Two hoyas of quite different habit are Hoya carnosa and H. bella. The climbing H. caniosa has glossy green leaves and waxy pink and whiteand H. bella is a much smaller, pendulous plant with white, crimson- or violet-centred flowers. It is excellent for hanging baskets and for growing as a pot plant.
H. carnosa grows well when planted in the greenhouse border, but where space is limited it can be grown in large pots of John Innes No. 2 Potting Compost. A temperature of 18 to 24°C. (65 to 75°F.) is needed from March to October, and 7 to 13°C. (45 to 55°F.) in winter. Water freely from March to September, but only moderately during the rest of the year. Feed regularly with liquid or soluble fertiliser during summer and autumn, and in spring, pot-grown specimens can be topdressed with fresh compost. The vigorous branches will need some support, and it looks particularly attractive if trained to horizontal wires so that the clusters of flowers can hang downwards. Anythat is necessary to keep the plants in shape should be done in February.
Hoya bella is a more tender plant than H. carnosa, requiring slightly higher temperatures throughout the year. It is also much less vigorous, and care should be taken not to overwater it.
Increase is by cuttings of the previous year’s growth, taken in spring. Insert in sandy compost in a propagating frame with a temperature of 24°C. (75°F.). Strong shoots of H. carnosa can also be layered by removing a few leaves and pegging the stem down into a pot of John Innes No. 1 Potting Compost.