Rosemary
Rosemary is an aromatic evergreen shrub with needle-like leaves and blue flowers. This versatile green plant is both ornamental and culinary, adding fragrance to gardens and flavor to dishes.
Rosemary Care Guide
Environment
Rosemary thrives in sunny locations with well-draining, slightly alkaline soil. It prefers dry to medium moisture and good air circulation.
Light
Full sun is essential for robust growth and optimal oil production in the leaves. At least 6-8 hours of direct sunlight daily is ideal.
Temperature
Hardy in USDA zones 8-10. In colder regions, grow in containers to bring indoors for winter or treat as an annual. Protect from frost in marginal zones.
Watering
Allow soil to dry completely between waterings. Once established, rosemary is drought-tolerant and prefers dry conditions. Overwatering is the most common cause of problems.
Humidity
Prefers low humidity and good air circulation. Avoid planting in areas with poor air movement or high humidity.
Fertilizing
Minimal fertilizer needed. Apply a light application of balanced, slow-release fertilizer in early spring. Over-fertilizing reduces fragrance and flavor.
Care Tips
- Plant in well-draining soil, adding coarse sand or gravel to improve drainage if needed.
- Space plants 2-3 feet apart to ensure good air circulation.
- Prune after flowering to maintain shape and prevent woody growth.
- In containers, use terracotta pots which allow soil to dry more quickly.
Common Problems
- Root rot from overwatering or poor drainage is the most common issue.
- Powdery mildew appears as a white coating on leaves in conditions with poor air circulation.
- Spider mites can infest plants during hot, dry periods.
- Woody, sparse growth signals the need for proper pruning.
Seasonal Care
Spring
Apply light fertilizer. Prune to shape after flowering.
Summer
Harvest sprigs as needed for culinary use. Water only when soil is completely dry.
Fall
Reduce watering as temperatures cool. In colder regions, prepare to bring container plants indoors.
Winter
Minimal watering needed. In zones 7 and below, protect with mulch or bring containers indoors to a cool, bright location.