A complete guide on how to take care of your mint plants

Mint is an incredibly easy herb to grow and care for, but it’s important to understand the best conditions if you want it to thrive. By learning about its requirements for sunlight, water, pest control, and more, you can ensure a healthy, productive plant. This detailed guide provides all the gardening tips you’ll need, with each section clearly organised to help you keep your mint flourishing for many years.

How much sunlight does mint need?

Mint does best when it gets enough light, but it’s also adaptable enough to grow in partial shade. For the best results, follow our steps below.

Ideal sunlight: Mint prefers at least 4 hours of direct sunlight per day. If you’re growing it in a garden, aim for a spot that gets morning sun. If you’re growing it indoors, place it near a south-facing window where it can get plenty of natural light.
Too much sun: While mint is a versatile herb, excessive exposure to the sun can lead to wilting or scorched leaves. If you live in a particularly sunny area, consider providing some midday shade, especially during the summer.
Signs of insufficient light: If your mint isn’t getting enough sunlight, the plant may become leggy, with long stems and smaller leaves. To fix this, move the plant to a sunnier location.

How often should you water mint?

Proper watering is one of the most important factors for healthy mint growth. Mint prefers consistently moist soil but can be sensitive to waterlogged roots, so it’s essential to strike the right balance.

Watering method: Mint likes the soil to stay moist, but not soggy. Water your plant when the top inch of soil feels dry to the touch. Be sure to water deeply so the roots get a good soak.
Avoid overwatering: Too much water can cause root rot, especially if your mint is in a pot without proper drainage. Ensure your pot has drainage holes, and avoid letting the plant sit in standing water. If the soil remains too wet, reduce the frequency of watering.
Seasonal frequency: During spring and summer, you may need to water your mint more frequently, or even daily if it’s potted. In autumn and winter, reduce watering as the plant starts to die back in the colder months.
Humidity: Mint also enjoys humidity, so if you’re growing it indoors, consider using a humidifier. This is especially helpful in dry climates or heated homes. However, be sure not to overdo it, as excessive moisture on the leaves can encourage fungal issues.

Protecting your mint from common pests

Mint is generally resistant to pests due to its strong scent, but it’s not immune. If you notice an infestation or signs of damage, here’s some advice on what you can do.

Aphids: These small, sap-sucking insects can weaken your mint. To control aphids, wash them off with a strong stream of water or treat with a bug spray. You can also encourage natural predators like ladybirds.
Spider mites: These tiny pests can cause discolouration on the leaves. They thrive in dry, warm conditions, so carefully mist your plant or increase humidity to discourage them. Neem oil and insecticidal soap can also help deter spider mites.
Slugs and snails: These pests like to munch on mint leaves, particularly in damp, shady areas. Use copper tape around pots or apply diatomaceous earth around the base of plants to keep them away. You can also set up a slug trap if needed.

Providing the right soil for mint roots

Healthy soil is necessary for keeping your mint plant happy and productive. Mint grows best in loose, well-draining soil, but there are some other factors you should consider too.

Soil type: Mint prefers slightly acidic to neutral soil with a pH level between 6.0 and 7.0. You can mix in some compost or organic matter for added nutrients.
Soil drainage: Whether you’re growing mint in a pot or in the ground, make sure the soil drains well. If you’re using a container, ensure it has drainage holes to prevent waterlogging, and use a well-draining potting mix.
Fertilising: Mint isn’t a fussy plant, but it does appreciate occasional feeding. For potted mint, use a balanced, water-soluble fertiliser once every 4-6 weeks during the growing season if you want to see more growth. Be sure to do this after the first year and only if you haven’t repotted into new soil. Avoid over-fertilising, as it can result in weak growth with less flavour.

Dealing with fungal issues in mint

Mint can fall victim to fungal infections, especially in humid or poorly drained conditions. Here’s how to spot and manage common fungal issues.

Powdery mildew: White, powdery patches on leaves, leading to distortion and yellowing. Caused by high humidity and poor airflow. Treatment: Remove affected leaves, increase airflow, and apply a fungicide.
Downy mildew: White leaves with greyish mold underneath. Caused by excess moisture and poor circulation. Treatment: Remove infected leaves, avoid evening watering, and use a fungicide if needed.
Leaf spot: Small, dark spots with yellow halos on leaves. Caused by water splashing on leaves. Treatment: Remove infected leaves and water at the base of the plant.

Prevention tips:

Water at the base, avoiding wetting the leaves.
Ensure good air circulation and avoid overcrowding.
Use well-draining soil and avoid overhead watering.
Prune damaged leaves to reduce fungal spread.

Preparing your mint for the next year

Mint is a perennial herb, meaning it can survive the winter, but it requires some attention to ensure it stays alive during the colder months.

Indoor care: If your mint is in a pot, you can bring it indoors for the winter. Place it near a bright window where it can get light. Mint will go dormant in the winter, so it won’t require as much attention.
Outdoor care: For mint growing in the ground, mulch around the base of the plant to insulate it from the cold. You can also cut back the plant to about 2 inches above the soil line. In the spring, mint will bounce back, and new growth will emerge.
Avoid over-watering in winter: Since mint slows down in winter, you should reduce the watering schedule. Water sparingly, allowing the soil to dry out a little between waterings, or stop watering if your mint is outdoors and in a very rainy climate.

Conclusion

Mint is a versatile, easy-to-grow herb that can survive in various conditions, making it a rewarding and fragrant addition to your garden and kitchen. With just a bit of care and attention, you’ll be able to keep your mint plant healthy for many years.

If you’re ready to learn more, we’ve also provided a guide on how to harvest your mint. Be sure to subscribe to our newsletter for more gardening tips and updates, and follow us on social media for even more inspiration and helpful advice. Happy gardening!