Major cultivated types and varieties
Commercial growers choose marigold varieties based on flower size, bloom duration, and market demand.
- African Marigold: Tall plants (60 to 90 cm) producing large globular flowers in bright yellow, orange, and golden hues; primary commercial choice for loose flowers.
- French Marigold: Dwarf bushy plants (20 to 35 cm) with smaller, abundant blooms in reddish-brown, yellow, and bicolor; suited for borders, pots, and intercropping.
- Commercial Hybrids: F1 hybrids selected for prolific yield and uniform flower shape.
- High lutein varieties preferred for industrial natural dye and poultry feed pigment extraction.
Agronomic practices: Nursery, transplanting, and irrigation
Successful cultivation requires proper nursery raising and timely cultural operations.
- Sowing Seasons: Can be grown across three seasons—Rainy season (sown May-June), Winter season (sown September-October), and Summer season (sown January-February).
- Seed Rate and Nursery: 1 to 1.5 kg per hectare for open-pollinated varieties, or 250 to 300 grams for hybrid seeds raised in pro-trays.
- Transplanting: Transplant 25 to 30 day old healthy seedlings at a spacing of 45 by 45 cm or 60 by 45 cm.
- Pinching: Pinch off the apical terminal shoot 35 to 40 days after transplanting to encourage lateral branching and increase flower count per plant.
- Irrigation: Irrigate regularly at 7 to 10 day intervals; avoid water stagnation which induces collar rot and damping-off.
Nematode suppression and trap cropping benefits
Marigold plays an important ecological role in integrated pest and nematode management.
- Root Exudates: Roots secrete alpha-terthienyl, a natural allelopathic compound that suppresses root-knot nematodes.
- Trap Crop: Intercropped with tomato, brinjal, chilli, and cotton to trap fruit borers and divert them from cash crops.
- Harvest flowers early in the morning when fully open and pack in ventilated crates or gunny bags for transport to flower mandis.
Official source
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ICAR - Directorate of Floricultural Research (DFR) ↗Related on KisanPe
Common questions
Why is pinching important in commercial marigold farming?
Pinching removes the main terminal shoot, breaking apical dominance and stimulating multiple lateral branches that produce more flowers.
How does marigold help control root-knot nematodes?
Marigold roots secrete alpha-terthienyl, an organic compound toxic to root-knot nematodes, effectively reducing nematode populations in the soil.
What are the best months to plant winter marigold in North India?
Sow nursery seeds in September to October and transplant seedlings in October to November to harvest blooms from December to February.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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