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Hippeastrum
Native to South America, hippeastrum hybrids make ideal houseplants, provided they are kept in warm, light conditions during winter and spring.
Hippeastrums have bold, bright flowers from mid-November right up until the end of spring. They produce flowers up to 25cm (10in) across in colours from pure white and pink to brilliant reds, vibrant oranges and delicate yellows.
All hippeastrums are perennial bulbs that produce strap-like leaves. About 75 species have been recorded, growing in a wide range of conditions from lush river banks to hills in Brazil, Peru and Chile. Commonly known as amaryllis, they're often confused with a different genus that is actually called amaryllis and originates from South Africa.
The bulbs are capable of producing several flower stems, or 'scapes', in one season. Many have stripes, flecks or picotee edges (darker around the edges of the leaves). Height can vary too, with flower-stalks sometimes reaching 90cm (3ft) high or more.
There are lots of varieties to choose from. Here are some of the most popular.
The bulbs should be planted in autumn in a mix of equal parts Irish moss peat and perlite or grit, leaving one-third of the bulb showing.
Place the pot in a warm position at an average temperature of about 21°C (70°F), to promote strong root growth. A shelf over a radiator is ideal.
Feeding should start as soon as a shoot develops and be continued weekly until flowering is over.
Once the bulbs are in growth, move them to a well-lit and ventilated position away from draughts. Hippeastrums will continue flowering for longer in cool rooms at about 16°C (60°F).
Water plants as required, usually once or twice a week during winter and spring, more frequently during summer. Spray leaves with mist during the summer to increase the humidity.
Support developing shoots once they reach 30cm (1ft) by tying them to canes.
Once the hippeastrum has flowered, cut off the flower stems at the bulb's base but allow the foliage to keep growing for as long as possible. This ensures that the bulb will produce plenty of flowers next year. Once the foliage starts to die back, remove it and store the bulb somewhere cool, dark and dry for six to eight weeks to rest.
Once rested, start watering the bulb again and it should begin to to grow again.
It isn't advisable to put plants outside for the summer, unless you can find a sheltered position away from fierce sun and keep a close eye on them.
Strong winds can damage the foliage and blow plants over. Full sunlight can scorch some varieties and all are susceptible to fungal and pest attack.
Never allow hippeastrums to stand in water, as this can cause the roots to rot.
Some people find hippeastrum sap irritates the skin, especially when handling bulbs or cutting flowers. Wear gloves to avoid an allergic skin reaction.
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