How to prune catnip

After first flowering (early to midsummer); hard cut in late autumn. Cut all stems back by half to two-thirds just above a leaf node using clean shears. Deadhead spent spikes promptly. In autumn, shear the whole plant down to 5–8 cm above soil.

2 times per season (post-flower cut + autumn cutback). Catnip is vigorous and self-seeds readily if not managed. Cut plants back by one-half to two-thirds after the first flush of flowers to encourage a second bloom and prevent aggressive self-seeding. A final hard cut to a few centimetres above ground in late autumn keeps the clump tidy and promotes strong regrowth the following spring.

Cut all stems back by half to two-thirds just above a leaf node using clean shears. Deadhead spent spikes promptly. In autumn, shear the whole plant down to 5–8 cm above soil.