These 6 herbs will only grow well if you prune them 1 Basil Prune every 1 to 2 weeks: stimulates branching and prevents flowering, which impairs flavor. 2 Mint Prune every 2 to 3 weeks: controls expansion and maintains an intense flavor. 3 Oregano Prune every 2 to 3 weeks: promotes dense, aromatic foliage. 4 Thyme Prune every 4 to 6 weeks: cut back after flowering to regenerate the plant. 5 Parsley Always harvest the outer leaves: ensures continuous production. 6 Rosemary Prune every few weeks: keeps the plant compact and vigorous. Tip: Regular pruning maintains the health, flavor, and productivity of your herbs year-round.