The species and varieties of mint (Mentha spp.) are very hardy perennials that are simple to identify not just because of their fresh and spicy scent but because all members of the mint genus have opposite leaves and square stems. The long stems grow upward and then flop over and root to spread. Its small white or purple summer-blooming flowers attract bees, butterflies, and other pollinators. Mint plants have a fast growth rate and should be planted in the spring after the threat of frost has passed. Mint is toxic to animals when ingested.
|Botanical Name||Mentha spp.|
|Plant Type||Perennial, herb|
|Size||12–18 in. tall, 18–24 in. wide|
|Sun Exposure||Full, partial|
|Soil Type||Loamy, moist, well-drained|
|Soil pH||Acidic, neutral|
|Hardiness Zones||3–11, USA (depends on species)|
|Native Area||North America, Africa, Australia|
|Toxicity||Toxic to pets|
Watch Now: Caring for and Growing Mint Plants
How to Plant Mint
Since mint is an aggressive ground cover, keep it separated from your regular garden beds or the plants will steal nutrients. If you plant it in pathway crevices and between rocks areas in high traffic areas, the mint will release its aromatic scent when the leaves are stepped on and crushed.
When to Plant
Plant mint outdoors in the spring after the threat of frost has passed. The mint will benefit from springtime rainfall.
Selecting a Planting Site
When planting mint in the ground, choose a place where it can spread without causing any problems. Mint fares best in a damp, moist area with well-draining soil, but also in a spot that's in either full sun or part shade. The plant favors fertile soil enriched with compost.
Spacing, Depth, and Support
Plant cuttings or small purchased plants 18 inches to 2 feet apart outdoors. Two plants should be enough to cover a few feet of ground since it grows aggressively. Mint has shallow roots so you won't have to dig down too far, just enough to gently lay the plant and spread its roots.
Your primary maintenance task with mint might be to trim back your plant to prevent its runners from spreading to unwanted places. To further discourage spreading, edge the area where you plant mint with edging that is placed 18 to 24 inches deep into the soil.
Mint Plant Care
Mint plants prefer part shade, though they will grow in full sun if you water them frequently. Still, it's best to protect them from strong afternoon sun. Mint also can survive in fairly shady conditions, though it might be leggy and not produce as many or as flavorful of leaves.
Mint can adapt to most soil types, but it prefers a rich soil with a slightly acidic to neutral pH. Good soil drainage also is essential. Mint plants like water, but waterlogged soil can rot their roots.
Water your mint during dry spells to keep the soil lightly moist. Maintaining lightly moist but not soggy soil is best for mint. If the soil feels dry about an inch down, give your plant some water. If you notice the foliage of your mint wilting, that's typically a sign the plant needs more moisture. It's best to water your mint in the morning, so it has plenty of moisture once the heat of the day hits.
Temperature and Humidity
Temperature tolerance depends on the species you are growing, but in general mint plants are widely adaptable. For example, peppermint (Mentha piperita) is very cold hardy and able to withstand the cool temperatures in USDA hardiness zone 3. Spearmint (Mentha spicata) handles the heat well and can grow in zone 11.
Moreover, mint plants might struggle in low humidity. If you are growing your mint indoors, increase humidity by misting the plant between waterings or set the container on a water-filled tray of pebbles. This is especially necessary during the dry winter months.
And feed it during the growing season (spring to fall) if you have nutrient-poor soil. If you already have rich garden soil, you likely won't have to give your mint any supplemental fertilizer. Container plants and plants grown in nutrient-poor soil will benefit from feeding with a balanced, all-purpose fertilizer throughout the growing season, starting in spring when the plants emerge. Follow label instructions.
Types of Mint
There are many types of mint that come in a range of appearances and flavors. They include:
- Mentha piperita: Peppermint features a sweet, minty flavor and grows in USDA zones 3 to 11.
- Mentha × piperita f. citrata 'Chocolate': Chocolate mint, a first cousin of peppermint, has leaves with a minty-chocolate flavor and aroma.
- Mentha spicata: Spearmint is excellent for flavoring teas and salads and is one of the better mints to use as a landscape ground cover. It grows in zones 5 to 9.
- Mentha piperita citrata: Orange mint is one of the tangiest of the fruit-flavored mints. It grows in zones 4 to 11.
- Mentha suaveolens: Apple mint combines the flavors of apple and mint. It grows in zones 5 to 11.
- Mentha suaveolens variegata: Pineapple mint is a variegated offshoot of apple mint. It grows in zones 6 to 11.
Mint vs. Lemon Balm
Lemon balm is part of the mint family, but it tastes and smells different than other typical types of mints. However, it looks like an oversized mint plant so it is often mistaken for mint. It has a more of a lemony scent but with a twist of mint. Lemon balm also has larger leaves and grows taller than mint.
You can start harvesting mint leaves once the plant has multiple stems that are around 6 to 8 inches long. This should take about two months if you are growing plants from seed or less time if you buy nursery plants. Mature mint can be harvested in summer and fall before the shoots die back. Do not harvest more than a third of a plant at once, as taking any more can weaken the plant.
Snip sprigs and leaves as needed. If you don't harvest your mint regularly, it will benefit from a shearing mid-season. At some point, you will probably notice the stems getting longer and the leaves getting shorter. That is the time to cut the plant back by one-third to one-half. This will encourage it to send out fresh new foliage again with good-size leaves.
How to Grow Mint in Pots
Mint will readily grow in containers. An unglazed clay container with ample drainage holes is best because it will allow excess soil moisture to escape through the holes and the container walls. Use a quality potting mix, and make sure to keep the soil moist but not soggy.
Be mindful about where you place the container, as long stems touching surrounding soil might take root. Growing it on a patio or paved area is ideal. Place a double layer of landscaping cloth inside the pot over the drainage holes to prevent the roots from sneaking out of the container and into the ground.
Mint prefers to be a ground cover. Pruning back the stems also makes for a bushier and more attractive growth habit. To relieve yourself of major pruning maintenance, grow your mint in a confined location, such as in a pot or between paved areas.
Propagating mint by cuttings is a simple, cost-effective way to create new plants. Propagation is best done in the late spring to early summer when the plant is actively growing and before it has bloomed. Here’s how:
- Use sterilized scissors or pruning shears to cut a healthy piece of stem 4 to 6 inches long.
- Remove the leaves from the lower half of the stem.
- Place the stem either in a container filled with water or a small pot filled with moistened potting mix. Put the container in bright, indirect light.
- When rooting in water, change the water every few days to keep it fresh. Once roots grow to a few inches long, plant the cutting in soil.
- When rooting in soil, water to keep the soil lightly moist.
- The rooting process takes a couple of weeks. You’ll know roots have formed when you can gently tug on the stem and feel resistance. After that, you can replant the mint in the garden or another container if you wish.
How to Grow Mint From Seed
Sow seed outdoors in the late spring once there's no danger of frost, or start seed indoors about eight to 10 weeks before your area's last projected frost date. It's important to note that some mint varieties are hybrids and will not grow true from seed.
- Lightly cover the seed with soil.
- Keep the soil moist until the seed germinates, which takes around 10 to 15 days.
- Seed-grown plants should reach harvestable size within two months.
Potting and Repotting Mint
Once your container of mint becomes root-bound and you see roots popping up above the soil, it's often simplest to take a cutting and start a new plant rather than repotting. An old plant won't have the best minty flavor.
It's pretty hard to kill a mint plant, even in the winter. If you have mint planted outdoors, trim them low to the ground, cover with leaves or mulch (some gardeners use an old sheet), and let them alone until springtime. Take potted mint indoors before the threat of frost to be overwintered. Put the containers in bright light, water consistently (but do not water until soggy), and check for pests.
Common Pests and Plant Diseases
Mint plants can sometimes contract rust, which appears as small orange spots on the undersides of leaves. Use a fungicide, and try to allow plants to dry between waterings.
Does mint prefer sun or shade?
Mint grows best in partial shade. It can tolerate morning sun, but strong afternoon sun can wilt the foliage.
Are mint plants easy to care for?
Mint plants require little maintenance to keep them healthy and vigorous.
How fast does mint grow?
Mint grows quickly, reaching a harvestable size from seed in about two months.