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How to promote the normal germination of seeds
Different kinds of flowers, due to different seed coat structure and physiological characteristics, the seed germination period is also different. Some flowers such as cineraria, impatiens, a string of red, etc., can be seeded as soon as seeding is appropriate; and some flowers can take several months or longer to germinate, so artificial germination must be carried out to shorten seed dormancy. period. The common knowledge of flower sowing is introduced for your reference. 1. The seeds of flowers selected for sowing should be individuals that are full, free of pests, and have a similar degree of maturity. Only in this way can they sprout robust seedlings in due course. Second, seed treatment of different flower seeds, should adopt different methods of treatment. Seed easily germinated soaking can be used, such as a string of red seeds soaked in warm water at 40 °C for a day and a night, rinse clean to sow. Hard seeds such as asparagus, peony, kiritake, red scent, and red sun, etc., are best soaked in warm water at 40°C for 48 hours and then sowed in the soil. It takes only 20 to 30 days for budding to grow. For the short dormancy, easy to germinate the Pearl Plum, Bauhinia, Jinhua flowers, soaking with warm water at 40 °C to 60 °C for 24 to 48 hours, you can directly sow. Some flowers such as cloves, waxy plums and some autumn-sowing herbaceous flowers need to be treated at a low temperature (0°C to 10°C) for a period of time in order to promote postharvest and break the dormancy of the embryos and germinate. The method is to mix seeds with sand with a humidity of 60%, then put them into plastic bags, fasten the mouth tightly, put them in flower pots, and bury the pots in a depth of 40 to 60 cm. The seeds can also be placed in a refrigerator at 3 °C to 5 °C for 60 to 90 days and sown out in the spring. It can also be planted in the autumn to allow the seeds to pass through the natural freeze in winter and be sprouted the next spring. Some flowers, such as tassels, peony roots and peony seeds, have the characteristics of double dormancy of radicles and hypocotyls, ie, their radicles also require a high temperature of 25°C to 32°C for 1 to 2 months or longer to break the dormancy. . For this kind of seed, it needs to be mixed with wet sand before sowing. After a period of high temperature, it will be transferred to low temperature. After temperature-changing treatment, seeds can germinate in spring. Third, the choice of sowing period is generally one-year flowers are not tolerant to cold, open field planting can be planted after the night frost, in order to promote its early flowering and more flowers, can be earlier in the greenhouse or cold bed nursery. The biennial flowers and perennial flowers are hardy and the seeds are suitable for germination at low temperatures and should be sown in autumn. Most of the flowers in the first and second year can also be reproduced. Consider the flowering period. According to the number of days for each flower from germination to flowering, sowing is planned. There is no strict seasonal restriction on greenhouse flower sowing, which can be determined according to the flowering period. Small particles, loose skin, such as seeds of chrysanthemum, asparagus, impatiens, day red, gardenia, etc., suitable for sowing in the late spring; larger particles, solid skin or oily seeds, such as rose, rose, pomegranate Kumquats, Kwong Yulan, and Fragrant are suitable for sowing in autumn and winter; seeds with smaller granules, relatively thin skin and requiring high temperature should be sown in time after maturity, such as cineraria, cyclamen should be sowed in early summer, dianthus, three Scorpions, gold melons, etc. should be sown in late autumn. Fourth, the sowing method is divided into open sowing and pot sowing according to the sowing place, divided into sowing, drilling and sowing by method. Full water should be poured before sowing, cover with plastic film after sowing, or cover the flowerpot with a glass cover in order to protect the earth and prevent the soil from drying to affect the seed germination and emergence. The sowing depth should be about two and a half times the seed diameter. Small seeds such as cockscomb, August chrysanthemum, cineraria, and Begonia sinensis are sprinkled with fine sand or soil powder. During the germination of the seeds, water should be moisturized at the sowing place, but not too much to prevent the decrease of soil temperature or erosion of seeds and roots of seedlings.