Jacob's Ladder (P)
Polemonium caeruleum
Perennial. Hardy in zones 3-9.
Start inside 8-10 weeks before planting out. Cover seed lightly, provide warmth; 21°C (70°F) and seed should germinate in 2-3 weeks. May also be directly seeded into the garden in early spring or early autumn. Transplant in spring into a part shade location, 18" apart. Will only tolerate full sun in areas with cool summers. Prefers cool, moist, rich soil. Water during dry spells. Cut back after flowering. Divide in spring every 3-4 years, carefully as roots are very fragile. Deadhead to prolong blooming. Makes a great cutflower. Self-seeds.
