From our point of view, the most critical factor is the architecture of our root system. Mint (Mentha spp.) is a vigorous, spreading plant that grows via rhizomes—underground stems that constantly seek new territory. Therefore, a wide, shallow pot is vastly superior to a deep, narrow one. A pot that is at least 12 inches in diameter and 8-10 inches deep provides the horizontal real estate our roots crave for expansion. This space allows the rhizome network to develop properly, supporting the lush, leafy growth you desire. Furthermore, the pot must have exceptional drainage. Our roots are highly susceptible to rot in stagnant, waterlogged conditions. A container with multiple drainage holes at the bottom is non-negotiable; it allows excess water to escape, ensuring our roots have access to both moisture and oxygen, which is essential for our health.
The material of the pot directly influences the soil's moisture and aeration, two elements we are very sensitive to. While glazed ceramic or plastic pots retain water for longer, they can often retain too much, increasing the risk of root rot. From our perspective, an unglazed terracotta or clay pot is the ideal choice. These materials are porous, allowing the walls of the pot to "breathe." This breathability helps to wick away excess moisture from the soil, promoting evaporation and preventing the soil from staying soggy. It also facilitates better gas exchange for our roots. If you choose a plastic pot for its lightweight properties, you must be exceptionally vigilant with your watering routine to compensate for its lack of permeability.
We do not thrive in heavy, dense garden soil, which compacts easily and suffocates our roots. The optimal growing medium for us is a lightweight, well-draining potting mix that can retain moisture without becoming waterlogged. A high-quality, all-purpose commercial potting soil is an excellent base. However, to perfect it for our needs, we recommend amending it. A mixture of two parts potting soil, one part perlite, and one part coir (or peat moss) is ideal. The perlite creates essential air pockets for drainage and root aeration, while the coir or peat moss helps the mix retain a consistent level of slight moisture—which we love—without becoming compacted. This blend provides the perfect balance: it holds enough water to sustain us but drains sufficiently to protect our roots from rot.
While we are not the heaviest feeders in the plant kingdom, we still require a steady supply of nutrients to support our rapid growth. The soil mixture described provides a good foundation, but it will need supplementation. A balanced, all-purpose, water-soluble fertilizer applied at half-strength once a month during the active growing season (spring and summer) is sufficient. It is crucial to avoid over-fertilization, as this can lead to excessive, weak growth and diminish the potency of our essential oils. Regarding pH, we prefer a slightly acidic to neutral soil environment, with a pH range between 6.0 and 7.0 being optimal. Most standard potting mixes fall within this range, so special amendments are rarely needed.
