Rosemary (Rosmarinus officinalis) is an aromatic herb that needs to be regularly pruned and harvested to remain healthy and compact. Here’s what you need to know to keep your rosemary thriving.
When Should You Prune Rosemary?
The best time to prune rosemary is in the spring, after it has bloomed. This prevents the plant from becoming too woody and encourages better branching. However, wait until early May to avoid damage from frost. A second pruning in late summer can promote a second bloom. After August, pruning should be stopped to allow the plant to prepare for winter.
How to Prune Rosemary
- Avoid cutting into the woody parts: Never cut back into the woody stems, as this can hinder the plant’s growth.
- Use a sharp knife: This will prevent damage to the plant and reduce the risk of disease.
- Prune regularly: Remove dried, diseased, or overly woody branches, and trim the plant evenly from all sides. For creeping varieties, trim the tips of the stems to encourage side branching.
How to Harvest Rosemary
Rosemary can be harvested from mid-May to late summer. Cut the stems just above the woody parts, making sure to remove whole branches rather than just individual leaves to avoid stressing the plant.
Radical Pruning
If your rosemary has become heavily woody, a radical pruning can be helpful. Cut all stems just above the woody sections to allow new, young shoots to grow from the non-woody areas.
What to Do After Harvesting Rosemary
The rosemary branches you harvest can be used fresh or dried. They are also a great way to propagate the plant through cuttings.