The houseplant popularly known as amaryllis is really a Hippeastrum. Many are sold in flower during the winter, or as bulbs that grow with phenomenal speed once started. You should be able to keep them so that they flower another year if you follow this advice.

• Cut the flower stalk close to its point of origin once the flower fades.
• Keep watered, and feed occasionally.
• From late spring onward, keep in a greenhouse or conservatory if possible.
• If you don’t have a greenhouse or conservatory, stand the plant outside for the summer.
• Let the foliage die down in late summer or the autumn.
• Start into growth again in late autumn or early winter.