[sunflower planting] how to maintain sunflowers is the most beautiful

Sunflower is a kind of oblique herbaceous plant, which is often used as ground cover plant in garden design, or can also be used as flower bed. The cultivation of sunflowers in the room is to beautify the room and experience the fun of cultivating flowers, so we should pay more attention to the cultivation, so as not to bring regret to the bad flowers.

1. Morphological characteristics of sunflower

Stems thin and round, procumbent or oblique, nodes tufted. Leaves scattered or slightly aggregated, terete, 1-2.5 cm long. Flowers terminal, 2.5-4 cm in diameter, the base has leafy bracts, petals bright color, white, dark, yellow, red, purple and other colors. Capsule when mature lid crack, seeds small, brownish black. Horticultural varieties are many, there are single-petal, semi-double petal, double-petal points.

Second, the reproduction method of sunflower

Sowing propagation: sunflower seeds are very small, about 8400 per gram, spring, summer, autumn can be sown, often using seedling plate sowing, sowing can be slightly covered with a little soil, also can not cover soil. The germination temperature is 21~24℃, about 7~10 days, the seedlings are extremely thin, so if the temperature is kept high, the seedlings grow quickly, and they can form relatively thick and fleshy branches and leaves. At this time, seedlings can be directly on the pot, using pots with a diameter of about 10 cm, planting 2 to 5 plants per pot, with high survival rate and rapid growth.

Sunflower cutting: Sunflower is very easy to cut, cut branches in summer for cutting ears, wilting stems can also be used, after cutting live, buds appear, transplanted plants do not need to bring soil, growth period do not need to be watered frequently. In winter, the sunflower can be moved indoors to the sunlight, so that the pot soil is a little dry, it can safely winter, after the next year is clear, the flowerpot can be placed outside the window, in case of cold current attack, but also need to enter the window maintenance.

3. Cultivation methods of sunflower

Habits: extremely barren, the general soil can adapt, can self-propagation. See sunshine flowers bloom, early, late, cloudy days closed, so there are sunflowers, noon flowers name. The flowering period is from June to September.

Soil: the most suitable for good drainage of sandy soil, available 3 parts of mature pastoral soil, 5 parts of yellow sand, 2 parts of chaff ash or fine sawdust, and then add a little calcium superphosphate powder evenly mixed.

Light: Sunflower happy sunshine, the whole growth period if you can ensure sufficient sunshine, you can flourish.

Temperature: Helianthus thermophilus climate, germination temperature 21~24℃, about 7~10 days of emergence, seedlings are extremely thin, so if the temperature is maintained at a higher temperature, seedlings grow quickly, they can form relatively thick, fleshy branches and leaves.

Insect pests: sunflower very few pests, as long as the control aphids, almond bees, apricot ball hard scale insects, etc., the key to control aphids is to spray before germination, that is, flower bud expansion period. Imidacloprid 4000~5000 times solution can be used at this stage. After germination, the aphid can be killed by using imidacloprid 4000~5000 times solution and cypermethrin 2000~3000 times solution, and the almond bee can also be treated. After fruiting, aphids can be used to kill 1500 times the liquid.

Fertilization: sunflower fertilizer requirements are not high, half a thousand potassium dihydrogen phosphate, can achieve the purpose of large flowers, flowers constantly blooming.

Through the above introduction, we can see that sunflower is a relatively easy to feed, extensive management can grow plants, so if there are novice friends who want to experience the fun of raising flowers, sunflower will be a good choice.