- 1). Prepare a planting spot where the valerian plant will be exposed to partial shade. Although valerian tolerates full sunlight, it does best with afternoon shade. Spade the soil to a depth of 8 to 10 inches, then work 3 to 4 inches of compost or manure into the soil. Valerian is frost-tolerant and can be planted in late winter or early spring.
- 2). Scatter valerian seeds over the prepared soil. Press the seeds into the soil with the back of a rake, but don't cover the seeds with soil.
- 3). Water the area immediately, using a watering can or a hose attachment with a fine spray nozzle. Keep the soil consistently moist.
- 4). Thin the plants by removing the weakest seedlings when the valerian seedlings are about 3 inches tall. Allow 12 to 24 inches between each plant.
- 5). Control weeds around the valerian plants by hand-pulling or hoeing. Weeds will sap moisture and nutrients from the valerian plants.
- 6). Place 1 to 2 inches of organic mulch around the valerian plants. Mulch such as shredded bark or pine needles will control weeds and help to keep the soil moist.
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