Marigold Growing Guide
Annual flower grown for bedding plants, cut flowers, and as an industrial source of lutein for poultry feed and dietary supplements. Also used as a companion plant for pest management.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: loam, sandy loam, well-drained
pH range: 6 - 7.5 (optimal: 6.5)
Drainage: good
Nutrient Needs (N-P-K)
Planting Guide
Yield & Economics
Common Pests & Diseases
Common Pests
- spider mites
- whiteflies
- slugs
- earwigs
Common Diseases
- botrytis
- powdery mildew
- alternaria leaf spot
Use to identify issues early and prevent crop losses.
Growing Tips
Marigold root exudates suppress nematodes — rotate or interplant with nematode-susceptible crops like tomatoes for biological pest management.
Deadhead spent flowers regularly to extend blooming; marigolds flower continuously from early summer until frost if properly maintained.
For lutein extraction (industrial use), harvest at full bloom and dry flowers rapidly; lutein content can reach 8-12 g/kg dry weight in African marigold.
Frequently Asked Questions
How long does Marigold take to grow?
Marigold typically takes 50 days from planting to harvest. Seeds germinate in about 5 days. The best planting season is spring.
What soil does Marigold need?
Marigold grows best in loam, sandy loam, well-drained soil with a pH of 6-7.5. Good drainage is required.
What temperature does Marigold need?
Marigold grows best at 18-30°C. Frost tolerance: none. Heat tolerance: high.
What is the expected yield for Marigold?
Marigold yields approximately 15,000 kg fresh flowers/hectare under good conditions. Multiple harvests per year are possible (2).
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