Sunflower has a short growth cycle, a strong glare, and a very drought-resistant. It does not require fine care during the growth process, which is an excellent choice for grass flower lovers to try for the first time.
Sunflowers are short in growth and do not fear high temperatures. In addition to the winter season, it can be broadcast in three seasons. The specific growth temperature is more than 15 degrees at night, and more than 20 degrees during the day. Therefore, in the Yangtze River Delta region, it can be planted from April to September, and the flowers are seen that year. (Snow planting visible flowers in September but may have some effect on post-flowering seed development, no problem considering no seed retention).
Sunflower seeds, which are common sunflower seeds and sunflower seeds, have the same shape as roasted seeds. However, the dwarf sunflower seeds of the horticultural variety are smaller. Common varieties are: smile (laugh), folk songs, (toy) bear, Miss Sunshine, etc., plant heights ranging from 15CM to 30CM, suitable for potted plants.
Sunflower seeds are large achenes with full particles. The seed has strong activity, strong resistance, and can be used for seedlings, ordinary peat, and even ordinary garden soil, without special seedling treatment. When planting, the sunflower seeds are inserted vertically into the seeding medium with the tip pointing downwards, covering about 1-2 cm. Keep the medium moist before emergence. Generally 3-7 days of emergence. Seed germination requires shading, and proper soiling helps to remove the cap when sprouting.
After the seeds are germinated and unearthed, the medium is kept moist and placed in a sunny place to manage. Keep the environment and medium moist, accept strong sunlight, and the lack of light will be long.
(The third to fifth days after budding) The appearance of the real leaves, at this time, such as seedlings can be densely seeded (when the germination rate is worried, two seeds were put in individual seedling blocks). Carefully remove the medium with a toothpick, tweezers, etc., and take out the seedlings that need to be removed and transplant them into a small bowl. Damage to the root system during this period will not affect the growth of later plants. When I was transplanting, I had a root system that was completely broken and buried it shallowly. It turns out that there is no effect at all in the later growth, and the regenerated roots are very healthy.
After the seedlings grow 4 to 6 true leaves, they are planted. The pots use 14CM diameter (No. 5 middle pot), plant material 70% nutrient soil + 30% vermiculite, and 30 grams of rotten chicken manure as base fertilizer. The seedling block can be directly buried in the basin. Take care of the small scorpion and take out the seedlings with soil and implant new soil with soil. Watering through the water.
After the planting, the shaded and ventilated place is allowed to stand for one day, and the whole day can be managed. Water is poured every morning, and the sunflower grows fast and requires a lot of water. The more leaves, the faster the water is consumed.
In the seedling stage, the NPK compound is balanced with water-soluble fertilizer once a week, and the root is 1000 times.
About 25 days after budding, the top of the plant began to bud, and it entered the most vigorous period of growth in the sunflower. On a sunny day, there are two times a day in the morning and evening, and once in the rainy morning. 5-7 days of partial phosphate fertilizer, water soluble 1000 times irrigation roots. Avoid water accumulation at the top of the flower buds when watering or raining.
One month after budding, the flower buds gradually expand. Sunflower is the preferred flower of the top flower. Most of the varieties have only the top inflorescence, and each leaf axillary may sprout branches and small flower buds. These usually do not have the opportunity to develop, but Will share the nutrients, so we have to pick him the side buds, look carefully at each petiole, this is the branching flower buds, knocked out. The flower buds that were knocked out were thrown into the corner of the flower pot, and the soil came to the soil and turned into fertilizer.
Planting for 41 days, the plant height is about 20CM-25CM, and it is about 1/3 to 1/2 of the height of about 2 weeks from now.
After sowing for 47 days, you can see the yellow petals in the flower buds.
After 50 days of sowing, the sunflowers are vying to open.
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