Physiological hormonal action and cellular elongation
Gibberellins stimulate hydrolytic enzymes and accelerate cell division and cell elongation along plant axes.
- Cell elongation: Promotes longitudinal expansion of plant cells, increasing stem internode length and fruit pedicel stretch.
- Enzyme mobilization: Activates alpha-amylase in germinating seeds, converting stored starches into sugars to break seed and tuber dormancy.
- Cluster elongation in grapes: Sprayed during pre-bloom to stretch flower clusters (rachis), preventing tight, rot-prone berry clusters.
- Overcoming dwarfism: Enhances vegetative vigor and stem girth in physiologically stunted crops.
Commercial applications across fruit and vegetable horticulture
GA3 is an essential input across high-value commercial horticultural crops in India.
- Table Grapes: Multiple spray and bunch dipping treatments (elongation, thinning, and berry sizing) in Thompson Seedless grapes.
- Citrus (Sweet orange, Lime): Delays rind senescence, reduces peel creasing, and extends post-harvest shelf life.
- Sugarcane: Stimulates rapid internode elongation, increasing millable cane length and total cane tonnage.
- Paddy (Rice seed production): Applied to cytoplasmic male sterile (CMS) lines to enhance panicle exertion for hybrid seed production.
Dilution technique, precise ppm measurement, and overdose care
Because Gibberellic Acid powder does not dissolve directly in water, dissolve the measured powder in a few millilitres of surgical alcohol or mild ethanol before mixing into the spray water. Measure dosages strictly at recommended parts-per-million (ppm) concentrations. Overdosing with GA3 causes excessive spindly growth, pale foliage, and reduced flower bud differentiation.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
National Horticulture Board (Govt of India) ↗Related on KisanPe
Common questions
What is Gibberellic Acid (GA3) used for in Indian agriculture?
GA3 is a plant growth regulator used to increase berry size in grapes, elongate sugarcane internodes, and break seed dormancy.
Why is GA3 essential for commercial seedless grape farming?
GA3 stretches flower clusters to prevent bunch rot, induces natural flower thinning, and dramatically enlarges individual grape berries.
How should pure Gibberellic Acid powder be dissolved?
Dissolve the powder in a small amount of pure alcohol (ethanol) first to form a clear solution before diluting into the final spray water.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
More General Agriculture guides
Ask Sakhi AI in your language, check live mandi prices or plan a loan with KisanPe tools.