When to plant the delphinium grandiflorum
This article introduces when to plant delphinium grandiflorum and the related experience of delphinium planting time and methods. Keep reading for more information!
Delphinium grandiflorum, also known as pigeon flower, dry bird grass, and thousand bird flowers, belongs to the genus Delphinium in the Ranunculaceae family. It is a perennial herbaceous plant named for its unique flower shape resembling swallows. The flowers are distinctive, with elegant colors and high ornamental value. Moreover, the entire plant and seeds can be used as medicine to treat toothache, and the juice of the stems and leaves can kill insects. Let's take a look at the planting methods of delphinium together!
Methods for planting delphinium seeds
1. Seed collection: The fruit ripening period of delphinium is not consistent. When ripe, the fruit will naturally split, so it should be harvested in a timely manner. Generally, the ripe seeds are harvested 1-2 times in June, and all are selected and harvested in July, dried and dehulled.
2. Planting time: Delphinium can be planted in spring and autumn. If planted in autumn, it must be done by mid-September. However, in areas with higher temperatures in summer, planting should be avoided during the summer vacation.
3. Post-planting management: The suitable germination temperature for delphinium is around 15°C, and the soil temperature should be below 20°C. Germination usually takes about two weeks. In the north, it is usually transplanted in mid-April, when there are 2-4 true leaves, and then planted when there are 4-7 true leaves.
Methods for planting delphinium
1. Planting: When the delphinium seedlings have 2-4 true leaves, they should be transplanted to sunny plots. In the following March, when the seedlings have 4-7 true leaves, they should be planted, which allows for flowering from May to July. When transplanting, avoid planting the seedlings too deep.
2. Watering: Delphinium prefers moisture and is drought-resistant. When watering, water thoroughly and water again when it dries. During the flowering period, water more appropriately to keep the soil from becoming too dry.
3. Sunlight: Delphinium needs adequate sunlight to promote plant growth, especially in winter. It can tolerate some shade but should be placed in a semi-shaded area during summer to avoid strong sunlight.
4. Temperature: Delphinium has a strong adaptability to the climate and prefers cool weather. The best growth temperature during the day is between 20-25°C, and at night, it should be controlled between 3-15°C.
5. Fertilization: During the growing period, fertilize once every half month. Add 2-3 phosphorus and potassium fertilizers before flowering. Keeping the soil moist during the flowering period can extend the viewing period. Also, depending on the growth condition, apply cake fertilizer water 1-3 times per month.
6. Height control: After repotting, use paclobutrazol to control the height of the plant. Apply once with 5000PPM paclobutrazol or 1500PPM of daminozide every half month until the buds appear.
7. Diseases and pests: Common diseases and pests affecting delphinium include black spot disease, crown rot, and chrysanthemum leaf blight nematode. These can be controlled by spraying with a 500-fold dilution of 50% thiophanate-methyl wettable powder.
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