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Fall Perennial Herb Care: Revive and Maintain Your Herbs

Fall is the best time to give your perennial herbs a fresh start, especially if you’re gardening in a hot climate. After a long, dry summer, many herbs look tired, but with a little care now, they’ll bounce back and reward you with fresh growth, flavor, and pollinator activity well into winter.

Looking for a complete seasonal overview? Read my post on Fall Gardening in Arizona for tips on vegetables, flowers, and more.

General Fall Care Tips for Perennial Herbs

• For most herbs, trim lightly, avoiding hard cuts: Focus on removing dead or damaged stems and gently shaping the soft growth. Avoid cutting into woody stems unless the plant is dormant.
• Feed the soil, not the plant: Use a light top-dressing of compost and worm castings to rebuild soil life. Avoid heavy fertilizers; most herbs prefer lean conditions.
• Water less often, but deeply: As nights cool, let the top few inches of soil dry between waterings to avoid rot.
• Mind the mulch: Add a thin layer of mulch to insulate roots, but keep it away from the crown of the plant to prevent rot.
• Check on tired herbs: Fall is a great time to repot struggling herbs—this post explains how to repot and divide container herbs step by step.

Specific Perennial Fall Care Tips by Herb

Rosemary

• Lightly shape the plant without cutting into woody stems.
• Improve airflow by thinning if needed.
• Avoid overwatering as the weather cools.
• Learn how to grow rosemary.

Lavender

• Prune only soft green growth, not woody stems.
• Keep mulch and compost away from the crown.
• Use gravel mulch to keep the base dry.
• Learn how to grow lavender.

Thyme

• Trim lightly to where new growth is visible.
• Replace woody or dead plants; fall is a great time to replant.
• Avoid soggy soil and buried crowns.
• Learn how to grow thyme.

Oregano

• Shear back by one-third to encourage basal growth.
• Divide if center is woody and outer edges are vigorous.
• Feed lightly and water when the top few inches are dry.
• Learn how to grow oregano.

Mint

• Cut back to 2–3 inches above soil.
• Remove dead thatch and top-dress with compost.
• Ensure consistent moisture and deep watering.
• Learn how to grow mint.

Sage

• Replace if it shows no green below top few inches.
• Plant new sage in well-draining soil with morning sun.
• Prune in spring, not fall, once it’s established.
• Learn how to grow sage.

Chives & Garlic Chives

• Let bloom in fall if flowering.
• Cut back in late fall or early winter.
• Divide clumps every few years if crowded.
• Learn how to grow chives.

Lemon Verbena

• Tip prune lightly to a pair of buds.
• Expect leaf drop as nights cool.
• Keep protected from frost and reduce water if dormant.
• Learn how to grow lemon verbena.

French Tarragon

• Prune lightly and shape.
• Avoid heavy feeding; prefers lean, well-drained soil.
• Protect from hard frost; treat as semi-tender perennial.
• Learn how to grow French tarragon.

Fall Perennial Herb Care Final Thoughts

A simple fall reset with light pruning, compost top-dressing, and adjusted watering can set your perennial herbs up for months of healthy growth. Take a few minutes now to care for them, and they’ll be stronger and more productive heading into winter and spring.

Additional Perennial Herb Growing Resources

• Browse my Arizona Herb Planting Guide for a visual planting reference.
• Read how to grow herbs in hot summer climates.
• See my top 10 perennial herbs for hot summer climates.
• Want to preserve your herbs? Here’s how to freeze dry them.