Indigo Growing Guide
Tropical leguminous shrub historically the primary source of blue dye. Experiencing a revival as demand for natural dyes grows in sustainable fashion and artisan textile markets.
Growing Conditions
Soil Requirements
Soil Type & pH
Best soil types: sandy loam, loam, laterite
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
- pod borers
- leaf caterpillars
- aphids
Common Diseases
- leaf spot
- wilt
- root rot
Use to identify issues early and prevent crop losses.
Growing Tips
Harvest leaves just before flowering when indican content is highest; cut plants 15-20 cm above ground for regrowth.
As a legume, indigo fixes nitrogen and improves soil fertility — excellent in crop rotation with nitrogen-demanding crops.
Dye extraction requires fermentation: soak fresh leaves in water for 12-24 hours, then aerate the liquid to oxidize and precipitate the indigotin pigment.
Frequently Asked Questions
How long does Indigo take to grow?
Indigo typically takes 120 days from planting to harvest. Seeds germinate in about 7 days. The best planting season is spring, monsoon.
What soil does Indigo need?
Indigo grows best in sandy loam, loam, laterite soil with a pH of 5.5-7.5. Good drainage is required.
What temperature does Indigo need?
Indigo grows best at 22-35°C. Frost tolerance: none. Heat tolerance: high.
What is the expected yield for Indigo?
Indigo yields approximately 1,500 kg dried leaf/hectare under good conditions. Multiple harvests per year are possible (3).
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