How to prune ruellia brittoniana

Late winter to early spring before new growth flushes. Cut all stems back by one-half to two-thirds using clean bypass pruners. In frost-free climates, also trim lightly after each main flush of bloom to tidy the plant.

Annually (hard cut-back); light tidying after each bloom flush. Ruellia simplex (Mexican petunia) benefits from cutting back hard to control its vigorous, spreading habit. Prune stems by up to two-thirds in late winter or early spring to encourage bushy, compact regrowth and prolific summer flowering. Deadheading prolongs bloom but is optional on this free-flowering plant.

Cut all stems back by one-half to two-thirds using clean bypass pruners. In frost-free climates, also trim lightly after each main flush of bloom to tidy the plant.