How to Grow Potted Amaryllis? A Detailed Guide to the Latest Care Methods

Amaryllis, also known as zhu ding red, gu ting flower, and belladonna lily, among other names, is a perennial herbaceous plant of the genus Hippeastrum in the Amaryllidaceae family. It is distributed in Brazil and Hainan Province and other areas of mainland China, and has been introduced and cultivated artificially. It is suitable for potted planting to decorate rooms, living rooms, hallways and corridors, and can also be grown in courtyards or planted in flower beds. Now let us take a look at how to grow potted amaryllis!

Amaryllis Growth Habits

Amaryllis prefers a warm, humid climate. The suitable growing temperature is 18-25°C. It does not like extreme heat, and sunlight should not be too intense, so it should be kept under a shade structure. It is afraid of waterlogging. During the winter dormant period, it requires a cool and humid climate, with 10-12°C being ideal, and it must not go below 5°C. It prefers sandy loam rich in humus and with good drainage, with a pH of 5.5-6.5. If the soil is too moist in winter and the temperature exceeds 25°C, the stems and leaves will grow vigorously, hindering dormancy and directly affecting normal flowering the following year. Light also has a certain effect on the growth and flowering of amaryllis. In summer, avoid prolonged direct strong light; in winter, sufficient sunlight is needed for cultivation.

Amaryllis Propagation Methods

1. Sowing: Amaryllis seeds should be sown immediately after collection, giving a high germination rate. The sowing soil is a mix of 2 parts peat soil and 1 part river sand. The seeds are relatively large and should be sown in spots, with a spacing of 2-3 cm. The suitable germination temperature is 15-20°C, seedlings emerge in 10-15 days, and they are pricked out when they have 2 true leaves. It takes 2-3 years from sowing to flowering.

2. Bulb division: Amaryllis is often propagated in large numbers by artificial cutting of the bulb to produce daughter bulbs. That is, the mother bulb is cut lengthwise into several sections, then each is halved in the middle so that the lower end of each retains part of the basal plate as a rooting site. They are then inserted into a cutting bed mixed with peat soil and sand, watered appropriately, and after 6 weeks, 1-2 small bulbs can form between the scales and roots develop at the bottom.

3. Cuttage: The mother bulb of amaryllis is cut lengthwise into several sections, then the scales are further cut and inserted obliquely into vermiculite or sand. They are planted out when 2 true leaves have grown. When planting the false bulb, if the potting soil is too loose, flowering may be delayed or the number of flowers reduced. A mix of 5 parts sandy loam, 2 parts peat soil and 1 part sand can be used, and the planting depth should be such that 1/3 of the bulb is exposed above the soil surface.

How to Grow Potted Amaryllis?

1. Soil: Amaryllis requires loose, fertile sandy loam for planting, with a pH of 5.5-6.5, and must never be waterlogged. The potting soil can be prepared by mixing 2 parts well-rotted manure soil, 6 parts leaf mold and 2 parts sandy soil.

2. Watering: Amaryllis needs to be kept moist, and watering should be thorough. But avoid excess water and poor drainage. Generally, indoor air humidity is sufficient.

3. Sunlight: Amaryllis likes sunlight and can take a moderate amount of direct sunlight, but not for too long. It should be placed by a window with bright light, good ventilation and no direct strong light.

4. Temperature: Amaryllis prefers warmth and is not cold-tolerant. In summer it should be kept cool, with a temperature of 18-22°C being ideal. During the winter dormant period, it requires a cool, dry environment, and the temperature must not go below 5°C.

5. Fertilizing: Amaryllis likes fertilizer. When the leaves have grown to 5-6 cm long, start applying top dressing. Generally, apply well-rotted cake fertilizer water once every half month. After flowering, change to applying it about once every 20 days to promote bulb enlargement and the production of new bulbs.

6. Pruning: Amaryllis grows quickly, with long and dense leaves. When repotting and changing the soil, cut off withered leaves, dead roots, and roots and leaves affected by pests and diseases, keeping only vigorous leaves.

Amaryllis Wintering Management

1. Bulb wintering: For amaryllis bulb wintering, the bulbs are usually dug out in early October (be careful not to damage them), the upper stems and leaves are cut off, the soil on the roots is washed clean, and they are sun-dried or dried in the shade. After the bulb surface and cut wounds are dry, place them in a dry indoor place or store them centrally in sand.

2. Potted wintering: For amaryllis overwintering in the original pot with soil, it must be placed in a greenhouse. The potting soil must be kept dry. If the soil is too moist, the plant will continue to grow, which will hinder its dormancy and affect normal flowering the following year. With high humidity in winter, the flower buds inside the bulb are prone to rot, resulting in no flowers the following year. Plants overwintered in pots sprout flowers and leaves earlier than plants overwintered in dry storage.

3. Open-field wintering: In areas south of the Yangtze River, amaryllis can overwinter in the open field. The method is simple: in late autumn and early winter, cut off the leaves, and mound soil around the bulb or cover it with rice straw. Plants overwintered in the open field grow vigorously the following year, with strong flower buds, but in areas with a lot of rain and snow and in conditions with poor sunlight and ventilation, rot is likely to occur.

4. Seedling wintering: Amaryllis seedlings should be placed in a greenhouse for continued cultivation, with continued watering and fertilizing, and kept vigorous through winter as well, so that they can grow rapidly once spring begins. This method allows adult bulbs to be obtained earlier.

Amaryllis Pest and Disease Control

1. Leaf spot disease: Leaf spot disease harms leaves, flowers, scapes and bulbs, causing round or spindle-shaped reddish-brown spots, and is especially common in autumn. Diseased leaves should be removed. Before planting, soak the bulbs in 0.5% formalin solution for 2 hours, and spray equal-strength Bordeaux mixture regularly in spring.

2. Viral disease: Viral disease causes the roots and leaves of amaryllis to rot. It can be used; after invasion, it causes disease in leaves, stems and flowers, and gradually spreads toward the bulb. The bulbs need to be soaked in 43°C warm water with 0.5% formalin for 3-4 hours to achieve control.

3. Nematode disease: Nematodes mainly invade through the stomata on leaves and flower stems. After invasion, they cause disease in leaves, stems and flowers, and gradually spread toward the bulb. The bulbs need to be soaked in 43°C warm water with 0.5% formalin for 3-4 hours to achieve control. Among pests, there is damage from red spider mites, which can be killed by spraying with 1000 times dilution of 40% dicofol emulsifiable concentrate.

4. Red spot disease: Red spot disease harms leaves, flowers, scapes and bulbs, causing round or spindle-shaped reddish-brown spots, and is especially severe in autumn. Diseased leaves should be removed. Before planting the bulbs, soak them in 0.5% formalin solution for 2 hours, and spray Bordeaux mixture in spring for prevention.

5. Pests: To make amaryllis grow vigorously and bloom early, pest and disease control should be carried out, spraying pesticide once a month. Spraying should be done on clear days at around 9 a.m. and 4 p.m. Do not spray under the scorching midday sun to prevent pesticide damage.