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March is the ideal time to prepare your garden for the growing season, especially for perennial herbs in Zone 7. Trimming back these herbs not only promotes healthy growth but also helps prevent disease and encourages a lush, vibrant garden. Knowing which herbs to prune and how to do it can make a significant difference in your garden’s success this year.
Why Trim Perennial Herbs in March?
Trimming perennial herbs in early spring allows plants to recover from winter dormancy and stimulates new growth. It also removes any damaged or dead stems that could harbor pests or diseases. Proper pruning can improve airflow around plants, reducing the risk of fungal infections and encouraging a more abundant harvest during the growing season.
Herbs to Trim Back in Zone 7
- Mint
- Oregano
- Thyme
- Sage
- Lavender
- Chives
- Rosemary
Mint
Mint tends to spread aggressively. In March, cut back the old stems to about 2 inches above the soil. This encourages fresh, vigorous growth and prevents it from becoming too woody or leggy.
Oregano
Trim oregano by removing any dead or damaged stems. Cut back about one-third of the plant to promote bushier growth and better air circulation.
Thyme
Prune thyme by cutting back the woody stems to encourage new, tender growth. Be careful not to cut into old wood, as it may not regrow.
Sage
Remove any winter-damaged or dead stems from sage. Lightly trim the remaining growth to shape the plant and promote healthy foliage.
Lavender
In March, prune lavender by cutting back about one-third of the plant, focusing on removing spent flower stems and any woody growth. Avoid cutting into old wood to prevent dieback.
Chives
Chives benefit from a light trim in early spring. Cut back the foliage to about 2 inches above the soil, encouraging fresh, tender growth for the season ahead.
Rosemary
Prune rosemary by removing any dead or damaged branches and trimming lightly to shape the plant. Avoid cutting into old, woody stems, as they may not regrow.
Tips for Pruning Perennial Herbs
- Always use clean, sharp tools to make precise cuts.
- Remove only about one-third of the plant at a time to prevent stress.
- Dispose of cuttings properly to prevent disease spread.
- Avoid pruning during extreme cold snaps to protect new growth.
- Research specific herb needs, as some may require different pruning techniques.
By following these guidelines, you can ensure your perennial herbs in Zone 7 are healthy, vigorous, and ready to thrive throughout the growing season. Happy gardening!