But generally synthetic, such as 2-4D, is used.
2.4-D is a plant regulator. You can change it into many things by adjusting its concentration, such as flowers and fruits, herbicides, preservatives and so on. But it can't promote plants to take root and sprout. If you want plants to take root, just buy some acetic acid or APT. All seed pesticides are sold in shops. They are very cheap, only one yuan a pack. 2。 4-D is generally one gram and twenty cents a pack, which is sold in seed or pesticide stores.