Botanic Garden >> Gardening > >> Garden Articles >> Gardening tips

Growing Basil: Planting, Care, and Harvest for Fresh Herbs All Summer

Basil is a leafy, fragrant annual with bushy habit. Most common: sweet basil. Others: purple basil (less sweet), lemon basil (citrus), Thai basil (licorice). Easy to grow, perfect for Italian dishes, but summer-only—plan accordingly.

Planting

Head start: seeds indoors 6 weeks before last spring frost.
Outdoor site: 6–8 hours full sun; moist, well-drained soil.
After last frost: plant seeds/seedlings ¼ inch deep. Soil ~70°F ideal.
Space 10–12 inches. Height 12–24 inches. Smaller plants: 16–24 inches apart.
Water freely in summer dry spells.
Pinch flower heads as they appear to prolong leaf growth.
For culinary use: clean soil (no harmful fertilizer residues), away from driveways/streets (exhaust residue).
Tomatoes make great basil companions.

Care

Keep soil moist. Hot areas: mulch to retain moisture.
Pick leaves regularly to encourage summer-long growth.
6 weeks post-plant: pinch center shoot to prevent early flowering. If flowers appear, cut them off.
Cold weather destroys plants—harvest beforehand if frost threatens.

Pests and Diseases

Aphids
Various bacterial/fungal leaf, stem, root diseases

Harvest and Storage

After 6 leaves: prune above 2nd set.
Every 6–8 leaves on a branch: prune back to 1st set.
Best harvest: just as plant buds (before flowers bloom).
Fresh = most pungent.
Regular pruning: 12 plants yield 4–6 cups leaves/week.
Best storage: freezing. Quick-freeze: dry whole sprigs, pack in airtight bags.
Drying works but loses flavor. Pinch leaves, air-dry in shade 3–4 days. If not dry, oven on lowest with door ajar. Turn for even drying.