All posts
arrow-narrow-right
Gardening for Food
arrow-narrow-right
Current article

How to Grow Peppermint Indoors: A Complete Guide to Growing Peppermint and Other Mint Varieties Year-Round

Published on
April 11, 2025
How to Grow Peppermint Indoors: A Complete Guide to Growing Peppermint and Other Mint Varieties Year-Round
Author
Beneficial Insects for Your Garden Q&A

Q: Will all beneficial insects stay in my garden permanently?

Not always. Many beneficial insects are mobile and will move around searching for food, mates, or shelter. However, you can encourage them to stay by planting a continuous succession of blooming plants, offering water and habitat, and avoiding disturbances like over-tilling or spraying chemicals.

Q: Are beneficial insects safe to have around children and pets?

Yes, most beneficial insects are completely harmless to humans and animals. Insects like ladybugs, lacewings, hoverflies, fireflies, and predatory mites do not sting or bite. Even bees and parasitic wasps are generally non-aggressive and only sting when provoked. With proper respect and limited disturbance, they are safe to have in family gardens.

Q: How do I attract beneficial insects to my garden naturally?

You can attract beneficial insects by planting a wide range of pollen- and nectar-rich flowers, especially native species. Herbs like dill, fennel, parsley, coriander, and flowering plants like alyssum, sunflowers, yarrow, and marigolds are particularly effective. Avoid using chemical pesticides, as they can kill helpful insects. Providing water sources and undisturbed shelter, like leaf litter or mulch, also encourages them to stay.

Q: Do I need to buy beneficial insects, or will they come on their own?

While you can purchase beneficial insects (like ladybugs or predatory mites) online or at garden centers, many will naturally find your garden if the environment is right. Planting insect-friendly flowers, reducing pesticide use, and providing habitat can encourage them to come and reproduce on their own.

Q: What’s the difference between beneficial insects and neutral insects?

Beneficial insects directly help your garden by controlling pests or pollinating plants. Neutral insects don’t harm or help—they’re simply present in the ecosystem. It’s important to learn to identify both so you don’t accidentally eliminate harmless or helpful species.

Q: Can I have both bees and children or pets in the same garden safely?

Absolutely. Bees, including honeybees and native bees, are gentle and non-aggressive when left undisturbed. They typically only sting in self-defense, such as when their hive is threatened. Educating children not to swat or disturb bees and planting flowers away from play areas helps ensure a peaceful coexistence.

How To Get Rid Of Snails In Your Garden Q&A

Can I use salt to kill snails in my garden?

Although salt can kill snails by dehydrating them, it is not recommended for garden use. Salt can damage the soil, harm plant roots, and affect beneficial soil organisms. It’s best to stick to safer alternatives like diatomaceous earth, beer traps, and crushed eggshells that target snails without harming your garden’s ecosystem.

Are coffee grounds safe to use for pest control?

Yes, coffee grounds are a popular natural method to deter slugs and snails. The texture and caffeine content are unpleasant to these pests. They’re generally safe for most plants and can even enrich the soil with nutrients. However, they may increase soil acidity, so use them in moderation around plants that prefer neutral or alkaline soil.

Do snails and slugs harm all types of plants?

Snails and slugs prefer soft, tender vegetation, especially young seedlings, lettuce, spinach, basil, and strawberries. However, if populations are high, they may begin feeding on a broader range of plants, including root vegetables and even woody stems. Slugs eat a variety of plant tissues and can devastate a garden if left unchecked.

How do copper barriers work against snails?

Copper reacts with the slime that snails and slugs produce, causing a mild electric shock that repels them. This won’t harm the pests, but they will avoid crossing copper surfaces. Copper tape can be wrapped around planters, garden beds, and containers to form a safe and effective barrier.

Can I keep slugs and snails out of a vegetable garden without chemicals?

Absolutely. Many gardeners successfully keep slugs and snails away using natural methods like handpicking, setting traps, spreading crushed eggshells or coffee grounds, and using copper tape. Additionally, improving garden drainage and watering in the morning will make your vegetable garden less attractive to these pests.

Plants That Attract Dragonflies Q&A

Q: Do I need a big pond for dragonflies?

No—small container ponds with a few aquatic plants can still attract dragonflies and support larvae development, saving space while achieving great results.

Q: Will these plants eliminate all mosquitoes?

While no single solution fully removes mosquitoes, combining dragonfly habitat with standing water management and these plants can significantly reduce mosquito populations.

Q: Are these plants all native?

Most—like swamp milkweed, arrowhead, and blue flag iris—are native and ecosystem-friendly. Always check local rules, especially before planting aggressive species like cattails.

Advertisement

If you're a fan of fresh, fragrant herbs, growing mint indoors can be a rewarding and satisfying experience. Whether you're looking to cultivate peppermint for its cooling aroma or experimenting with other mint varieties, having fresh mint at your fingertips year-round is both convenient and enjoyable. In this complete guide, we’ll take you through the essential steps of growing mint indoors, from selecting the right varieties to understanding their care needs. Whether you're new to gardening or a seasoned plant lover, this guide will help you successfully grow mint in the comfort of your own home.

What Is Peppermint?

Peppermint (Mentha × piperita) is a hybrid herb, known for its refreshing, aromatic flavor and distinctive, cooling sensation. It's widely used in various culinary dishes, beverages (such as mint tea and mojitos), and as a flavoring in products like candies and gums. Peppermint is also known for its medicinal uses, including soothing digestive issues, alleviating headaches, and even acting as a natural remedy for muscle pain when used in oils. It is prized for its essential oils, which have antiseptic and anti-inflammatory properties.

  • Plant Type: Herb (Grows every year)
  • Size: 18-24 inches tall, 18 inches wide
  • Soil Type: Well-draining, not too wet
  • Soil pH: Slightly acidic to neutral (6.0 – 7.0)
  • Bloom Time: Mid to late summer
  • Hardiness Zones: Zones 3-8 (grows in temperate areas)
  • Native Area: Europe, Asia, and North America
  • Toxicity Level: Safe for humans and pets (but peppermint oil should be used carefully around pets)

Best Peppermint Types

While there are many varieties of mint, some types of peppermint are better suited for indoor growing or particular culinary uses:

Mentha × piperita 'Mitcham'

Mentha × piperita 'Mitcham' closeup outdoors thriving

Often considered one of the most popular and robust peppermint varieties, 'Mitcham' is known for its intense, sharp flavor, which makes it a favorite for teas, cocktails, and culinary dishes. This variety thrives well in both indoor and outdoor conditions, making it a versatile option for gardeners. Its leaves have a smooth texture and are dark green, often appearing glossy. Its strong flavor is especially prized in herbal teas like peppermint tea and for refreshing cocktails like mojitos or mint juleps.

Mentha × piperita 'Black Mitcham

Mentha × piperita 'Black Mitcham thriving outdoors
Credit to: Terry Howes
Link: https://www.flickr.com/photos/tlhowes/8881634124

A closely related variety to the standard 'Mitcham', 'Black Mitcham' is known for its darker green leaves and deeper, more complex flavor profile. This type has a slightly more intense menthol aroma, making it a favorite for medicinal uses, such as teas or extracts intended to soothe digestive issues or alleviate headaches. Its flavor is also sought after in culinary dishes that need a more pronounced peppermint taste. The plant itself is easy to grow, with a spread of vigorous growth, making it ideal for gardeners seeking a hardy peppermint variety for various applications.

Mentha × piperita 'Chocolate Mint'

Mentha × piperita 'Chocolate Mint' thriving outdoors
Credit to: Downtowngal
Link: https://commons.wikimedia.org/wiki/File:Chocolate_mint_plant.jpg

This variety is a unique twist on traditional peppermint, with a gentle chocolate undertone that adds depth to its flavor. 'Chocolate Mint' is particularly loved for its use in desserts, such as chocolate-mint brownies, ice creams, and novelty teas. It provides a sweet, minty flavor with an extra layer of richness that pairs beautifully with chocolate-based treats. This variety is also aromatic and pleasant to grow indoors in pots or small garden spaces, offering gardeners a visually appealing and flavorful option for both culinary and ornamental use.

How to Plant Peppermint: Step-by-Step Guide

How to Plant Peppermint: Step-by-Step Guide infographic

Whether you’re growing peppermint from seeds or cuttings, the process is simple and beginner-friendly.

Planting from Seeds:

  1. Prepare Your Pot: Fill a small container with a well-draining, loamy potting mix. Mint thrives in soil that’s rich in nutrients but doesn’t retain too much water.
  2. Plant the Seeds: Sprinkle peppermint seeds over the surface of the soil. Gently press them down without burying them, as peppermint seeds require light to germinate.
  3. Cover with Plastic: To create a greenhouse effect, cover the pot with plastic wrap or a clear lid. This will maintain humidity and warmth while the seeds germinate.
  4. Germination: Place the pot in a warm, sunny spot and keep the soil moist. The seeds will typically germinate in about 10-14 days.
  5. Thin the Seedlings: Once the seedlings have grown large enough, thin them out by removing the weaker plants, leaving only the strongest.

Planting from Cuttings:

  1. Prepare Your Pot: Use a pot with a drainage hole and fill it with a well-draining potting mix.
  2. Take a Cutting: Snip a healthy stem with at least two sets of leaves from an existing peppermint plant. Place the cutting in a glass of water and let it root for 1-2 weeks.
  3. Plant the Cutting: Once roots have developed, transplant the cutting into the prepared pot.
  4. Settle the Cutting: Gently pack the soil around the cutting to secure it, ensuring the roots are fully covered.

Growing Requirements for Mint Indoors

Growing Requirements for Mint Indoors infographic

To ensure your peppermint thrives indoors, you’ll need to meet several key growing requirements:

Soil

Peppermint thrives in well-draining, fertile soil that supports its vigorous growth. A loamy mix works best, as it contains a balanced ratio of sand, silt, and clay, providing good drainage while retaining enough moisture for the plant's needs. If your soil lacks good drainage, consider adding perlite or sand to improve airflow and prevent root rot. A slightly acidic to neutral pH (around 6.0 to 7.0) is ideal for peppermint.

Water

Mint prefers consistently moist soil but not soggy conditions. Regular watering is crucial, especially during the warmer months when the plant’s growth is more active. Be sure the soil surface is damp but not waterlogged. To avoid excess moisture around the roots, use pots with drainage holes so that water can escape freely. During cooler months, reduce watering slightly, but always ensure the soil remains moist and does not dry out completely.

Temperature

Peppermint grows best in moderate temperatures between 60°F and 70°F (15°C to 21°C). It can tolerate occasional cooler temperatures but is sensitive to extreme heat. Avoid placing it in areas where it may experience temperature fluctuations, such as near heaters or air conditioners, as these conditions can stress the plant and stunt its growth. If you live in a region with hot summers, consider growing mint in the shade or indoors where temperature control is easier.

Humidity

Mint plants thrive in moderate humidity levels, around 40%-60%. In drier environments, the plant may show signs of stress, such as browning leaf edges. To maintain optimal humidity, consider using a humidifier near the plant or placing a shallow dish of water nearby. Grouping mint with other plants can also help maintain higher humidity levels. In more humid conditions, you can expect a healthier, fuller plant.

Sunlight

Mint requires at least 4-6 hours of indirect sunlight each day to grow strong and healthy. Direct sunlight may scorch the leaves, especially in warmer climates, so place it in a spot that receives filtered light or dappled shade. A windowsill with natural light or a nearby grow light can provide the necessary exposure. If growing mint indoors, make sure it is close enough to the light source to get the required amount of light, but not so close that it becomes overheated.

Maintenance Tips for Peppermint Care

Maintenance Tips for Peppermint Care infographic

Proper care will keep your peppermint plant healthy and thriving.

Fertilizing

Mint is a low-maintenance plant, but providing it with occasional feeding can support healthy growth. During the growing season, which includes spring and summer, apply a balanced, water-soluble fertilizer once a month. Choose a fertilizer with equal proportions of nitrogen, phosphorus, and potassium to promote overall plant health and robust leaf production. Be careful not to over-fertilize, as this can lead to excessive leaf growth that may lack flavor. A light application of fertilizer will encourage steady growth without overwhelming the plant.

Pruning

Regular pruning is essential to maintaining a healthy, bushy mint plant. Trim back the top growth every few weeks to encourage the plant to grow fuller, and remove any leggy stems. Cutting back the plant after flowering is important, as mint tends to become spindly and less productive if left unchecked. Pruning will also prevent mint from becoming overly aggressive by promoting more compact growth and deterring flowering, which diverts the plant’s energy away from leaf production. Additionally, removing flowers ensures a better flavor profile, as mint can become bitter after flowering.

Mulching

Mulching around your mint plant, especially in outdoor gardens, serves multiple purposes. A layer of organic mulch, such as straw or wood chips, helps retain soil moisture, which is particularly beneficial during dry spells. Mulch also keeps the soil temperature consistent, providing a more stable environment for root growth. Furthermore, it acts as a natural barrier to weeds, reducing competition for nutrients and water. Apply mulch around the base of the plant, ensuring it doesn’t touch the stems directly, which could lead to rot.

Potting and Repotting

Mint grows vigorously and benefits from repotting every 1-2 years. Over time, the soil in the pot can become depleted of nutrients, and the plant may outgrow its container. When repotting, select a pot that is slightly larger than the current one to allow room for further growth. Refresh the soil with a nutrient-rich potting mix that provides good drainage. Mint’s roots tend to spread quickly, so providing a larger pot gives it the space it needs to thrive. When you repot, gently trim back the roots if they’ve become too dense or tangled, promoting healthier growth.

Overwintering

If you live in a colder climate and are growing peppermint outdoors, it may not survive the winter temperatures. In this case, dig up the plant in the fall before the first frost and bring it indoors for the winter months. Place it in a bright location with indirect sunlight, such as a south-facing window, and continue watering it regularly, though less frequently than during the growing season. Indoor mint plants can thrive year-round with proper care, including occasional pruning to prevent leggy growth. If growing mint outdoors in a temperate climate, the plant may go dormant during winter and resume growth in the spring.

Common Pests and Diseases for Peppermint

Though peppermint is relatively pest-resistant, it can occasionally fall victim to a few common pests and diseases. Here are some things to watch out for:

Pests

Pests aphids on a stem

Aphids: These tiny pests can cause distorted growth and yellowing leaves. Rinse your plant with water or apply insecticidal soap.

Spider Mites: These can be identified by fine webbing on the plant. Again, wash off the plant with water or use a mild insecticidal soap.

Powdery Mildew: This fungal disease appears as a white, powdery coating on the leaves. Remove infected leaves and treat the plant with a fungicide.

Diseases

leaf disease closeup

Root Rot: Overwatering can lead to root rot, which causes the roots to decay. Be sure to allow the soil to dry between waterings and provide proper drainage.

How to Harvest Peppermint

Harvesting peppermint is easy and can be done once the plant is established. Here’s how:

  1. Pick Fresh Leaves: The best time to harvest peppermint is in the morning, after the dew has dried but before the sun is too hot. Use scissors or pruning shears to snip off the top leaves and stems, leaving the lower leaves to continue growing.
  2. Regular Harvesting: By regularly harvesting the leaves, you’ll encourage new growth and prevent the plant from becoming leggy.
  3. Store the Leaves: Fresh peppermint can be used immediately in recipes, but you can also store it in the refrigerator or dry the leaves for later use.

Frequently Asked Questions and Answers:

Q: What are the best conditions to grow mint indoors?

A: To grow mint indoors, you need to create an environment that mimics its natural habitat. Mint thrives in a bright location with indirect sunlight, so a south-facing windowsill is ideal. The temperature should ideally be between 65°F and 70°F (18°C to 21°C). Use a well-draining potting soil that retains some moisture but allows for proper drainage. Ensure that your mint plant has a drainage hole in the pot to prevent root rot. Regularly monitor humidity levels, as mint prefers slightly humid environments.

Q: How often should I water my indoor mint plant?

A: When caring for your indoor mint, it’s important to keep the soil consistently moist but not soggy. Water your mint plant when the top inch of soil feels dry. This usually translates to watering about once a week, but it may vary based on the humidity and temperature of your home. If you notice the leaves wilting or turning yellow, it may be a sign of overwatering or underwatering. Always ensure that there is good drainage to avoid waterlogged soil.

Q: What types of mint can I grow indoors?

A: There are several types of mint that you can successfully grow indoors. Some popular options include peppermint, spearmint, and even more unique varieties like pineapple mint and orange mint. Each variety has its unique flavor profile and aroma, making them excellent choices for culinary uses. Consider your space and light availability when choosing which mint variety to grow indoors.