Biofertilizer for Grapes in India (2026): Mycorrhiza Dose per Acre, Cost and the Post-Pruning Schedule

Short answer: for grapes, apply Mycorrhiza (VAM) around the root zone after October pruning, when new feeder roots are being pushed, and repeat once at the active root-growth stage. Orgogrowth Mycorrhiza VAM Powder (6000 IP/gm) costs ₹2,499 per 1 Kg pack and the label dose is 100 g per acre, so one pack covers about 10 acres at roughly ₹250 per acre per round. Vineyards on drip can use the 50 Ltr liquid drum at ₹5,800 including GST (about ₹116 per litre).

"A vine that has just been pruned needs new feeder roots fast. Mycorrhiza helps those roots reach phosphorus and water the plant cannot reach alone." — Orgogrowth India agronomy team

Why timing after pruning matters

In Maharashtra and Karnataka, grape growers prune in the post-monsoon window (commonly October) to set the crop cycle. Pruning shifts the vine from canopy growth to a flush of new roots and shoots. That is the moment mycorrhizal colonisation is most useful: fungal hyphae attach to young roots and extend the zone from which the vine can draw phosphorus, zinc and water. Colonisation is a living process, so it works best when it is established early rather than after the vine is stressed.

Our product specification: Orgogrowth VAM carries 6000 infective propagules (IP) per gram. At the label dose of 100 g per acre, that is about 600 million propagules per acre. In our positioning, VAM can help reduce DAP use by roughly 40-60% where phosphorus is locked up in the soil. Treat that as a target to test on a trial strip, not a guarantee.

A practical post-pruning schedule

• Week 0-2 after pruning: mix 100 g VAM powder per acre with well-decomposed farmyard manure or compost and place it in the root zone, or apply through a drench. Keep the soil moist.
• Gap from fungicide: avoid applying right after copper or systemic fungicide drenches. Leave a few days between them.
• Phosphorus: avoid heavy soluble phosphorus (DAP or SSP) on the same day, since high soluble P suppresses colonisation.
• Second round: repeat at the active root-growth stage, roughly 6-8 weeks later.
• Nitrogen and potash: add an NPK consortia (Azotobacter, PSB, KMB) so the vine gets biological N, P and K support alongside the root benefit.

The trial-strip method (so you do not rely on our word)

Mark two equal rows of the same variety, rootstock and age. Treat one with the VAM schedule above and leave the other on your usual programme. Record cane thickness at the same node, shoot length, leaf colour and bunch count at the same stage. If your treated strip performs equal or better while using less DAP, scale up the next cycle. This is the honest way to judge any biofertilizer, including ours.

Which Orgogrowth product for which vineyard

Small vineyards testing the idea can use Mycorrhiza VAM Powder 1 Kg (₹2,499). Drip-irrigated vineyards that prefer a liquid can use the Mycorrhiza VAM Liquid 50 Ltr drum (₹5,800 incl. GST). For biological nitrogen, phosphorus and potash support in the same season, see the NPK Consortia 50 Ltr drum (₹4,699, about ₹94 per litre).

What it can and cannot do

Biofertilizers reduce, but do not replace, a balanced nutrient programme. Expect the clearest benefit in soils with fixed phosphorus, low organic matter, or after years of heavy chemical fertiliser use. Results depend on soil moisture, pH and fungicide use. Orgogrowth products are FCO 1985 compliant; they are not pesticides and we make no disease-cure claims.

Frequently asked questions

How much Mycorrhiza do I need for one acre of grapes?

The label dose is 100 g of Orgogrowth VAM powder (6000 IP/gm) per acre per round.

What is the price of Mycorrhiza VAM in India?

Orgogrowth VAM Powder 1 Kg is ₹2,499 and VAM Liquid 50 Ltr is ₹5,800 including GST, with free delivery.

When should I apply it on grapes?

Soon after pruning, when new feeder roots are forming, then once more at the active root-growth stage.

Can I use it with fungicides?

Yes, but leave a gap after fungicide drenches and avoid mixing in the same tank.

Is it FCO compliant?

Yes. Orgogrowth biofertilizers are made to FCO 1985 standards and the company is ISO certified.