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Late summer is a surprisingly productive moment for gardeners who want fresh flavor before frost. August offers warm soil and steady sun that speed germination and root growth. Whether you want quick annuals for fall salads or hardy perennials to settle in before winter, a few smart plantings now will reward you in weeks.
Why planting herbs in August makes sense
Many gardeners assume August is too late to sow anything new. In reality, the season offers several advantages. Warm soils jump-start seeds. Dry spells can mean fewer slug and fungus problems. And transplants planted now often form roots before cold weather arrives.
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- Faster germination: Heat speeds up sprouts for many herbs.
- Reduced pests: Some insect pressures decline at peak summer heat.
- Good timing for fall harvests: Leaves and seeds mature quickly in cooler weeks ahead.
Fast annual herbs to sow in August for quick harvests
Plant these annuals now and expect usable leaves within weeks. They are ideal for containers or direct-sown beds.
Sweet basil (Ocimum basilicum): classic culinary powerhouse
Basil thrives in full sun and warm conditions, making August an excellent month to sow or pot up. It grows rapidly and will produce flavorful leaves before fall. Remove flower spikes to keep leaves tender.
- Sun: Full sun (6+ hours).
- Soil: Well-draining, fertile mix.
- Sowing: Surface-sow seeds and press lightly; thin to 6–12 inches apart.
- Tip: Pinch tips to encourage bushy growth and delay bolting.
Cilantro / coriander (Coriandrum sativum): best sown as summer cools
Cilantro prefers cooler weather and often bolts in midsummer heat. Planting seed in August lets tender leaves develop as temperatures ease. If you want coriander seeds, let some plants flower later.
- Sun: Morning sun, afternoon shade in hot areas.
- Sowing: Sow shallow, keep soil evenly moist for steady germination.
- Harvest: Cut outer leaves frequently to promote fresh growth.
Dill (Anethum graveolens): dual-purpose leaves and seeds
Dill grows quickly and produces both aromatic leaves and flavorful seeds. An August sowing gives you a fall crop while replacing spring plants that have bolted and faded.
- Sun: Full sun to light shade.
- Sowing: Sow directly; thin seedlings to 12 inches or more.
- Use: Harvest leaves young for salads; collect seeds once flowerheads dry.
Chives (Allium schoenoprasum): mild onion flavor, rapid results
Chives establish easily from seed and respond well to late-summer sowing. Expect clumps to thicken and produce edible foliage by early fall.
- Sun: Full sun to partial shade.
- Soil: Fertile, well-drained soil.
- Care: Snip leaves regularly to encourage regrowth; divide clumps every few years.
Perennials to transplant or start now for long-term herb beds
August is also a practical month to move or pot up perennial herbs. The warmth helps roots expand before winter, improving overwinter survival.
English lavender (Lavandula angustifolia): fragrant, drought-tolerant shrub
Lavender prefers poor, well-drained soils and lots of sun. It’s slow from seed, so transplanting young plants in August gives them a head start. Once roots take, lavender needs little fuss.
- Zones: Typically hardy in USDA zones 5–9.
- Planting: Choose a sunny site with sharp drainage.
- Care: Avoid overwatering; prune lightly after flowering to maintain shape.
Lemon balm (Melissa officinalis): lemon-scented pollinator magnet
Lemon balm settles in quickly and tolerates a wide range of climates. August sowings or transplants get established in warm soil, then strengthen in cool, mild autumn weather.
- Zones: Survives in many climates, often zones 3–9.
- Site: Partial shade to full sun; tolerates heavier soils than lavender.
- Note: It spreads freely; contain it in pots if you want to control its growth.
Practical steps and care tips for an August herb crop
Follow a few simple practices to maximize success when you plant herbs in August.
- Soil prep: Loosen soil and add compost for drainage and nutrients.
- Watering: Keep new seedlings consistently moist until established.
- Mulch: Use light mulch to conserve moisture and moderate soil temperature.
- Containers: Use pots for herbs you plan to bring indoors before frost.
- Succession planting: Sow small batches every 2–3 weeks for continuous harvest.
Quick troubleshooting and harvest pointers
Late summer plantings have specific challenges but are easy to manage with timely action.
- Pests: Check leaves regularly; handpick pests and rinse with water if needed.
- Bolting: For leafy herbs, pinch flowers as they appear to extend harvest life.
- Cold protection: Move tender pots indoors or provide frost cloth as temperatures drop.
- Harvest strategy: Cut early in the morning for peak flavor and aroma.
