Spring, early summer and autumn are the peak seasons of black peony. In management, grafted plants can be fully watered because of their rapid growth, but the basin soil can not accumulate water, otherwise it will cause root rot; And often spray water on plants to increase air humidity; Apply compound fertilizer or decomposed liquid fertilizer every 15 days, which should be light but not thick, and be careful not to splash fertilizer water on plants.
However, due to the slow growth of sowing seedlings, water and fertilizer should not be too large during cultivation. Just keep the basin soil moist and fertilize once a month to meet the nutrients needed for its growth. Strictly control watering in winter, let the plants sleep and resist the low temperature of 0℃, but the flowering period will be delayed. If the humidity is 10℃, you can continue watering to make the plants grow and bloom.
Change the basin every 1~2 years in spring. The soil should be loose, breathable, well-drained and coarse, with certain fertility and calcium. 3 parts of humus, 4 parts of coarse sand, 0/part of slag/kloc, and a small amount of bone powder or shell powder.
In recent years, there are also enthusiasts who use small particles of sapphire or ceramsite instead of coarse sand, and the effect is also good. This variety is susceptible to rust, so it should receive more sunlight when cultivated to prevent rust; Potassium fertilizer can also be added to improve resistance; Once plants are infected with rust, triadimefon or other fungicides can be used to control it.
Extended data:
I. Morphological characteristics
It has a long, fleshy straight root and a spherical, flat gyro-shaped stem with triangular or prismatic warty protrusions like stones. Flowers are solitary, funnel-shaped, open at day and closed at night, with white, pink, yellow, purple, red and so on. The flowering period is from autumn to winter. Berries are oval, green and have black seeds.
Second, the method of reproduction.
Sowing is a common method to breed black peony. Generally, potted plants are planted indoors from March to May. The optimum temperature for seed germination is 20~24℃, and it germinates 7~ 10 days after sowing. Seedling growth is slow, and it takes 4~5 years to blossom. In order to speed up its growth and make it blossom ahead of time, seedlings are often grafted horizontally, and wood can be drilled with triangular prism and grass ball. Grafted seedlings grow very fast, usually bloom in 2 years, and the amount of flowers is large.
However, grafted plants are prone to premature aging, small in plant type and false in appearance, and seedlings with the same specifications in the market are several times or even dozens of times more expensive than grafted plants. In addition, small plants sprouting from old plants can also be cut off for grafting or cutting.
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