Gibberellic Acid 0.001% L Plant Growth Regulator Uses

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Gibberellic Acid 0.001% L is a CIB-registered plant growth regulator (PGR) based on GA3, a natural plant hormone used at an ultra-low field concentration to boost vegetative growth, flowering, fruit-set and yield across cereals, cash crops, pulses, fruits and vegetables. This page lists its mode of action, key benefits and the complete crop-wise recommended dosage as per the approved label.

Which Growth Problem Is This For?

GA3 (gibberellic acid) foliar sprays are usually reached for at specific growth-stage bottlenecks rather than sprayed as a routine input. No major/MNC brand could be confirmed for this exact 0.001% L formulation, so the table below stays brand-neutral and simply maps common growth problems in the crops covered on this page to when a GA3 0.001% L spray is generally used to address them.

Crop Growth Problem What You'll See / When to Use
Paddy (Rice) Weak tillering, uneven grain fill Fewer productive tillers and patchy grain development; sprayed at the tillering stage suited to the variety's duration
Sugarcane Short internodes, poor cane length/girth Stunted-looking cane with thin girth and lower juice-yield potential; sprayed at the early and mid growth stages
Cotton Poor boll development Fewer or smaller bolls forming, affecting fibre yield; sprayed at early growth and at boll formation
Groundnut Sparse flowering, low pod set Fewer flowers/pegs translating to fewer pods at harvest; sprayed at flowering
Tomato Poor fruit set Flowers dropping without setting fruit, or low fruit numbers per plant; sprayed at early and mid growth stage
Potato Weak haulm growth Thin, sparse canopy limiting photosynthesis and tuber bulking; sprayed at early and mid growth stage
Cabbage Small head size Heads forming smaller or looser than expected; sprayed at early and mid growth stage
Cauliflower Small curd size Curds staying small or loose instead of firm and full; sprayed at early and mid growth stage
Grapes Small berry size, uneven bunches Berries not sizing up well and clusters looking uneven; sprayed post-pruning and at match-head stage
Banana Poor bunch development Bunches forming with fewer or smaller fingers; sprayed across the vegetative-to-fruiting window
Brinjal / Bhindi (Okra) Fruit drop, irregular fruiting Flowers or young fruit dropping, or picking rounds becoming inconsistent; sprayed across the extended fruiting period
Tea Slow flush growth New leaf flush coming slowly, limiting pluckable shoot yield; sprayed at monthly intervals
Onion Slow bulb development Bulbs sizing up slowly or unevenly; sprayed once during bulb initiation
Mulberry Low leaf yield after pruning Regrowth after harvest/pruning is slow or sparse, limiting leaf availability for silkworms; sprayed after harvest/pruning

Mode of Action

Gibberellic Acid (GA3) is a naturally occurring plant growth hormone that regulates cell elongation and cell division, mainly in stems and internodes. On foliar application it is absorbed by leaves and translocated within the plant, where it shifts the internal balance of growth-promoting and growth-inhibiting hormones. This triggers longer internodes, more vigorous vegetative growth, better flower induction and improved fruit/pod/bunch set. At the 0.001% concentration used in field sprays, the effect is a controlled growth boost rather than the excessive elongation seen at higher lab-grade concentrations, making it suitable for repeated crop-stage sprays.

Features & Benefits

  • Promotes cell elongation and vigorous vegetative growth, giving a visibly taller and more uniform crop stand
  • Improves flowering, fruit-set and bunch/pod/berry development, translating into higher marketable yield
  • Enhances quality parameters such as grain filling in paddy, berry size in grapes and bunch weight in banana
  • Very low use rate per acre makes it an economical addition to routine foliar nutrition and spray schedules

Recommended Usage of Gibberellic Acid 0.001% L Plant Growth Regulator

The table below gives the recommended dose, water volume and application stage per acre for each crop.

Crop Purpose/Effect Dose per Acre Water Volume per Acre Application Stage
Paddy (Rice) Boosts tillering and grain yield/quality 72 ml 180–200 litres Short duration varieties: 20–25 DAT; Medium duration: 30–35 DAT; Long duration: 40–45 DAT
Sugarcane (planted crop) Improves cane length, girth and juice yield 72 ml 180–200 litres 1st spray at 40–45 DAP; 2nd spray at 70–80 DAS
Cotton Aids boll development and fibre yield 72 ml 180–200 litres 1st spray at 40–45 DAP; 2nd spray at boll formation
Groundnut Enhances flowering and pod yield 72 ml 180–200 litres 1st spray at flowering (30–35 DAS); 2nd spray at flowering
Tomato Improves fruit set and yield 72 ml 180–200 litres 1st spray at 45 DAS; 2nd spray at 65 DAS
Potato Supports haulm growth and tuber yield 72 ml 180–200 litres 1st spray at 45 DAS; 2nd spray at 65 DAS
Cabbage Improves head size and quality 72 ml 180–200 litres 1st spray at 45 DAS; 2nd spray at 65 DAS
Cauliflower Improves curd size and quality 72 ml 180–200 litres 1st spray at 45 DAS; 2nd spray at 65 DAS
Grapes Increases berry size and bunch/cluster quality 72 ml 180–200 litres 1st spray 30–35 days after pruning; 2nd spray at match-head stage
Banana Improves bunch development and fruit yield 108 ml 180–200 litres 1st spray in 3rd month; 2nd spray in 5th month; 3rd spray at fruit formation
Brinjal / Bhindi (Okra) Boosts fruit set and continuous fruiting 180 ml 180–200 litres 1st spray at 34 DAP; 2nd spray at 70 DAP; 3rd spray at 105 DAP
Tea* Stimulates flush growth and leaf yield 108 ml 180–200 litres 5 sprays at monthly interval
Onion† Supports bulb development 72 ml 180–200 litres Single spray at 25–30 days after planting
Mulberry† Improves leaf yield/quality for sericulture 180 ml 180–200 litres 1st spray 15–20 days after harvest/pruning; 2nd spray 25–30 days after the first (unverified - single source for the two-spray schedule)

Doses above are converted from the official label rate, expressed per hectare where applicable (1 ha ≈ 2.47 acres). *Tea dose is drawn from a single verified extension source (TNAU) and could not be cross-checked against a second independent source (unverified - single source). †Onion and Mulberry are commonly recommended by GA3 0.001% L manufacturers but do not appear on the TNAU-published CIB-approved crop list for this formulation — treat as generally accepted trade/extension practice rather than a confirmed CIB label use. Always confirm against the product label before spraying, and follow your local agricultural extension advice.

How to Use

  1. Identify your crop, its growth stage and the corresponding dose from the table above.
  2. Measure the required quantity of Gibberellic Acid 0.001% L and pre-mix it in a small quantity of water, then add it to the spray tank filled with the full recommended water volume for your acreage, stirring well.
  3. Spray as a fine, uniform mist over the foliage using a knapsack, power or boom sprayer, ensuring full leaf coverage on both upper and lower surfaces.
  4. Apply during the cooler hours of early morning or late evening, and avoid spraying in strong wind or if rain is expected within a few hours, as this can wash off the spray and reduce effectiveness.
  5. Where the crop calls for more than one spray, repeat at the growth stage/interval given in the table — do not bunch sprays closer together than recommended, as this does not improve results and only increases input cost.

Precautions & Safety

  • Wear appropriate personal protective equipment (gloves, mask, full-sleeve clothing) while mixing and spraying.
  • Check compatibility before tank-mixing with other pesticides, fertilisers or micronutrients; do a small jar test first if unsure.
  • Store in a cool, dry place away from direct sunlight, heat and out of reach of children and animals; keep the container tightly closed.
  • Do not exceed the recommended dose or spray frequency — over-application can cause abnormal stem elongation, weak/lodging-prone growth, delayed maturity or reduced yield rather than an improvement.
  • Wash hands, face and exposed skin thoroughly with soap after handling, and avoid contaminating ponds, wells or other water sources with spray residue or rinse water.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.

Disclaimer

The dosage and usage information on this page is based on the Central Insecticides Board & Registration Committee (CIB&RC), Government of India, document "Major Uses of Pesticides" (registered under the Insecticides Act, 1968; updated up to 31.03.2026). As stated in that document, it has been compiled on the basis of available information for guidance and not for legal purposes. Likewise, this page is for general information and guidance only; it is not intended for any legal purpose and has no legal validity.

Before using any product, always read and follow the instructions on its label and leaflet. If in doubt, consult your local agricultural extension officer.

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