Genus of 66 species of herbaceous and suffrutticose plants, annual and perennial, semirust and rustic. Of very variable dimensions, there are dwarf species that do not exceed 10 cm and others that reach a meter and a half. Flox plants originate from North America but have also spread to our territory. The flowers of the Phlox varieties have the particularity of being brightly colored depending on the variety. By alternating the seeding times of the Flox plants, flowers can be obtained all year round.
The ideal soil for Flox is moist, well drained and very fertile, with variations in the amount of peat in relation to the species. It is advisable to fertilize perennial species in April, with mature manure.
occurs by seed in annual species, and by cuttings for perennial species. For the cuttings, 8-10 cm branches are cut in March; the cuttings should be potted when they are well rooted and settled definitively only the following spring You can use root cuttings when the plant is attacked by stem nematodes, using a compound for sowing and keeping the cuttings at 15 degrees until they emit the new shoots.
As for the water needs of the Phlox it is good that the waterings are regular and abundant during the hot season, especially during periods of drought; reduce watering during the other seasons.
Phlox is a rather rustic plant and is well suited to both sun and shady cultivation. Perennial species tolerate winter cold well, the annual species, which are sown in September to obtain an early flowering, will be kept in a greenhouse at 8-10 ° throughout the winter.
Pests and diseases
nematodes cause deformation to the leaves and branches. The only remedy is the elimination of diseased plants. Powdery mildew attacks leaves, especially in varieties grown in greenhouses. It is therefore advisable to provide preventive treatments with specific products that protect Phlox specimens from pests and diseases.
The tall, annual and perennial herbaceous species are suitable for mixed borders and for the production of cut flowers;
P. drummondii, perennial but grown as an annual, is used in flower beds or, in greenhouses, as a spring-flowering pot plant, perennial dwarf plants, generally evergreens, are suitable for rock gardens and dry walls.
Among these species we mention: P. douglasii
Among the annual species P. Drummondii;
Among the perennial species of P. Maculata border.
Cultivation techniques for annual species
they are grown in all well-drained garden soils. The plants are planted in May, in a sunny position. If the withered inflorescences are severed, the flowering period becomes longer. In poor soils it is good to periodically administer a liquid fertilizer. To obtain the flowering in spring under glass, the seedlings sown in September in 8 cm containers are filled, filled with the compost, and then they are transplanted in 12 cm containers and wintered in the greenhouse. at a temperature of 8-10 ° C. Flowering generally begins in March.
Flox - Phlox: Cultivation technique for perennial border species
They are planted in October or February-March in a sunny or partially shaded position, in fertile, moist, and well-drained soil.
Every year, in April, mulching is done with mature manure or compost to keep the soil moist. During dry periods it is abundantly watered, otherwise the plants wither and produce few flowers. Older plants produce numerous weaker branches that must be cut in spring. In October, the dry flowering stems are cut just above ground level, generally these plants need support.