Delphinium or Speronella
The Delphinium are perennial or annual plants, the species are many, a few hundred, spread a little throughout the northern hemisphere and in Africa; in the garden they mainly grow hybrids, the annual ones are related to Delphinium ajacis, while the perennial varieties are generally crossed with Delphinium alpinum, a species widespread in nature also in Italy.
They produce a dense tuft of large finely divided leaves, or very elegant palmate shaped, bright green in color; from late spring, until the end of summer, a thin stem rises between the leaves which at the apex bears numerous large flowers, usually blue or pink, intensely colored, very beautiful and elegant, also used as cut flowers. A single plant sometimes carries several ears, and the flowering is quite long.
Often they are grown in pots, or in large flowerbeds; generally if placed in the open ground, in the garden, i delphinium they appear more conspicuous if planted in a certain number of specimens.
There are many hybrids, as well as the colors, generally always in shades of blue or lilac, there are also white flower varieties, or with double and double flowers.
They are typical plants of the Mediterranean garden, they love a slightly calcareous soil, even stony and dry, in a sunny place; generally the delphiniums are sown directly at home, because the root system tends not to love being moved or handled.
They are annual plants, however the seeds do not particularly fear the cold, and in general the sowing at the end of winter tends not to guarantee a good flowering in the new seedlings; therefore in general they are sown directly in the autumn, when the summer heat has given way to a more humid and cool climate. In fact i delphinium Annuals often tend to self-seed, and although they are plants that completely dry up in the cold, the following year we will find new seedlings in the flowerbed, generated from the seeds of the previous year.
If we fear that in the area where we live the winter climate is excessively harsh we sow the annual delphiniums in autumn in small pots, which we will keep in a cool place sheltered from frost: in the spring we will place the seedlings in the ground, taking care to keep the bread intact of land that is around the roots.
The plants of Larkspur they are not very demanding, they may need watering in case of prolonged drought, but generally they are satisfied with the water naturally supplied by bad weather; we are going to water the young seedlings in particular, in case the spring is particularly dry.