The seeds of thistle are smaller and need to be seeded more carefully. Generally, it is suitable for sowing in greenhouse at the beginning of February or in open field at the beginning of April. The cultivated soil is suitable for half of agricultural fertilizer and half of garden soil, mixed with a small amount of rotten leaf soil, mixed evenly and screened. Put the culture soil into a suitable container, lightly compact the substrate, and then pour it into water. After the water seeps in, the seeds can be evenly spread on the wet soil. It should be noted that the depth of covering soil should not be too thick, and it is better to cover seeds tightly. Then keep the basin soil moist. It will be about 10 days. When the seedlings grow 2 pairs of true leaves, they can be divided. Note that the seeds of thistle are small, so the seedlings grow slowly.
The advantage of cutting propagation is that it can promote the early formation and early flowering of thistle plants. Besides the low temperature in winter, cutting can be carried out in other growing seasons with high survival rate. First of all, prepare to grow healthy large mother plants, put them in the greenhouse in winter, and select the robust growth of artichoke branches in early spring, and keep 2-4 real leaves. The length of the branch is about 5-6cm, and the scissor is located under the node, which can be cut and inserted at any time. The cutting depth is about 1 /3-1 /2 of the cutting length. In high temperature season, the cuttings should be placed in a cool and ventilated place to prevent the damage caused by high temperature and sunshine. Generally wait about 10 days time can take root, after that can carry on the seedling.