Key Facts: Varieties — Thompson Seedless, Sharad Seedless, Tas-A-Ganesh, Flame Seedless | States — Maharashtra (Nashik, Sangli, Solapur), Karnataka, Andhra Pradesh, Telangana | Crop type — Perennial vine — Kharif pruning (June–July), Rabi fruiting season (Oct–March)
Stage-wise Fertilizer Programme
Pre-Pruning (May–June)
Soil preparation
| Application | Product / Dose / Method |
|---|
| Basal dose | FYM/compost 20–25 MT/ha + Gypsum 500 kg/ha + SSP 300 kg/ha broadcast and incorporated |
| Micronutrient soil application | Zinc sulphate 10 kg/ha + Borax 5 kg/ha + Ferrous sulphate 25 kg/ha through drip or soil application |
| Biostimulant | Seaweed extract 5L/ha soil drench to improve root activity before pruning |
Post-Pruning Stage 1 (Week 1–4)
Bud break and initial shoot growth
| Application | Product / Dose / Method |
|---|
| Nitrogen push | 19:19:19 WSF @ 2 kg/100L through drip × 3 applications, weekly |
| Foliar spray Week 2 | Calcium boron 0.5% foliar spray for cell wall development |
| Soil nutrition | Urea 100 kg/ha split into 2 doses in first 3 weeks |
Active Growth Phase (Week 5–10)
Canopy development, bunch emergence
| Application | Product / Dose / Method |
|---|
| Nitrogen high programme | Urea 150 kg/ha over 6 weeks via fertigation, Ca-N 40 kg/ha |
| WSF fertigation | 13:40:13 @ 3 kg/100L for 3 weeks (balanced growth) |
| Micronutrient spray | Zinc 0.2% + Manganese 0.2% + Boron 0.1% foliar spray × 2 |
| Calcium spray | CaNO3 1% foliar at bunch emergence for berry firmness |
Pre-Berry Set (Week 11–14)
Flowering to fruit set
| Application | Product / Dose / Method |
|---|
| Phosphorus boost | MAP 12:61:0 @ 3 kg/100L × 2 weeks, reduces before flowering |
| Boron critical | Borax 0.2% foliar spray 10 days before and at full bloom — prevents flower drop |
| Reduce nitrogen | Cut nitrogen to 40% of vegetative dose — prevents excessive shoot growth |
Berry Development Phase (Week 15–22)
Berry sizing and sugar accumulation
| Application | Product / Dose / Method |
|---|
| Potassium push | SOP (0:0:50) @ 5 kg/100L fertigation × 6 weeks for colour and sugar |
| WSF MKP | 0:52:34 @ 2 kg/100L × 3 weeks for ripening |
| Stop nitrogen | No nitrogen from veraison onwards — prevents excess vigour and green berries |
| Calcium spray | Calcium chloride 0.5% foliar × 3 times for cracking prevention |
| Gibberellin application | GA3 10–20 ppm at berry set + 10 days later for berry sizing (Thompson Seedless) |
Pre-Harvest (Week 23–26)
Final quality finish
| Application | Product / Dose / Method |
|---|
| Potassium foliar | MKP 0.5% foliar spray × 2 for Brix improvement |
| Stop fertigation | Suspend fertigation 2–3 weeks before harvest for fruit concentration |
| Sulphur dusting | Sulphur 80WP 3 kg/ha for powdery mildew management |
Micronutrient Programme
| Nutrient | Recommended Dose & Method |
|---|
| Zinc (Zn) | 10–15 kg/ha ZnSO4 soil + 0.2% foliar 3× |
| Boron (B) | 5 kg/ha Borax soil + 0.1% Boric acid foliar at flowering |
| Calcium (Ca) | CaNO3 40 kg/ha fertigation + 0.5% CaCl2 foliar |
| Magnesium (Mg) | MgSO4 15 kg/ha soil + 0.5% foliar if deficient |
| Iron (Fe) | FeSO4 25 kg/ha soil + 0.1% chelated Fe foliar |
Deficiency Signs to Watch For
| Deficiency | Symptoms & Identification |
|---|
| Zinc deficiency | Small leaves, interveinal chlorosis, rosette of shoots, poor berry set |
| Boron deficiency | Flower drop, poor fruit set, corky skin, shot berries |
| Calcium deficiency | Berry splitting, soft berries, tip burn on young leaves |
| Magnesium deficiency | Interveinal yellowing starting from leaf margins, older leaves affected first |
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