The best way to breed black and purple sunflowers is to use soft and fertile soil, which is less sticky, and peat soil is the best way to sow.
Black and purple sunflowers like sufficient light, so they need to be cultured on the balcony indoors to avoid shading and semi-shading.Insufficient sunshine can lead to soft leaves, stiff stems, small flower discs and other problems.
Black and purple sunflower has strong adaptability to temperature, likes warm environment, and the most suitable temperature for growth is 18-30 .It can grow healthily in the environment not less than 10 C.If the temperature difference between day and night can be maintained within 8-10 C, it is more conducive to the growth of stems and leaves.
In the seedling stage and vigorous growth period, water more, 2-3 times a day, but drainage in time, can not produce water, in order to avoid root rot.Flowering period appropriate watering, do not drought and waterlogging.
Black and purple sunflowers like adequate nutrients, in the growth period of 7-10 days topdressing once.Nitrogen fertilizer is the main fertilizer in seedling stage, and some phosphorus and potassium fertilizers are added after buds appear, which can help flower development and facilitate flowering.Appropriate fertilizer supplementation can prevent branches and leaves from being thin and yellow.
The occurrence of plant diseases and insect pests can be effectively controlled by timely spraying insecticides during the breeding process or carrying out pest control treatment on the soil before planting.If pests are found, they should be dealt with immediately to avoid further damage to plants.
