What are the cultivation methods and precautions for sago palm (cycad)?
Sago palm prefers a warm and humid environment, is not cold-tolerant, grows very slowly, and has a lifespan of about 200 years. In southern China's tropics and the southern subtropics, trees over 10 years old bear flowers and fruit almost every year, while sago palms cultivated in the Yangtze River basin and various northern regions often never bloom throughout their lives, or only occasionally bloom and bear fruit. Sago palm loves light and iron, and is slightly tolerant of semi-shade. When planted in the open ground in the Shanghai area, measures such as wrapping with straw must be taken in winter for warmth. It prefers fertile, moist and slightly acidic soil, but can also tolerate drought. It grows slowly, and plants over 10 years old can bloom.
Propagation methods for sago palm
Propagate with seeds and by division; harvest mature seeds in autumn, sow them in a high-temperature, sunny sandy loam plot, sow in furrows 6-10cm deep with 20-40cm between furrows, space plants 10-15cm apart in holes, cover with soil to a thickness equal to 2 times the seed diameter, press down lightly, cover with grass and water to keep moist. After seedlings emerge, remove the covering grass.
1. Division propagation. Cut offshoots from the trunk, plant them in sandy loam with 20-30cm between rows and 10-15cm between plants, cover with 6-8cm of soil, and shade them; they are easy to keep alive under semi-shade conditions.
2. Trunk section propagation. Cut the trunk into sections of about 10cm, bury them in sandy soil, cover with 4-6cm of soil, water frequently to keep moist, and once new shoots emerge from the trunk sections, they can be planted separately.
3. Seed propagation. Collect seeds in late autumn and sow them immediately after collection, or store them in sand and sow them in the following spring; because the seed coat is thick and hard, sprouting is slow, generally germinating after 4-6 months; the temperature must be kept above 15 degrees, and the soil covering should be deeper, about 3 cm; at a high temperature of 30-33°C, they can germinate in about 2 weeks; the seedlings grow slowly, and the young plants need 2 to 4 years before they can be transplanted.
Cultivation methods for sago palm
1. Potting soil. Fertile sandy loam is best. The mixing ratio is one part loam, 1 part composted humus soil, and 1 part coal ash, fully mixed. Such soil is loose, fertile, permeable and airy, and is very suitable for sago palm growth.
2. Pruning. When the stem grows to 50 cm tall, the old leaves should be cut off in spring, and afterwards one round should be cut each year, or at least once every 3 years. If the plant is still small and its spread is not ideal, all the leaves can be cut off; this will not affect the angle at which new leaves emerge and will make the plant more perfect. When pruning, cut as close to the base of the leaf stalk as possible, so that the stem is neat and beautiful.
3. Repotting. Potted sago palms should be repotted, at least once every 5 years. When repotting, bone meal and other phosphorus fertilizers can be mixed into the potting soil, and the best time for repotting is when the temperature is around 15°C. At this time, for vigorously growing plants, some old roots should also be properly trimmed away to help new roots grow in time.
Field management for sago palm
After sowing, keep the soil moist at all times; after seedlings emerge, pay attention to weeding and topdressing; after 2-3 years of cultivation, plant them separately once. Within 4-5 years after planting out, carry out intertillage and weeding 3 times each year, in April, June and October; apply topdressing 2 times, in April and October, using human and livestock manure water or farmyard manure. After that, only carry out intertillage once each in spring and autumn every year, and apply farmyard manure during the autumn intertillage.
Sago palm prefers a slightly moist soil environment. Because it grows very slowly, be sure not to water too much, otherwise it is unfavorable for the normal physiological activity of its root system. From March to September each year, apply a dilute liquid fertilizer to the plant once a week, which can effectively promote leaf growth. Keep the environment as ventilated as possible, otherwise the plant is prone to scale insects. Sago palm prefers warmth and fears severe cold; its optimum growth temperature is 20-30°C, and the overwintering temperature should not be lower than 5°C.