Days to Germination:10-14 days
Cleome spinosa, Spider Plant. It is best to plant Cleome seeds directly in the garden after the last frost date. They may also be started indoors in a sterile soil mix, 6 to 8 weeks before planting outside. Cleome needs alternating day and night temperatures. Sow thinly and shallowly as light improves germination. Keep soil evenly moist until seedlings emerge. When seedlings are large enough to transplant, be sure to “harden them off” by gradually exposing the plants to the outdoors over a period of 7 to 10 days. Cleome appreciates full sun but tolerates partial shade; the garden bed should be rich, fertile, well-draining soil. Thin or transplant seedlings to 12" to 18" apart and keep the seedlings well-watered and weeded. Mature plants will tolerate heat and drought conditions.