Allamanda cathartica 'Hendersonii' is a handsome vigorous evergreen perennial vine which can climb to heights over 50 feet or can be pinched back to grow as a large freestanding shrub. The plant has glossy green leathery leaves year-round and exceptionally attractive night-scented orange-yellow trumpet-shaped blooms nearly year-round.
In temperate regions, allamanda may be grown outdoors in containers during the summer months and brought into a greenhouse or conservatory to over-winter. They require full sun and fertile, well-drained, acidic soil for best growth. Though somewhat drought tolerant, they look and grow best with evenly moist conditions. Best flowering in full sun. Best performance occurs in hot and humid climates where nighttime temperatures do not dip below 15 degrees
Grow as annual vine for porches, trellises, fences or through large shrubs. Container plant that can be overwintered indoors. In tropical areas, it is often grown as a hedge.
Plants with thin leaves need daily watering and ones with thick leaves need watering 3-4 times a week. This will also depend on the season. Generally during the blooming period, plants love a lot of water. Try keeping the soil moist. During winters it is better to cut back on watering.
Keep the plants in a well drained soil with a drainage hole at the bottom. This will help to avoid over watering. Take care as to not leave stagnant water on top of the soil. Fertilise the plant once in 2-3 weeks during its blooming period. Do not fertilise it in winters.
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