Delphinium elatum
Delphinium elatum
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Delphiniums are tall plants reaching a height of 8 feet when producing tall spikes of blue, purple, lavender, white and pink flowers. Delphiniums prefer a fertile, deeply prepared, well-drained soil. The plant also likes full sun. Remove the first flower shoot as it fades to obtain late season bloom. The plants send out new shoots and remain in flower for some time. Regular watering and fertilizing is needed. Apply no fertilizer later than August. Stake the spikes before the flowers open to prevent injury while the spikes are elongating. Only well grown plants are long lived. Poor soil conditions result in inferior plants. A check in growth, early in the season, causes widely spaced florets on the spikes. Winter protection is suggested.
Propagation is by seed, division and cuttings. Softwood cuttings can be taken in spring. The plants will not divide well. The seed germinates in 2 to 3 weeks at temperatures between 70 and 80 degrees. Darkness is necessary for germination.
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