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Mint

Mentha spicata

HerbsPerennialFrost HardyToxic

Vigorous, spreading perennial best grown in containers to prevent it from taking over the garden. Excellent for teas and cooking.

Overview

SunPartial Shade
WaterMediumCalculate watering amount
Height30–60 cm
Spread60 cm
Spacing45 cm
Row Spacing60 cm
Germination10–15 days
To Harvest60–90 days

Companion Planting

Good Companions

CabbageBroccoliPea

Toxicity

SeverityMildly toxic
Toxic toDogs, Cats

Garden mint (Mentha spp.) is non-toxic to humans and widely used as a culinary herb; however, the ASPCA lists it as toxic to dogs, cats, and horses due to essential oils that can cause vomiting and diarrhea if ingested in large quantities.

Planting Tips

LocationFull sun to partial shade (4-6 hours of direct sunlight); grow in containers to prevent aggressive spreading.
SoilMoist, well-drained, fertile soil with a pH of 6.0-7.0; enrich with compost or organic matter.
Sowing Depth0.1 cm
Planting Depth5 cm
WateringKeep soil consistently moist but not waterlogged; water every 2-4 days, providing about 2.5-5 cm per week, preferably with drip irrigation.

1 cm of water per m² equals 10 liters. Use the Watering Calculator for exact amounts.

FertilizingApply a balanced 16-16-16 fertilizer (1 tsp per plant) in early spring; avoid over-fertilizing as it reduces essential oil production.

Care Tip: Contain roots by planting in pots or using buried barriers; harvest regularly to encourage bushy growth and prevent legginess.

Common Pests

Spider Mites (Two-Spotted Spider Mite)

Symptoms: Fine webbing on leaves, yellow or bronzed stippling, tiny moving dots on leaf undersides.

Treatment: Spray with neem oil or a plant-based miticide such as rosemary oil; blast leaves with a strong stream of water.

Prevention: Maintain adequate humidity around plants; avoid water stress and overcrowding; introduce predatory mites.

Aphids

Symptoms: Curled or distorted new growth, sticky honeydew residue on leaves, and sooty mold development.

Treatment: Apply insecticidal soap or neem oil; dislodge aphids with a strong water spray.

Prevention: Encourage beneficial insects like ladybugs and lacewings; avoid excessive nitrogen fertilization.

Thrips

Symptoms: Silvery streaks or stippling on leaves, black speckling (frass), and distorted growth.

Treatment: Spray neem oil or insecticidal soap; remove heavily infested leaves.

Prevention: Keep the area free of plant debris; use reflective mulch to deter thrips; inspect new plants before introducing them.

Common Diseases

Mint Rust (Puccinia menthae)

Symptoms: Dusty orange, yellow, and black pustules on leaves and stems; distorted shoots in spring.

Treatment: Remove and destroy all infected stems and rhizomes promptly; do not compost infected material.

Prevention: Ensure good air circulation; avoid overhead watering; propagate only from disease-free stock.

Powdery Mildew

Symptoms: White powdery coating on leaves and stems; affected foliage turns brown and shrivels.

Treatment: Apply a baking-soda spray (1 tsp per liter of water) or sulfur-based fungicide; remove badly affected leaves.

Prevention: Space plants for good airflow; water at soil level rather than overhead; avoid excessive shade.

Verticillium Wilt

Symptoms: Progressive wilting, yellowing, and browning of leaves, often on one side of the plant; stunted growth.

Treatment: No chemical cure; remove and destroy infected plants along with surrounding soil.

Prevention: Plant in disease-free soil; rotate crops on a 3-4 year cycle; use certified disease-free transplants.