Indoor Herb Garden Success: Light, Soil, Containers, and Companion Planting

Fresh herbs all winter? A sunny windowsill and a few principles make it easy. Mimic outdoor conditions indoors.

Setup Essentials

• Light: 4-6 hours direct sun. Supplement with grow lights 3" above plants if needed. Hot climates: shade midday. Cold climates: insulate from cold glass.
• Containers: 6-12" deep. Up-pot by 1" increments. No stones at bottom (wastes root space)—use mesh over drainage hole.
• Soil: Premium potting mix + organic fertilizer. Add perlite if too dense. Liquid feed if growth stalls.
• Water: Room temp. Moist but not wet. Water meter helps.

Companion Planting Groups

• Italian: Sweet basil, Italian parsley, oregano, marjoram, thyme
• Scented: Lavender, rose geranium, lemon balm, lemon thyme, pineapple sage
• Salad: Garlic chives, rocket, salad burnet, parsley, celery
• French: Tarragon, chervil, parsley, chives, sage

Critical Isolation Rule

Mints, oregano, lemon balm, bee balm—pot separately. They invade everything.

Harvest to Thicken

Snip often once established. Regular cutting = bushy, productive plants. Acclimate gradually, then enjoy fresh flavor all winter.