Fri Dec 23, 2011 9:31 pm
Propagation
Amaryllis can be propagated by seed, offsets or cuttage. They are also commercially propagated through tissue culture.
Seed pods mature within 4 to 5 weeks after the flower has been pollinated. Pick the pods as soon as they turn yellow and split open. Remove the black, papery seeds from the pod and plant them immediately in pots or flats containing a well-drained medium such as vermiculite or coarse sand mixed with peat. Cover the seeds lightly with additional medium. Keep the newly planted seeds in partial shade until they germinate. Then gradually increase the amount of light they receive until they are in full sun. Fertilize with a half-strength liquid fertilizer solution every other week. Seedlings are ready for planting in the garden after one year.
Seeds do not always produce plants similar to their parents, so amaryllis are usually propagated by offsets or cuttage. Offsets (small bulbs) develop on the "mother" bulbs during the growing season. Bulbs can be dug and divided in the fall after the leaves begin to yellow and brown. Offsets that are at least ¼ to 1/3 the size of the mother bulb can be removed by simply breaking or cutting them off. Pot or plant them immediately; offsets will usually bloom within 2 years. Cut the leaves of the mother bulb about 1½ inches above the top of the bulb and the roots to within 2 inches of the bulb. Replant immediately.
The best time to propagate amaryllis from cuttage (sometimes called "twin scale cuttage") is from July to November, after the bulbs have flowered and grown for several months. Bulbs cut earlier do not propagate as well. Amaryllis are "true bulbs" similar to onions and have thick, fleshy bulb scales attached to a basal plate at the bottom of the bulb. Cut the bulbs vertically into four or more sections making sure that each piece has at least 2 scales attached to a portion of the basal plate. The larger the piece, the faster it will produce a flowering plant. Apply a fungicide dust to the wedges to retard disease, and plant them basal plate down so that 1/3 of the piece is covered by a moist, well-drained medium such as vermiculite, or a mixture of peat and sand. Keep warm, moist and shaded. Small bulblets will begin to form between the scales of cut pieces in about 4-8 weeks and leaves will begin to sprout soon after. Transplant into small pots when one to two leaves have formed. Plants will bloom within 2 or 3 years in Florida.
TT đã thử cách cắt củ này ra trồng và thành công đó.