Calendula Growing Guide
Annual herb with bright orange-yellow flowers cultivated for medicinal use in skin preparations, wound healing, and anti-inflammatory products. Also used as a natural food colorant.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: loam, sandy loam, clay loam
pH range: 5.5 - 7.5 (optimal: 6.5)
Drainage: good
Nutrient Needs (N-P-K)
Planting Guide
Yield & Economics
Common Pests & Diseases
Common Pests
- aphids
- whiteflies
- slugs
Common Diseases
- powdery mildew
- downy mildew
- leaf spot
Use to identify issues early and prevent crop losses.
Growing Tips
Deadhead regularly or harvest flowers frequently to encourage continuous blooming throughout the season.
Harvest fully open flowers on dry mornings after dew has evaporated; dry at temperatures below 40C to preserve active compounds.
Calendula tolerates light frost and can be succession-sown every 2-3 weeks for extended harvest periods.
Frequently Asked Questions
How long does Calendula take to grow?
Calendula typically takes 50 days from planting to harvest. Seeds germinate in about 7 days. The best planting season is spring, fall.
What soil does Calendula need?
Calendula grows best in loam, sandy loam, clay loam soil with a pH of 5.5-7.5. Good drainage is required.
What temperature does Calendula need?
Calendula grows best at 10-25°C. Frost tolerance: light. Heat tolerance: low.
What is the expected yield for Calendula?
Calendula yields approximately 2,000 kg dried flowers/hectare under good conditions. Multiple harvests per year are possible (4).
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