Growing Hosta from flower seed is a simple procedure. Hosta seeds sprout nicely indoors, under normal house conditions, with temperatures running 60 - 70F. Use a "peaty" starter mix and just lightly cover the seed with peat moss.
Keep the Hosta seed moist but not saturated until germination. Sow seeds 8 - 10 weeks before frost season ends. Hosta care includes keeping the plant moist throughout the hot months of the summer. As a rule, they need 1 inch of water every week.