How to Grow Peppermint Cooler

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Peppermint Cooler

Mentha × piperita 'Cooler'

herb

Peppermint Cooler is a cultivar of peppermint known for its exceptionally cool, refreshing flavor and vibrant green foliage. This vigorous perennial herb produces aromatic leaves with high menthol content, making it ideal for teas, beverages, and culinary applications. It's a hybrid mint variety that combines the culinary appeal of peppermint with enhanced cooling properties.

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Example Peppermint Cooler timeline · Pittsburgh, PA (Zone 6b)

Plant Peppermint Cooler
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Peppermint Cooler
Around May 17

≈ 30 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Peppermint Cooler dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun to partial shade; 6+ hours of sunlight daily for best flavor and vigor

💧

Water: Keep soil consistently moist but not waterlogged. Water deeply 1-2 times per week; more frequent in hot weather. Mints are water-lovers and tolerate wet conditions better than most herbs.

📏

Spacing: 12-18 inches

📅

Days to maturity: 30-45 days for first harvest; continuous harvest after 8-10 weeks

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Planting depth: 0.25 inches for seeds; transplants at soil level. Plant as root divisions or runners 2-3 inches deep.

Soil

Type: Well-draining loamy soil, tolerates a wide range of soil types

pH: 6.0-7.0

Amendments:

Compost or aged manure for organic matter Perlite or sand if drainage is poor Avoid heavy clay without amendment

Growing Zones

Find your zone →

Thrives in zones 3-9; highly cold-hardy and adaptable across most of North America

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b

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Growth Stages

Propagation & Establishment

1-2 weeks

Mints are best started from root cuttings, runners, or transplants rather than seed. New shoots emerge and establish a shallow, spreading root system.

Use container propagation or isolated beds to control spreading. Keep soil moist during establishment. Pinch off flower buds early if using cuttings to encourage rooting.

Vegetative Growth

4-8 weeks

Vigorous foliage growth with square stems (characteristic of Lamiaceae family) and opposite leaves. Plants develop multiple branches and spread via rhizomes.

Pinch back growing tips to encourage bushier growth and prevent early flowering. Ensure consistent moisture and deadhead any early flower spikes. Feed with balanced fertilizer monthly.

Pre-flowering & Maturity

Ongoing through season

Plants reach full size with dense foliage. Flower buds begin to form in leaf axils, signaling peak menthol production.

Pinch off flower buds if focusing on leaf harvest, as flowering diverts energy from foliage. Continue regular harvesting to maintain bushiness and quality.

Flowering

3-4 weeks

Small purple, lavender, or pink flowers appear in terminal spikes. Menthol concentration peaks just before flowering.

Harvest leaves before or just as flowers open for maximum flavor and menthol content. Allow some flowers to remain for pollinator support if desired.

Seasonal Dormancy

Late fall through early spring

In fall, foliage dies back as temperatures drop below freezing. Underground rhizomes survive winter and regrow in spring.

Cut back dead foliage in late fall or early spring. Mulch over rhizomes in zones 3-5 for winter protection. No supplemental watering needed during dormancy.

Companion Planting

Plan your garden →

Plant with:

Tomato Cabbage Cucumber Eggplant Basil Oregano Thyme Chamomile Marjoram

Avoid planting near:

Parsley Fennel Dill Other mints (unless contained) Mint family herbs in uncontrolled settings

Common Pests

Remove infected leaves immediately; improve air circulation; avoid overhead watering; apply sulfur-based fungicide if severe; resistant varieties available
Increase humidity by misting; spray with water to dislodge; neem oil or insecticidal soap; ensure consistent watering
Spray with strong water stream; insecticidal soap; neem oil; encourage beneficial insects like ladybugs
Row covers on young plants; neem oil; remove affected leaves; ensure vigorous growth through proper care
and
Hand-pick in early morning or evening; beer traps; copper barriers; encourage predatory beetles

Uses

🍳

Fresh and Dried Teas & Beverages

Culinary

Peppermint Cooler's exceptional menthol content makes it ideal for brewing refreshing hot or iced teas. The leaves can be used fresh or dried and stored for year-round use in beverages, cocktails, and smoothies. [source]

🍳

Culinary Flavoring

Culinary

Use fresh or dried leaves to flavor desserts, candies, sauces, and savory dishes. The intense cooling sensation enhances the perception of freshness in chocolates, ice creams, and mojitos. [source]

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Digestive and Respiratory Support

Medicinal

Traditional herbalism uses peppermint tea to support digestive comfort, relieve minor stomach upset, and promote respiratory ease. Menthol acts as a natural cooling agent and may support healthy breathing. [source]

🏠

Natural Pest Deterrent & Freshener

Household

Dried peppermint leaves and essential oil derived from the plant naturally repel rodents, insects, and spiders when placed in cupboards, drawers, and storage areas. Also used as a natural room freshener and deodorizer. [source]

🎨

Infusions & Herbal Preparations

Craft

Peppermint Cooler can be infused into oils, vinegars, and alcohol for use in cosmetics, skincare products, and herbal remedies. The leaves retain flavor and aroma well when dried for long-term storage. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Pinch off the top 2-4 inches of stems regularly to encourage bushiness and prolong the harvest season. Best flavor occurs just before flowering; harvest in early morning after dew dries. Cut up to one-third of the plant at a time. Continuous harvesting throughout the growing season promotes better flavor. Harvest until first frost in fall; in spring, wait until new growth is established before heavy harvesting.

Fun Facts

🌱 Peppermint is a sterile hybrid (Mentha aquatica × Mentha spicata) that cannot produce viable seeds, so it must be propagated vegetatively—a characteristic that also makes it more stable as a cultivar.
🌱 The cooling sensation from menthol actually tricks your sensory nerves into feeling cold by activating TRPM8 cold-sensing receptors, creating a perception of temperature drop even at room temperature.
🌱 Peppermint has been used medicinally for over 2,000 years and appears in ancient Egyptian papyri; it was even found in Egyptian tombs as evidence of its long-standing cultural importance.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Cultivar Deadhead Full Sun Hybrid Mulch Partial Shade Perennial Pinch Back Runner Transplant

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