Sweet Herb

Family: Asteraceae Herb

Breathe in the fresh, green lift of Sweet Herb—Stevia rebaudiana—where leaves carry a clean, sweet intensity that feels like sun-warmed mint and soft meadow herbs.

At maturity, the foliage forms an airy, upright mound with tender, velvety leaf texture that’s prized for its concentrated sweetness in herbal infusions and natural sweetening blends. Grow it as a perennial for steady harvests across the season, letting its aromatic leaves become your go-to for refreshing beverages, soothing teas, and gentle flavoring in homemade syrups and pickling brines.

Light: Full SunMaturity: 90 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 14th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Jun 6th
Harvest Begins	Sep 4th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Culinary Notes

Chef's Note

Stevia’s sweetness lands immediately and can turn sharp or drying if you treat the leaves like a normal herb—infuse briefly and taste as you go. Use it to sweeten bright, acidic, or cooling flavors (citrus, mint, ginger) where its clean green lift stays elegant instead of medicinal.

Best Uses

infuse into hot or cold tea for a crisp, sugar-free sweetness
stir into citrusy syrups and glazes to keep flavors bright (go easy—stevia hits fast)
use sparingly in pickling brines for gentle sweetness that doesn’t round the edges
blend into yogurt or fruit marinades where you want sweetness without added bulk

Flavor Profile

clean sweet intensity fresh green, herbal lift light, slightly menthol-like top note velvety leaf bitterness if over-steeped

Kitchen Pairings

lemon zest ginger mint vanilla plain yogurt unsweetened cocoa

Frequently Asked Questions

What pest or disease is most likely on Stevia rebaudiana, and how can I control it?

On stevia, the most common trouble in home gardens is powdery mildew (a white dusty growth on leaves), especially when plants are crowded or nights are humid. Improve airflow by spacing plants and watering at the soil line, then spray a labeled potassium bicarbonate or horticultural oil (follow label directions) at the first sign and repeat as directed. Remove heavily infected leaves to slow spread and avoid overhead watering.

How often should I water Stevia rebaudiana during active growth?

During the main growing phase, keep the root zone evenly moist but not soggy—aim for the top 1–2 inches of soil to dry slightly between waterings. In warm weather, this often means watering about 2–3 times per week, but adjust based on your soil so water penetrates deeply without waterlogging. If leaves droop, water promptly; if stems feel weak and soil stays wet, scale back.

How do I know when Stevia rebaudiana is ready to harvest?

Harvest when plants are established and actively leafy, typically around 90 days after planting, with good leaf mass on multiple branching stems. Cut sprigs or individual leaves in the morning before midday heat; larger flavor is usually best after the plant has formed a full canopy and before flowering becomes heavy. For best regrowth, don’t strip all leaves at once—leave enough foliage for new shoots.