the tropical Americas. Its native range runs from Mexico to Bolivia and includes Trinidad. Gardeners call it grape ivy or Venezuela treebine. It belongs to the grape family, Vitaceae. Sources also list it under the older name Cissus rhombifolia. This perennial climbs with tendrils and grows fast. It can also trail from a pot or basket.

Garden size varies between the sources. NC State gives heights of 4–10 feet [1.2–3 metres]. RHS gives a taller range of 8–13 feet [2.5–4 metres]. NC State lists a spread of 3–6 feet [0.9–1.8 metres]. RHS gives a narrower spread, up to 1.6 feet [0.5 metres]. The leaves have three glossy, dark green leaflets. Each leaflet has a pointed tip and teeth along its edges. The leaves feel leathery and reach about eight inches long. Brown hairs cover the undersides, with reddish hairs along the veins. Young stems look yellow and carry reddish hairs. Forked tendrils sit opposite the leaves and help the vine climb.

Small greenish-white flowers grow in branched clusters called cymes. These clusters arise where leaves meet the stems. Flowers seldom appear in cultivation and add little visual interest. Purple-black berries may follow, but indoor plants rarely bear fruit. The leaves provide most of the plant's year-round appeal. Growers use it in hanging baskets, pots, or on trellises. It also serves as indoor ground cover and suits shade gardens.

Give this vine bright light without direct sun indoors. It tolerates deep shade and low air humidity. Use a potting mix that drains well but holds some moisture. Keep moisture steady from spring through fall. Let the mix dry between waterings, and water less in winter. It prefers average to cool room temperatures. NC State advises keeping indoor temperatures above 50°F. Its listed USDA range is zones 10–12. RHS rates it H1C, with outdoor use limited to warm summer conditions. Prune at any time to control its shape. Stem cuttings offer a way to grow new plants.

Care needs are low, but problems can occur. Watch for mealybugs, spider mites, scale, and whiteflies. Leaf spots, mildew, and root rot may affect plants. Both excess water and dry soil can cause leaf loss. Sources list it as non-toxic to cats, dogs, and horses. They do not establish any edible use.