Delphinium is a genus that includes about 250 species of annual and perennial herbaceous plants originating in Europe, North America and Asia. These are plants consisting of thick clumps of large palmate leaves, finely divided, bright green in color and particularly shiny. In spring and summer they produce long spikes, high up to 100-150 cm, of cup-shaped flowers, simple or double, blue, pink or white. If you cut the stems of withered flowers you can have new spikes in late summer, usually much smaller than the spring ones. There are also cultivars and hybrids with compact or hanging vegetation, with a height of less than 30-40 cm. These flowers are particularly appreciated for adorning and beautifying the gardens of our homes thanks to the delicate and at the same time cheerful colors of their petals.
Delphiniums prefer sunny positions, but can grow without problems even in partial shade, as long as they enjoy the sun's rays for at least a few hours during the day. Sun exposure is of fundamental importance for optimal growth of our delphinium species. As the flower spikes are very high it is advisable to place the plants away from strong winds, otherwise it is advisable to provide the stalks of guardians or to cultivate the species of delphinium close to walls and walls that support our plants. In this way our plants will be guaranteed a steady and easy development.
At the beginning of the vegetative period these plants develop very quickly, sometimes impressively; therefore from March until flowering they need good water quantities, and frequent watering, avoiding however to soak the soil to avoid water stagnation. These would cause rot in the plant. In the following period ensure regular watering, and suspend them in the autumn. From March to September, add fertilizer for flowering plants to the irrigation water every 10-15 days. These essential nutrients for our plants will allow them to grow at their best.
Delphinium, also called Consolida or delphinio, prefers loose, well-drained soils rich in organic matter. If you want to enjoy an abundant flowering of the plant it is appropriate to provide liquid fertilizer to our dolphin species, to be administered at least once a month in the soil.
The species of delphinium they multiply by seed, in late winter or early spring. The perennial species can also be propagated by cuttings or by division of the tufts. Often the delphinium tend to self-seed, and even to hybridize with each other easily.
Delfinio, Consolida - Delphinium: Pests and diseases
As for the diseases and parasites that could attack our consolidate, we must take into consideration the aphids that ruin the buds and the snails that devour the leaves; an environment that is too humid may favor the onset of root rot due to water stagnation. In the most serious cases, if the percentage of humidity is really high, the plant could even die. For this reason, it is advisable to check that the soil is always dry before irrigating our plants.