Stevia is a sweet herb that is grown for its leaves, which are used as a natural sweetener. It is a tender perennial that is typically grown as an annual in most climates. Plant stevia in a location that receives full sun to partial shade. Stevia prefers well-drained soil that is rich in organic matter. Soil pH should be between 6.5 and 7.5. Plant stevia in the garden after all danger of frost has passed, or start seeds indoors 6-8 weeks before the last frost date in your area. Sow stevia seeds 1cm (½”) deep and keep the soil moist until the seeds germinate, which usually takes 1-2 weeks. Thin seedlings to 30-45cm (12-18”) apart when they are 10-15cm (4-6”) tall. Stevia can also be propagated from stem cuttings, which should be taken in late summer or early fall. Stevia requires consistent moisture throughout the growing season. Water regularly, but do not allow the soil to become waterlogged. Fertilize with a balanced fertilizer every 4-6 weeks during the growing season.
Harvest stevia leaves in the morning when the oil content is highest. Cut off the top 10cm (4”) of the plant and remove the leaves from the stems. Wash the leaves and allow them to dry in a well-ventilated area for 24-48 hours. Once dry, the leaves can be used fresh or dried and stored in an airtight container for later use. Soil Conditions: Well-drained soil that is rich in organic matter. Soil pH: 6.5-7.5. Planting Depth: Sow seeds 1cm (½”) deep. Germination: 1-2 weeks. Height at Maturity: 30-60cm (12-24”) tall. Days to Maturity: 90-100 days. Watering: Consistent moisture throughout the growing season. Sun/Shade: Full sun to partial shade. Spacing after Thinning: Thin seedlings to 30-45cm (12-18”) apart.
