Plant your Amaryllis bulbs between six and eight weeks before you’d like them to bloom. Using a pot only a little bigger than the bulb, cover two thirds of the bulb with general purpose compost, leaving the upper third uncovered. Water your amaryllis from the top, keeping the spoil continually moist but not so wet that water collects in the saucer.
As a tender plant, amaryllis need need to be kept at a steady 20 – 25°C to trigger them to begin to grow. At this stage it doesn’t matter if they’re kept in the dark – your airing cupboard is ideal.
Once the bulbs have sprouted, move them to a warm, bright spot to continue growing, remembering to turn them regularly to stop the stems bending towards the window or other light source.
Feed your burgeoning amaryllis with standard tomato fertiliser every 10 days as it grows, and remember to keep that soil moist. Once your amaryllis begins to flower, you can make the blooms last longer by moving the plant to a cooler spot.