Thrives in any fertile, humus rich, moist soil in full sun or part shade. Plants will benefit from good air circulation and from watering in extended dry spells. Water at the base if necessary, rather than over the leaves to avoid issues with mildew.

Support with bamboo canes, brushwood or ring stakes in exposed areas before the flowers appear. Phlox are greedy plants, so apply a mulch 5-7cm (2-3in) deep of well-rotted garden compost or manure in early spring. Deadhead spent flowers to prevent reseeding.

If the leaves show signs of powdery mildew, cut down to the ground and dispose of the affected foliage, but do not compost it. Clear away the debris around the plant to reduce the chances of reinfection. Cut down to the ground in autumn, and lift and divide large clumps in autumn or spring.