Why can't I overwrite it?
Many people in order to promote germination, will cover a layer of wet paper towels on the seeds, or a layer of soil after planting, but some small grass seeds can not be covered, once covered, they will not sprout.
Which seeds can't be covered?
Like Petunia, sky star, Eustoma grandiflorum, hexaploid, Campanula and other grass flowers, the seeds are very small, germination needs to see light, sowing can not cover
In addition, pelletized seeds cannot be covered. What is pelletization? Is several small seeds a piece of medicine powder, called pelleting, pelleting seeds are still smaller than sesame seeds.
Note: be careful when buying seeds. Don't buy fake seeds, such as those with six times interest and all over the sky. They are too small to be pinched. They are like dust. All big seeds are fake.
Sowing method (take Petunia as an example)
1. Preparation: put loose, fertile and well drained slightly acid sandy soil in the seedling basin.
2. Sowing: directly sprinkle the seeds on the soil surface, water permeable, keep completely wet, and put them on the well ventilated windowsill!
3. Sprout and grow roots: sprout in a week or so, spray water every day after sprouting, keep ventilation and astigmatism, and grow white roots in 20 days or so.
4. False planting: the seedlings are small and cannot be directly planted in a large basin, so the survival rate can be greatly improved. Transfer the seedlings with soil into a small flowerpot or disposable paper cup, water and ventilate for maintenance, see more light every day, spray water sooner or later.
5. Planting: when the leaves of the seedlings are full of cups, they can be planted. The flowerpot can be more than 20cm long. The soil can be mixed with garden soil, perlite and coal.
Tear the paper cup directly, plant the soil with seedlings in the prepared basin soil, put it in the shade for 1-2 days after planting, and then put it on the balcony with sufficient light, often take heart.
6. Maintenance: in the early stage, apply thin nitrogen fertilizer and water every 10 days. Before flowering, apply a little potassium dihydrogen phosphate. Pay attention to thin fertilizer and apply it frequently.
Seed soaking and sprouting
Some flowers have thick seeds, long dormancy period, and are not easy to germinate. They need to be soaked in lavender, sage, and cabbage before sowing.
Seed soaking techniques
Soak the seeds in warm water for 12 hours, then put them in gibberellin of 20 ~ 50ppm for 2 hours.
Sowing method (taking Lavender as an example)
1. Put the loose and breathable nutrient soil in a small basin, fill it to 8 points, water it, and then sprinkle the seeds.
2. After sowing, there is no need to cover the soil, but you can cover a layer of film to moisturize, poke a few holes on the film, ventilate, and germinate in about 2 weeks.
3. In seedling stage, water should be sprayed regularly, and light should be increased gradually. Nitrogen and phosphorus fertilizer should be applied mainly. When the small seedling is about 10cm long, it can be transplanted and planted.
Like geranium, corydalis and other grass flowers, seeds slightly larger, germination does not need light, sowing slightly covered, can improve germination rate
Seeding method
1. Prepare loose and fertile garden soil. After watering, sprinkle seeds on it, and then cover it with a layer of soil. Water it every day to keep it moist, and sprout in about 10 days.
2. After two leaves emerge from the seedlings, you can move the flowerpot to the sun, increase the amount of water properly, and keep the ventilation.
3. When the leaves in the small basin are full, they can be transplanted into the large basin, during which a little thin nitrogen fertilizer can be applied.
4. In the maintenance process, you can pick the heart and trim it at any time, and it will be a big flower ball in 3-4 months.
After the Pelargonium is sown in spring, it's difficult to spend summer. Now it's a good time to plant.
In addition to the above mentioned, there is also a kind of flower - Eclipta, the seed skin is relatively wrinkled, need to soak seeds, peel off the soft skin, and then use vermiculite or wet paper towel to promote buds, sprout new buds and transplant them into the basin..