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Sunflower planting problem
Fertilizer for planting sunflowers is given to 1. Sunflowers consume soil nutrients rapidly because of their rapid growth.

Therefore, it is necessary to add a little fertilizer to make the sunflower grow quickly. 2. Nitrogen and potassium fertilizer are the main fertilizers in the early stage.

So as to promote the stem and leaf to grow sturdily.

In the later stage, phosphate fertilizer is the main fertilizer.

To improve the quality of flowers. Precautions: The suitable germination temperature is between 20 and 30 degrees Celsius. 2. Sunflower has a high demand for light and a wide tolerance for temperature, which is suitable for 15~35℃, but it still grows rapidly in summer. 3. Because sunflower has high light demand and fast metabolism, it has high water demand, so it should be irrigated frequently to keep the soil moist.

Especially during bud formation.

But strive for good drainage. 4. The best way to fertilize sunflower is to mix organic fertilizer into culture soil. 5. When the plant grows to more than 60 cm, props should be set up to support the plant and prevent the branches from breaking. In addition, water every day on sunny days until the soil is soaked and oozing, and do not accumulate water. studeneb.bhes.tpc.edu/92s/s8704 1 1new_page_6

I have planted sunflowers, and the D flowers are so big, beautiful and happy. Do you plant them on the ground or in pots? Because sunflowers are too big, I'm afraid it's hard to have a good harvest if you use pot seeds. Sunflowers are very coarse, and there won't be much problem if there is more water and less water. But if you want D flowers to be big enough, you should give them enough fat and have the heart to D, that is, only keep the main bud and remove other buds on the same stem, so that the main bud can absorb more nutrients. In addition, remember to give it enough sunshine, so planting in summer is the best.

Sunflower cultivation environment Sunflower likes sunshine, and full sunshine is the best cultivation environment, otherwise it will bloom magnificent and lively flowers at least for four hours. The sowing date of sunflower in high cold region is from April to August, and the flowering period is from June to November. On flat land, the sowing date is from March to January, and the flowering period is from January to December, which means that sunflower can be seen almost all year round. Sunflowers for picking melon seeds are two to three meters tall and are not suitable for home cultivation. But in recent years, gardeners have introduced small ornamental sunflowers, which are very suitable for potted plants. Cultivation environment In spring and autumn, seeds are sown by on-demand method or planted directly with six leaves of this leaf, covered with soil for about 20-30 minutes, and the soil in the basin is kept moist, waiting for germination. After budding, it is necessary to receive sunshine, so that the plants are green and healthy. The optimum temperature for germination is 20-30 C, and the optimum temperature for growth is 15-30 C. When Xiaoqu is about 10 cm high, plant one plant every five inches. Planting method: In spring and autumn, sow the seeds on demand, cover them with soil for about 20-30 minutes, keep the soil moist and wait for germination. After budding, it is necessary to receive sunshine, so that the plants are green and healthy. When Xiaoqu is about ten centimeters high, plant one plant every five inches. Sunflower is a panicum miliaceum of Compositae, which has many variations in plant shape, height, inflorescence size, structure and color, and its variability can be described in four words. Therefore, it is not only used for oil and food, but also the best crop for ornamental or ecological landscape maintenance. After reducing soil, sunflower plants can not only supply soil organic matter, but also serve as green manure crops because their plants are rich in primary and secondary nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium and zinc. The optimum cultivation temperature of sunflower is 2 1 ~ 24℃, and the optimum germination temperature should be at least 8 ~10℃. With the average increase of latitude, the number of days from sowing to flowering will increase by 1.9 days. Sunflowers need proper light to develop and grow normally. Protected cultivation often leads to stunted growth due to insufficient light and increased temperature. Usually, sandy soil or loam with good drainage and rich organic matter grows best, but it is not suitable for areas that are too sticky or poorly drained. Although its salt tolerance is high, alkaline soil is not suitable for planting.

Sunflower is a very special flower. What makes it special is its golden color, just like a dazzling sun, and it is called sunflower or sunflower because of its inclination to sunlight. Sunflowers are divided into three varieties: ornamental, oil extraction and sunflower seeds. Ornamental varieties, plants are relatively short, flowers are divided into double petals and single petals, and there are also two varieties of single flowers and multi-flowers; The varieties that press oil and harvest sunflower seeds have high plants and strong vitality. They can bloom almost all year round and do not need special care. It can be said that everyone can grow well. You can watch them all! Then let's hurry up and see how to plant sunflowers! There shouldn't be too much water ~! ! ! ! ! ! ! ! !