How To Grow Mint Indoors

Growing mint indoors is a rewarding experience that provides fresh herbs year-round for cooking, tea, and cocktails. As someone who’s been growing herbs indoors for over a decade, I can confirm that mint is one of the easiest and most forgiving plants to cultivate in your home. With its refreshing aroma and versatile culinary uses, indoor mint offers both practical benefits and aesthetic appeal to any kitchen or windowsill garden. Let me walk you through everything you need to know to successfully grow mint indoors.

Choosing the Right Mint Variety

There are numerous mint varieties to choose from, each with distinct flavors and growing characteristics:

Spearmint (Mentha spicata) – Milder flavor, excellent for cooking and mojitos
Peppermint (Mentha piperita) – Stronger menthol content, perfect for teas
Chocolate mint – Has a subtle chocolate aroma with mint undertones
Apple mint – Fruity notes with woolly leaves
Moroccan mint – Traditional mint tea variety with intense flavor

For beginners, I recommend starting with spearmint or peppermint as they’re particularly resilient and adaptable to indoor conditions.

Starting Your Indoor Mint Plant

From Cuttings

Starting mint from cuttings is the easiest and fastest method:

Cut a 4-6 inch stem from an existing mint plant
Remove leaves from the bottom 2 inches of the stem
Place the cutting in a glass of water
Change the water every few days
Wait for roots to develop (usually 2-3 weeks)
Once roots are 1-2 inches long, transplant to soil

From Seeds

While slower, growing from seeds is also possible:

Fill a pot with seed-starting mix
Sprinkle seeds lightly on the surface (don’t bury them)
Mist with water to moisten the soil
Cover with plastic wrap to create humidity
Place in a warm location (65-75°F/18-24°C)
Seeds should germinate in 10-15 days
Remove plastic once seedlings emerge

From Store-Bought Plants

The quickest option is purchasing a small mint plant from a nursery or grocery store. Simply repot it in a suitable container with fresh potting soil.

Choosing the Right Container

Mint is notorious for its aggressive spreading habit. When growing indoors, this means:

Select a container at least 8-10 inches (20-25 cm) in diameter
Ensure the pot has adequate drainage holes
Consider a wider, shallower pot rather than a deep one
Terracotta pots work well as they allow soil to breathe
If using a decorative pot without drainage, place a plastic nursery pot inside

I’ve found that mint actually performs better when slightly root-bound, so don’t worry about providing too much space initially.

Soil Requirements for Indoor Mint

Mint isn’t particularly fussy about soil, but it does have preferences:

Use a well-draining potting mix
Aim for a slightly acidic to neutral pH (6.0-7.0)
Add 20-30% compost for nutrients
Consider mixing in perlite or vermiculite for better drainage

A standard indoor potting mix with some added organic matter works perfectly in most cases.

Light Requirements for Growing Mint Indoors

Mint is adaptable to various light conditions, but for optimal growth:

Place in a spot that receives 4-6 hours of indirect sunlight daily
East or west-facing windows are ideal
South-facing windows may provide too much intense light (use a sheer curtain)
If natural light is limited, supplement with grow lights

I’ve noticed that mint grown in insufficient light becomes leggy with smaller leaves and less intense flavor. Rotate your plant regularly to ensure even growth.

Watering Your Indoor Mint Plant

Mint enjoys consistent moisture but doesn’t like soggy roots:

Water when the top inch (2.5 cm) of soil feels dry to the touch
Ensure water drains freely from the bottom of the pot
Avoid letting the plant sit in standing water
Expect to water more frequently in summer and less in winter
Use room temperature water to avoid shocking the roots

Yellowing leaves often indicate overwatering, while brown, crispy edges suggest underwatering. Adjust accordingly based on your plant’s signals.

Temperature and Humidity Considerations

Mint thrives in moderate conditions:

Optimal temperature range: 65-70°F (18-21°C)
Can tolerate temperatures as low as 55°F (13°C) and as high as 80°F (27°C)
Prefers moderate humidity (40-50%)
Keep away from heating vents, air conditioners, and cold drafts

To increase humidity, place the pot on a tray filled with pebbles and water, ensuring the pot sits on the pebbles above the water line.

Fertilizing Indoor Mint

Mint doesn’t require heavy feeding:

Apply a balanced, water-soluble fertilizer at half strength every 4-6 weeks during growing season
Avoid fertilizing in winter when growth naturally slows
Too much nitrogen can reduce essential oil content and flavor
Organic options like diluted compost tea work well

I’ve found that over-fertilizing often results in lush growth but diminished flavor, so err on the side of under-fertilizing.

Pruning and Harvesting Mint

Regular pruning encourages bushy growth and prevents legginess:

Pinch off the tips regularly to promote branching
Harvest from the top down, cutting stems just above a leaf node
Never harvest more than one-third of the plant at once
Remove any flower buds to maintain leaf production
Harvest in the morning when essential oil content is highest

The more you harvest, the bushier your plant will become. Don’t be shy about regular pruning—it’s beneficial for the plant.

Common Problems and Solutions

Pests

Indoor mint can occasionally attract:

Spider mites – Treat with insecticidal soap or neem oil
Aphids – Rinse off with water or use insecticidal soap
Whiteflies – Use yellow sticky traps and insecticidal soap

Diseases

Common issues include:

Powdery mildew – Improve air circulation and avoid overhead watering
Root rot – Reduce watering and ensure proper drainage
Rust – Remove affected leaves and improve air circulation

Growth Issues

Leggy growth – Increase light and pinch back regularly
Yellow leaves – Usually indicates overwatering or poor drainage
Brown leaf edges – Often a sign of underwatering or low humidity
Pale leaves – May indicate nutrient deficiency or insufficient light

Rejuvenating Older Mint Plants

After 1-2 years, indoor mint plants may become woody and less productive:

Take fresh cuttings from healthy stems
Root these in water as described earlier
Discard or compost the older plant
Plant the new cuttings in fresh soil

This rejuvenation process ensures you always have vigorous, productive mint plants.

Using Your Homegrown Mint

Fresh mint has countless uses:

Culinary – Add to salads, desserts, sauces, and drinks
Tea – Steep fresh or dried leaves for hot or iced tea
Cocktails – Muddle for mojitos, mint juleps, and other beverages
Aromatherapy – Crush leaves for a refreshing scent
Freezing – Chop and freeze in ice cube trays with water or oil
Drying – Hang bundles upside down in a warm, dry place

For the best flavor, use mint leaves fresh whenever possible.

Conclusion

Growing mint indoors is a simple, rewarding project that provides fresh herbs year-round with minimal effort. With the right container, soil, light, and watering routine, you can enjoy abundant harvests of this versatile herb regardless of the season or available outdoor space.

If you encounter persistent issues with your indoor mint plants, consider consulting with a local garden center specialist who can provide advice specific to your growing environment. They can help identify any regional challenges and recommend appropriate solutions to ensure your mint thrives.