Delphinium can be sown in spring and autumn. If it is sown in autumn, it must be sown in mid September. In spring, the flowering time is in September, while in autumn, the flowering time is in May. For the flowers planted in spring, the time should be estimated to avoid blooming in summer.
When the Delphinium grows two true leaves, it needs to be transplanted in a small basin with soil, and then it needs to be replaced once when the seedlings grow up. Due to the lack of root system of Delphinium, it is necessary to take extra care when changing the basin to avoid the slow growth or even death of plants after damaging the root system.
After sowing, the swallowwort must keep the soil moist. The easiest way is to cover some grass, and gradually remove the cover after emergence.
Watering: swallowwort should be watered according to the principle of "wet when dry", keep the soil moist, but avoid ponding. The flower should be watered properly during the flowering period to avoid the poor flower shape caused by over drying of soil.
Fertilization: the eye fertilizer is applied once every half a month during the growth period of Delphinium, and the phosphorus and potassium fertilizer are applied 2-3 times before flowering. The soil keeps moist during the flowering period of Delphinium, which can prolong the flowering period. According to the growth condition of Delphinium, 1-3 times of fertilizer and water were applied every month.
Delphinium is fond of light, and full-time curing is conducive to promoting flowering, preventing plants from growing in vain, and keeping plant shape short and beautiful.
The height of plant can be controlled by Paclobutrazol after changing pot. The specific way is to apply 0.5% Paclobutrazol every 2 weeks.
The seed of Delphinium is mature from August to September. Because the seed of Delphinium blooms first and matures first, and the follicles naturally split after ripening, it is necessary to harvest in time to avoid scattering.
The common diseases of Delphinium are black spot, root neck rot and chrysanthemum leaf blight nematode.
When the disease of Delphinium occurs, it should be removed in time, burned intensively, and sprayed with 50% methyltobujin wettable powder diluted 500 times.
The common insect pests of Delphinium are aphids and noctuids. They are killed by spraying 10% of the insecticidal cream diluted 2000 times.
The whole plant is toxic, the seed is more toxic, mainly contains terpenoid alkaloids. If eaten by mistake, it will cause nervous system poisoning, severe spasm, respiratory failure and death. If you have a bear child's flower friend at home, you must keep the seeds well and put them out of the children's reach.
