Sage farinacea is a perennial herbaceous plant, native to central-southern America; in many gardens it is grown as an annual. The foliage is low and compact, light green, sometimes slightly blue - gray on the underside of the elongated and serrated leaves; unlike many other species, the leaves of the sage farinacea they do not smell and are thin and smooth. From the center of the head of leaves thin panicles of blue-colored flowers are raised; it is a perennial widely used to create flower carpets, since it produces in quantities from April to May, until the end of summer.
If cultivated as a perennial in winter it completely dries the aerial part, and begins to vegetate late in the spring. There are numerous cultivars, even with white flowers; Dwarf varieties are preferably cultivated, which reach 30-40 cm in height, but there are varieties that exceed 90-100 cm in height.
To have specimens of this genus strong and luxuriant it is advisable to place in a very bright place, struck directly by the sun's rays for at least 4-5 hours a day; in areas with very hot summers it is advisable to cultivate the plant in half-shade, so that, during the hottest days, the sun's rays do not directly hit the plant when the temperatures are very high.
There sage farinacea it can withstand harsh temperatures, some degrees below zero, but often it is grown as an annual, since in winter the aerial part dries up completely.
This plant variety easily withstands even prolonged periods of drought, although it is advisable to water it sporadically during the hottest months, waiting for the ground to dry out between one watering and another and checking that it does not allow the formation of water stagnations that do not benefit the health of farinacea sage.
Every 30-40 days add fertilizer for flowering plants to the water, so that the specimens of this genus can grow at their best.
Being a rather rustic and resistant variety, it is cultivated in any soil, preferring rich and well-drained substrates, which avoid the possibility of water stagnation, a phenomenon that can lead to problems with specimens belonging to this herbaceous species . The preferred soil has calcareous and sandy or neutral soils, while alkaline and heavy substrates should be avoided, which do not guarantee good drainage and proper water circulation.
The reproduction of blue sage plants takes place by seed, in seedbeds, starting from February, using the seed of the previous year; the new shoots must be kept in a sheltered place until the external temperatures reach pleasant values and there is no risk of night frosts; in the autumn season it is possible to divide the clumps of leaves and roots.
Blue sage - Salvia farinacea: Pests and diseases
Generally the plants of this particular variety, due to their characteristics of rusticity and resistance, are not attacked by pests or diseases, thus not requiring special preventive insecticide interventions.