Pink and White Cleome - Spider Plants - 1000 Seeds 5000 Pink and White Cleome Seeds - 3-5 Feet Tall Good cutting flower. Nectar Flower for Monarch Butterflies. Can be cold stratified or started indoors or outdoors. They grow best in full sun; seeds will germinate in 8 to 12 days if temperatures are 70 to 80F. Seeds should be planted 1/8th inch deep and left uncovered. Space 3 inches between seeds, and space 18 inches between rows. Thin to 18 to 24 inches apart when plants are 3 inches tall. Spring and Summer Marde Ross & Company specializes in flowering bulbs and peonies and has been a licensed California Nursery since 1985