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When and How to Properly Prune Rosemary So Your Plants Stay Healthy

Rosemary is great for an herb garden thanks to its fragrant and gentle nature. But like all evergreen shrubs, rosemary needs repeated pruning to help maintain the plant and keep it growing healthy. “With a plant like rosemary, whenever you make a cut above a leaf node, the plant will produce...

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Rosemary is great for an herb garden thanks to its fragrant and gentle nature. But like all evergreen shrubs, rosemary needs repeated pruning to help maintain the plant and keep it growing healthy.

“With a plant like rosemary, whenever you make a cut above a leaf node, the plant will produce two new stems from that cut,” Annette Hird, gardener at Easy Urban Gardens, says. Hence, pruning rosemary helps the plant grow new leaves.

But finding the right balance in terms of pruning is crucial. We chatted with an expert gardener to find out when, why, and how to prune rosemary. To keep this plant thriving in your herb garden, follow these helpful tips.
Why Should You Prune Rosemary Plants?
It’s important to prune rosemary because the plant can overgrow on one side, creating an uneven-looking shrub that leans woody in appearance.

“Like any other perennial, rosemary benefits from pruning to keep the plant compact, bushy, and prevent it from becoming too woody,” Hird says.

But also, pruning can encourage growth. Every time you cut above a leaf node, rosemary will produce more stems, resulting in an overall bigger and healthier plant.
When Should You Prune Rosemary Plants?
Rosemary responds best to pruning after it's done flowering. This can vary depending on your region and climate. Hird personally prunes her rosemary plants in early spring since they tend to flower over winter.

However, it's important to not prune rosemary in late winter, especially during frost. This is because new growth needs some time to mature before winter snow. If the plant doesn’t harden in time, the plant will become too cold and could die from exposure.

The safest time to prune is during the warmer months in summer. As long as you follow these general guidelines, you can prune your plant on and off throughout the year to use in recipes.

“With it being an herb, you’re going to be snipping off sprigs at different times anyway,” Hird says.

How to Prune Rosemary Plants
Follow these steps to ensure you are pruning your rosemary plant right.

Evaluate Plant
Evaluate your plant’s overall look and determine where the plant is overgrowing. Then, Hird recommends cutting back any branches that are growing outside the general framework of the plant. Cut the overgrown areas of the plant, working your way around your rosemary to shape it as you like.

Cut Away Damaged Areas
While trimming, cut away broken or diseased sections of the plant. Just be sure to cut below the damaged areas. If you cut into the wood of the plant, these areas will not grow back, and you will be doing more harm than good.

Help Its Growth
If your goal is to make your plant smaller, this is the time to cut the taller sections of the plant.

“For tall upright branches, cut them back by about a third to reduce the height,” Hird says. It's important to cut back a set of leaves or growth points since this helps with the continued growth.

For branches that you haven’t cut, remove a short section above a leaf node. This will again encourage more growth later.

How to Prune Young Rosemary Plants
Still in their early growth stages, younger rosemary plants can easily be shaped into topiaries or trimmed lightly to encourage faster growth.

Prune After Flowering
Prune your rosemary in spring to early summer after it flowers. You don’t want to prune the plant too early because this could cause undue stress on the plant, as it's actively maturing.

Cut Above the Leaf Node
Be sure to cut just above a leaf node.

“This is known as tip pruning. You just snip off the very tips of each branch to promote new growth,” Hird says.

Shape Plants
It's easy to shape younger rosemary plants into topiary spheres or hedges. If you like to shape your rosemary shrub, prune the stems a bit shorter until the plant takes the shape you want.

Preserve Some Cuttings
Save a few cuttings if you would like to propagate more rosemary plants. Younger rosemary plants, not older ones, are the easiest to propagate, as they are already actively growing all the time.

Dip the cut end into a rooting hormone and plant the rosemary cutting in a pot to root.

Use Rosemary
Alternatively, if you don’t wish to plant more rosemary, this would be a great time to sample the plant in your recipes. Young, tender rosemary stems tend to be the most flavorful, adding the sweetest flavors to your dishes if you cut the sprigs of rosemary early in its life.

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