How to Grow Stevia (Sugar Plant) from Seeds

Overview

Stevia (Stevia rebaudiana), also called candyleaf, is a perennial herb whose leaves are 20–30 times sweeter than sugar substitutes. Popular with home growers because no special processing is needed. Requires well-drained soil, nitrogen fertilizer, and full sun for maximum leaf production. Grows best in warm regions. Harvest early summer through early fall.

Step 1: Prepare Containers

Fill two pots with 7 inches of organically enriched potting soil, leaving space at the top.

Step 2: Select Seeds

Empty seed packet onto a paper towel. Use tweezers to pick the blackest seeds. Place on soil surface ~¼ inch apart.

Step 3: Press Seeds In

Lightly tap seeds into soil with fingertips to secure without burying deeply.

Step 4: Mist Soil

Fill a spray bottle with tap water. Mist until surface is wet but not soggy.

Step 5: Create Humidity Dome

Cover pots tightly with plastic wrap. Poke 4–8 holes with a toothpick for air circulation.

Step 6: Provide Warmth and Light

Place in a sunny location ≥50°F.

Step 7: Maintain Moisture

Remove plastic every other day to mist lightly. When seedlings emerge (7–12 days per Purdue University), remove plastic permanently.

Step 8: Thin Seedlings

Pinch off unhealthy seedlings at base and pull gently. Replant in separate containers or discard if very weak.