When seeds turn brown, or use leaves while green as needed. Fast growing annual. Start seed indoors in early April or seed in early spring. Space 12 in. Prefers protected sunny locations.
Harvest leaves when flowering begins.
Cut plants 4-6 in. above ground. 20-24 Coarse, rough, hairy leaves. Produces light blue flowers in drooping clusters. Seed directly in early spring. Space 12 in.