Suitable planting material for spring sword seedlings

The substrate formula for potted plants is as follows: rotten wood or wood chaff, 15% chaff, soybean-sized crushed ore (Lanyou in mining area had better use crushed ore, play the role of permeation) or gravel, broken brick or coarse river sand 20%, broken charcoal 15% (or plant ash), mung bean size granular humus soil 50% (this formula means suitable for local, different areas should be proportioned according to air temperature, humidity and other conditions).

If planted on the ground, a layer of 3mur5 cm wood chaff or husk, decaying leaves, peanut shells, etc., should be placed on the finished border, and then covered with about 20 cm of culture soil. the preparation of the culture soil is as follows: about 20% of small finger size gravel, 5% of farm manure fermented for more than one year and treated by fire fungus, 15% of coarse river sand, 60% of decaying soil (black epidermis soil on the mountain). (Qin Shaoxing of Guangxi)