The seeds of Bauhinia, Sorbaria and Jindai flowers have a short dormancy period and are easy to germinate. They can be directly seeded after soaking in warm water of 40 to 60 degrees for 1-2 days. And some flower seeds have colloidal, waxy seed coat, if torch tree, want to soak the seed with 90 degrees water first, cool naturally 24 hours to make its seed coat soften, absorb water, promote seed germination..
The water temperature should not exceed 60 - 90 degrees for more than half an hour or an hour, and then the water temperature should fall below 40 degrees, otherwise the embryo will die easily.
Rosa roxburghii, wintersweet, forsythia, lilac and some autumn herbaceous flowers need a certain time of low temperature (temperature between 0-10 ℃) to break the dormancy of seed embryo and promote seed germination.
Mix the seeds with the sand with the humidity of 60%. Put the seeds into the plastic bag, then tie the bag tightly and put it into the flowerpot, and then bury the whole flowerpot in the open ground with the depth of 40-60cm. Or you can put the seeds in a 3-5 degree refrigerator for two or three months, until spring sowing. It can also be sown in autumn, and the seeds will germinate in spring after natural freezing in winter.
The seeds of tassel, peony, peony and other flowers have the habit of double dormancy of radicle and hypocotyl. The radicle needs to break the dormancy for one month or more under the condition of 25-32 degrees, and the hypocotyl needs to break the dormancy for one month or more under the condition of 3-5 degrees. This kind of seed should be mixed with wet sand before sowing. After a period of high temperature, it will turn into low temperature.
When the seeds are treated with variable temperature, the time of high temperature period and freezing period should be enough, otherwise the seeds will be difficult to emerge after sowing.
