Lavender Growing Guide: Sun, Soil & Pruning

By Emma Johnson · September 26, 2026

Choosing the Right Lavender

Not all lavenders are the same. English lavender (Lavandula angustifolia) is the most cold-hardy (zones 5-9) and best for culinary use. French lavender (L. stoechas) blooms longer but is less hardy. Spanish lavender (L. dentata) has the strongest fragrance and thrives in warm climates.

Sun: Non-Negotiable Full Sun

Lavender demands at least 6-8 hours of direct sun daily. Less sun produces leggy, sparse plants with weak fragrance. In hot desert climates (zones 9-10), afternoon shade prevents scorching. Everywhere else, more sun equals more oil production and stronger scent.

Soil: Drainage Over Fertility

Lavender's number one enemy is wet soil. Plant in sandy, alkaline soil (pH 6.5-7.5) with excellent drainage. If your soil is heavy clay, build a raised mound 12-18 inches high, mixing native soil with gravel and coarse sand at 1:1 ratio. Never add compost or rich organic matter — lavender thrives in lean soil.

Watering: Established Plants Are Drought-Tolerant

Water new plants twice weekly for the first month. After establishment (about 3 months), water only during extended dry spells — every 2-3 weeks is usually sufficient. Overwatering causes root rot, the primary killer of lavender.

Pruning: The Key to Longevity

Prune lavender twice yearly to prevent woody, unproductive growth:

Spring: Cut back one-third of growth as new shoots emerge. Shape into a rounded mound.
After flowering: Remove spent flower stems and trim lightly to maintain shape.

Never cut into old, woody stems — lavender rarely regenerates from bare wood.

Harvesting for Maximum Fragrance

Cut lavender stems when about half the flowers on each spike have opened — this is peak oil content. Bundle 20-30 stems, secure with a rubber band, and hang upside down in a dark, dry, well-ventilated area for 2-3 weeks.