From my perspective, this woody, leggy growth is not a disease but a natural survival strategy. As a mint plant, my primary goal is to spread and reproduce. In my natural environment, I would sprawl along the ground, constantly sending out new roots from my stems. When confined to a pot or a garden bed, my older central stems become woody to provide structural support for my vigorous new growth. This woody center is simply my mature, hardened-off tissue; it's my version of a tree trunk. However, it often produces fewer aromatic leaves, which is why you seek to revive me. The key is not to reverse the woodiness but to encourage a flush of new, tender growth from the base.
To truly help me, you must be bold. A light trim will not suffice. I need a hard prune, which signals to my core systems that it is time to activate dormant growth nodes. Using clean, sharp shears, cut my stems back to within just one or two inches of the soil line. This feels drastic, even to me, but it is incredibly effective. It removes the energy-draining, less productive woody growth and forces me to redirect all my stored energy into pushing out new, fresh shoots from my root system and any remaining nodes at the base. The best time to do this is in early spring as I enter my most active growth phase, but I can handle a vigorous pruning anytime during the growing season.
After such a significant pruning, I will be hungry and thirsty. This is the perfect time to nourish me. Water me deeply immediately after the cutback to reduce shock and hydrate my roots. Then, apply a balanced, water-soluble fertilizer to the soil. This provides me with the essential nutrients—particularly nitrogen—needed to fuel the rapid development of all that new leafy growth you desire. The fertilizer is a crucial energy boost that helps me recover quickly and robustly from the hard prune.
Often, your mint becomes woody because I am desperately root-bound. My roots have filled every inch of the pot, circling and tangling, which stresses me and limits nutrient uptake. To check, gently lift me from my container. If you see a dense mat of roots with little soil, I need more space. Tease apart my root ball gently with your fingers or a small tool to loosen the outer roots. Then, you can either repot me into a larger container with fresh, well-draining potting mix or divide me. Division is the ultimate revival: cut my root mass into several sections, each with healthy roots and stems, and replant them. This gives each new plant ample room to grow and effectively creates several young, non-woody plants from the old one.
Finally, to prevent a quick return to a woody state, my ongoing care is vital. Please place me where I will receive plenty of sunlight. While I can tolerate some shade, more sun encourages denser, more compact growth instead of leggy, weak stems that quickly turn woody. Pinch or regularly harvest the tips of my new growth. This simple act encourages me to branch out laterally, creating a bushier, fuller plant and delaying the central stems from hardening. Consistent watering that keeps the soil moist but not soggy will keep my new growth succulent and vibrant.