Salvia divinorum is a relatively rare plant in this country and most are propagated through cuttings. This has resulted in a Salvia population that is not genetically diverse, according to the Salvia divinorum Research and Information Center. By propagating Salvia divinorum by seeds you are actually helping to expand the genetic base of this plant. Salvia divinorum grows best outdoors in hardiness zones 10 and 11, but may be grown indoors almost anywhere, provided they are misted regularly.
Obtain fresh Salvia divinorum seeds. Seeds may be difficult to obtain unless you already have a flowering plant from which you can collect seeds.
Fill a growing pot or a growing tray with potting mix and dampen it with a misting bottle. Place seeds on the surface of the potting mix and then gently sprinkle 1/8th of an inch of potting soil on top of the seeds. Mist with a misting bottle to keep the potting soil damp but not soggy.
Place the growing pot or growing tray in a well-lit room, but out of direct sunlight. Keep the tray warm (65 to 80 degrees F), and keep the soil misted so it stays damp. In two to four weeks your seeds should sprout.
After sprouting allow your seedlings to receive three to four hours of direct morning or late afternoon sunlight per day and continue misting. Your seedling will be extremely delicate until they are at least 2 inches tall.
Add half strength of an indoor plant fertilizer to the soil once your plants are 2 inches tall.
Repot to a larger container if you plan to keep your plants indoors, or find an area of dappled sunlight outdoors if the temperature does not dip below freezing. Dig a hole twice as large as your root ball and mix potting soil with the garden soil at approximately a 50-50 mix. Keep the soil damp but not soggy.