Planofix Plant Growth Regulator: Uses, Dose & Timing

Mode of action and biological role of NAA

Alpha Naphthyl Acetic Acid acts as a synthetic auxin that regulates cell elongation and abscission layer formation.

• Prevents the premature formation of the abscission zone at the pedicel base, arresting flower and fruit drop.
• Stimulates uniform flowering and improves fruit setting during adverse weather conditions.
• Induces flowering in pineapples and improves berry size and bunch uniformity in table grapes.
• Enhances cell enlargement during the initial stages of fruit growth.

Recommended crop stages and application timing

Timing and precise dilution are critical because excessive concentrations can cause adverse physiological effects.

• Chilli and Bell Pepper: First spray at flowering initiation; second spray 20 to 25 days later to maintain fruit retention.
• Cotton: Spray at square formation and flowering to suppress square and boll shedding.
• Tomato: Spray at blossom initiation to maximize fruit set and reduce blossom-end drop.
• Mango and Citrus: Spray during marble-stage fruit set to prevent premature fruitlet drop.

Safe dilution and handling guidelines

Farmers must measure Planofix precisely using calibrated dispensers rather than approximate field estimates.

• Strictly adhere to CIBRC-approved label dilution rates, usually measured in parts per million (ppm).
• Never exceed recommended concentration, as excessive auxin rates can induce defoliation or stunted growth.
• Spray during early morning or late evening hours to avoid rapid foliar drying under direct midday sun.
• Ensure uniform coverage of flower clusters using clean, neutral spray water.

Related on KisanPe

• Crop Nutrition Hub →
• Cotton Farmers →
• Horticulture Guide →
• Fertilizer calculator →
• Soil Health Card →

Common questions

General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.