Here in my area of Texas, from mid summer until at least the end of September, it is very hot, humid and stressful for our plants, even the hardy herbs. (It’s stressful for the gardener, too… but that’s a topic for another discussion!)
One way to help our herbs survive the summer weather is to prune them back so they don’t have so much plant matter to keep hydrated. It is easier for the roots to deliver water to shorter stems and the plant stays looking healthier and prettier, too.
Herbs That May Need Pruning
Mints tend to become leggy by this time in the summer, unless you’ve really been using them a lot to keep their growth compact.
I find this is the perfect time of year to prune the mints back. The intense heat of late summer here in Texas is not kind to mints. So, I like to prune off the long growth and dry it for use in iced teas and allow the plant to put on new growth from the roots. This practice gives the plants some rest from having to pump so much water out to the ends of the stems during the hottest time of the year.
You can prune all the way to the ground, if you like. They’ll come back beautifully, provided you keep the plants watered.
This is also a good time to divide your mints. Whether they’re growing in containers or in the ground, you can dig sections out or dig (or de-pot) the whole plant and see where new little sections have started themselves. Clip those off the main plant and replant or repot them. If you see brown or shriveled roots on the main part of the plant, prune those off, too. Then, repot or replant the main plant- or discard it if it looks tired or if the center of the plant has died out.
Just remember to keep all the plants watered well after pruning, transplanting or dividing and you’ll be rewarded with new growth in just a few weeks. Meanwhile, you have the dried mint for your tea.
By this time of year, my oregano and marjoram have flowered or are flowering. Since these are perennial plants, you can enjoy the flowers and leave them on until they are played out. Flowers from the oregano family bring beneficial insects to your garden and they are pretty. If you like, you can clip them for cut display or use them to flavor your cooking.
There are several types of oregano designated a ‘flowering oregano’ or ‘ornamental oregano’. These are cultivars that have been bred for their more dramatic flowers. Alas, some of the flavor has been lost from these types and they are best used as hardy ornamental landscape plants.
Whichever type of oregano you are growing, after the flowers fade, the plant doesn’t look its best. The stems can become leggy and the spent flowers are rather unattractive. So, now’s the time to prune the flower heads off. You can also prune the whole plant back if it’s gotten too big or needs shaping.
There is rule of pruning which says for best results, don’t prune more than about 1/3 of the growth of the plant. This is true for some plants, like a large Rosemary, roses and other shrubs. But, many herbs can be pruned all the way to the ground when they’ve gotten out of control. Which ones, you might ask? Here’s a list of some common herbs that can be pruned all the way to the ground, whether you’re growing in pots or in the ground:
- lemon balm
- chives/garlic chives