Boron Deficiency in Marigold India — Symptoms, Causes & Correction

Poor fruit set, flower drop, hollow stem, thick curled leaves, tip dieback.

Sandy soils, acidic soils, high calcium, dry weather. Boron has narrowest sufficiency range.

Karnataka, Tamil Nadu, AP
Loamy, pH 6–7

Correction Products & Doses

Product	Method	Rate	Best For
Boron 20% WSP	Foliar + Drip	1–1.5g/L foliar / 200g/acre drip	At flowering — critical timing
Calcium Boron Liquid	Foliar	2.5 mL/L at flowering	Grapes, tomato, capsicum
Borax 11%	Soil	1–2 kg/acre	Pre-planting

Confirm deficiency — Soil test + leaf analysis. Check soil pH (most deficiencies are pH-related).
Immediate foliar spray — Apply Boron 20% WSP at 1–1.5g for fast correction. Repeat after 7–10 days.
Drip correction — Apply via fertigation for lasting effect.
Prevent recurrence — Include in regular nutrition program. Test soil pH and adjust if needed.

Direct from CIB-registered manufacturer. Share your soil test and we recommend exact dose for your farm.