Should I Prune Catnip?
Catnip will grow well in almost any soil but prefers a moderately rich loam that is well-draining. This herb prefers full sun but will tolerate partial shade. Water young plants twice a week but as they establish, reduce watering to once a week depending upon weather conditions. Really, that’s about it with regards to caring for these herbs, with the exception of pruning catnip plants. If you’re asking, “When should I prune catnip?”, or even why, then here’s your answer: Catnip blooms and sets seeds profusely and, as such, is a rather aggressive self-sower. If you do not want catnip all over the place, it is best to prune the flowers as they begin to fade before they go to seed.
How to Prune Catnip Plants
Once the herb flowers, catnip tends to look downright scraggly. Cutting back catnip will restore the plant. Prune after the first round of blooming to encourage a second flowering prior to winter. Then, after the first frost, you can cut the plants down to 3-4 inches (7.5-10 cm.) in height, which will encourage new growth in the spring. Staying on top of catnip pruning is a great way to keep the plant in bounds. Keep in mind, however, that catnip can also be easily grown in containers too.
