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

Q: Can I grow an avocado tree indoors year-round?
A: Yes, you can! But keep in mind, avocado trees need a lot of light. Make sure to place it in a sunny spot (preferably south-facing) or use a grow light to help it thrive indoors.
Q: Are avocado trees self-pollinating?
A: Yes, avocado trees are self-pollinating, meaning they don’t need another tree to produce fruit. However, having two trees can improve fruit production by increasing pollination.
Q: How much space do I need to plant an avocado tree?
A: Avocado trees need a lot of room to grow—expect them to reach 30-40 feet tall and 20-30 feet wide! Be sure to plant them at least 15-20 feet away from other trees, structures, or fences to give them room to spread out.
Q: What’s the difference between a perennial and an annual medicinal herb?
A: Perennial herbs come back year after year, so once you plant them, you’ll have them for a long time! Annual herbs, on the other hand, only last for one growing season, so you’ll need to replant them each year. Perennials like mint, echinacea, and yarrow save you the hassle of replanting every spring.
Q: How can I harvest medicinal herbs without killing the plant?
A: The key is to harvest selectively! Only take what you need from each plant—this lets it continue to grow and regenerate. For herbs like mint and sage, you can snip off the top leaves regularly to encourage fresh growth. For larger plants like echinacea or valerian, cut back the flowers once they’ve bloomed to keep the plant healthy.
Q: What’s the best way to use my herbs for medicinal purposes?
A: There are tons of ways to use your medicinal herbs! Fresh leaves can be used in teas, tinctures, or poultices. Dried herbs ar
Q: Are early spring blue flowers annuals or perennials?
A: Most early spring blue flowers like Crocus and Iris reticulata are perennials. They come back every year, giving you reliable, beautiful blooms each spring. However, some, like Scilla and Chionodoxa, are typically planted as perennials, too, but depending on your climate, you may treat them as annuals if they don’t come back reliably in colder areas.
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A: Absolutely! If you’re looking to mix things up, there are some gorgeous white flowers that bloom just as early as blue ones. Snowdrops are a classic—these delicate flowers pop up right when the snow is melting. Anemone is another great option; it has simple, pure white blooms that are perfect for adding a clean, crisp touch to your spring garden.
Q: What’s the best way to combine white and blue flowers in my garden?
A: For a stunning contrast, try planting blue ones like Crocus and Iris reticulata next to white ones like Anemone or Lily of the Valley. The combination of the cool blues with the fresh white blooms will create a striking visual impact. You can also create a natural look by planting them in clusters or drifts across your garden.
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'

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

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'

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

Whether you’re growing peppermint from seeds or cuttings, the process is simple and beginner-friendly.
Planting from Seeds:
- 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.
- 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.
- 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.
- Germination: Place the pot in a warm, sunny spot and keep the soil moist. The seeds will typically germinate in about 10-14 days.
- 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:
- Prepare Your Pot: Use a pot with a drainage hole and fill it with a well-draining potting mix.
- 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.
- Plant the Cutting: Once roots have developed, transplant the cutting into the prepared pot.
- Settle the Cutting: Gently pack the soil around the cutting to secure it, ensuring the roots are fully covered.
Growing Requirements for Mint Indoors

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

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

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

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:
- 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.
- Regular Harvesting: By regularly harvesting the leaves, you’ll encourage new growth and prevent the plant from becoming leggy.
- 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.