Days to Germination:10-15 days
Platycodon grandiflorus. Platycodon can be direct-sown outdoors or started indoors 4 to 8 weeks before transplanting outside after the threat of frost has passed. Prepare planting site in garden in full to partial sunlight with rich, well-draining soil. Sow seeds on top of soil, leaving seeds uncovered but pressed firmly onto the soil surface, as light aids germination. Provide even moisture and strong light during germination. Harden off the seedlings by gradually acclimating them outside. Thin or transplant the seedlings 12" to 18" apart. It will not flower until its second year, but once it does, stand back! Its heavily flower-laden stems may need staking. This blue cut flower should be harvested when 2 to 3 flowers open on an individual stem. Flame-sear cut ends before putting in water. Summer flowering. Height: 18" to 24".