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Rosemary

Rosemary
CategoryHerbs
Scientific NameSalvia rosmarinus
DifficultyChallenging

High risk of root rot in Thai humidity. Use terracotta pots with 30% sand mix. Morning sun only.

An aromatic, erect evergreen shrub with needle-like, leathery leaves that are green on top and silvery-white underneath. It has a woody, branching habit and a strong, pine-like fragrance. Known for its luxurious aroma that pairs perfectly with roasted meats, it is also popular as an herbal tea and serves as a natural mosquito repellent.

Cultivation

Sunlight

Partial Shade. Morning sun only—intense noon heat causes stomata closure and stress.

Watering

Water in morning only. Mandatory 'Touch Test'—soil must dry between waterings.

Soil Mix

Thai Survival Mix: 30% coarse sand, 20% rice husk ash, 30% coir, 20% loam.

Fertilizer

Very light feeding. Despises acidic fertilizers.

Challenges

Pests & Diseases

Root Rot (Phytophthora) is the primary killer. Spider Mites in dry season.

Prevention

Use terracotta pots only (breathable). Apply Fosetyl-aluminum preventatively. Mist foliage for mites.

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