Sow indoors 10-12 weeks before planting out after last frost date. Keep at 65-70°F until germination occurs, then at 55-65°F.
Direct sow 3-4 weeks before the last spring frost date.
PLACEMENT & CULTIVATION
Attractive to butterflies & bees while also deer resistant, carthusian pink performs well in humus rich, well-drained soils in full sun with little moisture—great for drier areas, such as rock gardens or pathway edges and meadow plantings. If mulching to suppress weeds, be sure to keep it away from the crown of the plant. Deadhead regularly to promote additional flowering. Winter killed stems can be pruned away in springtime. Resow or divide every 2-3 years to renew vigor—in early spring for zones 3-6 or fall in zones 7-9.
Water regularly during first growing season, about 1" per week. Once established, only water during especially prolonged dry periods.
Tolerates most soil pH levels, but neutral to alkaline is preferred. If soil is acidic, apply a handful of lime when planting.
Apply a low-nitrogen granular, organic fertilizer or 2" of compost in springtime.
Diseases & Pests:
Leaf spots can mar the leaves of Dianthus. Space well apart for good air circulation.
When to Cut for Bouquets:
When flowers are halfway opened