Collection: Secondary Nutrient Fertilizer
Alongwith the primary nutrients, we also need secondary nutrients for complete growth of plants. Here we have large range of our secondary nutrient fertilizers. Have a look and select your required product.
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Sulphur 90 Powder
Secondary Macronutrient
Regular price ₹ 140Sale price ₹ 140 Regular priceUnit price per₹ 175 -
Basfoliar CaBMag SL
Basfoliar® CaBMag SL is a concentrated liquid foliar fertilizer from Compo Expert that supplies calcium, boron and magnesium for superior fruit quality and plant health. Prevents...
Regular price ₹ 166Sale price ₹ 166 Regular priceUnit price per₹ 175 -
Arjun Sulpha Mag - Epsom Salt
Super fine quality Epsom Salt with sulphur added magnesium for top dressing and foliar spray. Made for fast nutrient uptake with high purity. Partially chelated Epsom...
Regular price ₹ 249Sale price ₹ 249 Regular priceUnit price per₹ 324 -
ChloroCal
Essential Plant Nutrient
Regular price ₹ 230Sale price ₹ 230 Regular priceUnit price per -
Sulphur Bentonite
Sulphur is necessary for the formation of chlorophyll, enzymes and vitamins in plants.
Regular price ₹ 716Sale price ₹ 716 Regular priceUnit price per₹ 895 -
Microwet (Sulphur 90 WG)
Secondary Macronutrient
Regular price ₹ 245Sale price ₹ 245 Regular priceUnit price per -
Sulpha Rich 20F
Arjun Sulpha Rich 20F is a high-performance secondary macronutrient foliar spray that enhances crop yield and quality. With optimized sulphur nutrition for maximum crop performance, it...
Regular price ₹ 277Sale price ₹ 277 Regular priceUnit price per₹ 425 -
Basfoliar Mg Flo
Liquid Formulation Foliar Magnesium (34% MgO) Fertilizer
Regular price ₹ 903Sale price ₹ 903 Regular priceUnit price per₹ 1,062 -
Agricare Kieserite gran.
Natural Magnesium Sulphate Fertilizer
Regular price ₹ 810Sale price ₹ 810 Regular priceUnit price per₹ 900 -
Agricare NitroMag
Magnesium Nitrate Fertilizer
Regular price ₹ 284Sale price ₹ 284 Regular priceUnit price per₹ 472 -
Chelcal
Fully Chelated Micronutrient Fertilizer
Regular price ₹ 135Sale price ₹ 135 Regular priceUnit price per₹ 192 -
Chelmag
Fully Chelated Micronutrient Fertilizer
Regular price ₹ 187Sale price ₹ 187 Regular priceUnit price per₹ 311 -
Sulpha Cal (Powder)
Calcium, Magnesium, Phosphate, and Sulphur Rich Soil Application Manure.Finds use in all types of crops for soil conditioning.
Regular price ₹ 0Sale price ₹ 0 Regular priceUnit price per -
Agricare FlowCal
Foliar Calcium (Ca 12%)
Regular price ₹ 816Sale price ₹ 816 Regular priceUnit price per₹ 1,359 -
Agricare FlowCon
Calcium Suspension (35% CaO)
Regular price ₹ 280Sale price ₹ 280 Regular priceUnit price per₹ 312 -
Sulpha Cal (Granular)
Turf-Grade Calcium and Sulphur Rich Natural Soil Conditioner
Regular price ₹ 1,170Sale price ₹ 1,170 Regular priceUnit price per₹ 1,800
Secondary Nutrient Fertilizers in India | Magnesium, Sulphur and Potassium Fertilizers for Plants
Plants need more than just nitrogen, phosphorus, and potassium to thrive. Secondary nutrients — magnesium, sulphur, and calcium — play a critical role in chlorophyll production, protein synthesis, enzyme activation, and overall plant vigour. Deficiencies in these nutrients are common in Indian soils and often appear as yellowing leaves, poor flowering, or stunted growth. Agricare Corp's secondary nutrient fertilizer range — including magnesium sulphate (epsom salt), potassium magnesium sulphur fertilizers, and specialty liquid formulations — helps you correct deficiencies and maintain healthy, productive plants.
Why Secondary Nutrients Matter
- Magnesium (Mg): Central to chlorophyll structure — a deficiency turns older leaves yellow between the veins while the veins stay green (interveinal chlorosis). Essential for photosynthesis and seed germination.
- Sulphur (S): Necessary for protein and amino acid synthesis. Sulphur-deficient plants show uniform yellowing of young leaves and reduced crop quality and yield.
- Potassium-Magnesium-Sulphur (K-Mg-S) combinations: Correct multiple deficiencies in one application, widely used in commercial horticulture, floriculture, and organic farming.
Epsom Salt (Magnesium Sulphate) for Plants
Epsom salt — chemically magnesium sulphate (MgSO4) — supplies both magnesium and sulphur in a water-soluble form that plants can absorb quickly through both roots and foliage. Common uses include: correcting magnesium deficiency in tomatoes, roses, and peppers; improving fruit set and sweetness; enhancing transplant recovery; and boosting seed germination rates.
How to Apply Secondary Nutrient Fertilizers
- Soil application: Granular K-Mg-S or magnesium sulphate can be broadcast or incorporated into the soil before planting, or top-dressed around established plants.
- Foliar spray: Dissolve magnesium sulphate in water (15 to 20 g per litre) and spray directly on leaves for quick correction of visible deficiency symptoms.
- Drip irrigation: Liquid secondary nutrient formulations are ideal for drip-irrigated crops, nurseries, and container plants.
Safe Handling Checklist
| Step | Details |
|---|---|
| Protective Equipment | Wear gloves when handling granular or liquid fertilizers; wash hands thoroughly after application |
| Mixing Instructions | For foliar spray, dissolve 15 to 20 g per litre of water; do not exceed recommended label dilution rate |
| Avoid Leaf Burn | Apply foliar sprays in early morning or late afternoon only — never in direct midday sun to prevent leaf scorch |
| Pre-Harvest Interval | For edible crops, observe a 7-day pre-harvest interval after the last foliar application |
| Storage | Store in a cool, dry place in original sealed packaging; reseal bags tightly after each use |
| Compatibility | Do not mix magnesium sulphate with calcium nitrate in the same spray solution — precipitation will form |
Application Dosage Guide
| Plant Type | Application Method | Dosage | Frequency |
|---|---|---|---|
| Vegetables (tomatoes, peppers, brinjal) | Foliar spray | 15 to 20 g per litre of water | Every 14 days during fruiting stage |
| Roses and ornamental flowers | Foliar spray | 10 to 15 g per litre of water | Every 21 days |
| Fruit trees (citrus, mango) | Soil drench | 50 to 100 g per tree | Monthly during growing season |
| Lawn and turf grass | Soil broadcast | 25 to 30 g per sq m | Once per season (pre-monsoon) |
| Container and potted plants | Foliar or soil drench | 5 to 10 g per litre of water | Every 14 to 21 days |
Magnesium Sulphate vs K-Mg-S vs Liquid Secondary Nutrient — Comparison
| Feature | Magnesium Sulphate (Epsom Salt) | K-Mg-S Granular | Liquid Secondary Nutrient |
|---|---|---|---|
| Nutrients Supplied | Mg + S | K + Mg + S | Ca + Mg + S (varies by product) |
| Application Method | Soil drench or foliar spray | Soil broadcast or top-dress | Foliar spray or drip irrigation |
| Speed of Action | Fast (foliar: 24 to 48 hours) | Moderate (soil: 1 to 2 weeks) | Fast (foliar application) |
| Best For | Quick Mg deficiency correction in all crops | Multi-deficiency soil correction; commercial horticulture | Precision correction at specific growth stages |
Cross-Sell: Soil Health Correction Kit
Soil Health Correction Bundle — Secondary Nutrient + Bio Stimulant + Soil Conditioner
- Magnesium Sulphate or K-Mg-S Fertilizer — for targeted secondary nutrient correction
- Seaweed Extract Bio Stimulant — for stress recovery, root health, and improved nutrient uptake
- Organic Soil Conditioner — to improve soil structure and long-term nutrient availability
A three-product approach to both correct existing deficiencies and build long-term soil health.
Buying Preference
Frequently Asked Questions
Q: What is epsom salt used for in plants?
A: Epsom salt (magnesium sulphate) supplies magnesium and sulphur — two secondary nutrients that many Indian soils are deficient in. It is commonly used to correct interveinal yellowing, improve photosynthesis, enhance fruit and flower quality, and support healthy root development.
Q: How often should I apply magnesium fertilizer to my plants?
A: For corrective treatment of visible magnesium deficiency, apply once every 2 weeks until symptoms resolve. For regular maintenance, a monthly foliar spray or one granular soil application per growing season is generally adequate.
Q: What is the difference between epsom salt and magnesium sulphate fertilizer?
A: They are essentially the same compound — magnesium sulphate. "Epsom salt" is the common name. Agricultural-grade magnesium sulphate fertilizer is the same chemical in granular or powder form, often at higher purity or in a formulation designed for plant application.
Q: How do I identify a sulphur deficiency in my plants?
A: Sulphur deficiency first appears as a uniform yellowing of young, newly emerging leaves (unlike magnesium deficiency, which starts on older leaves). Affected plants may also show stunted growth and delayed maturity.
Q: Can I use secondary nutrient fertilizers for vegetables and fruits?
A: Yes. Secondary nutrient fertilizers are safe and beneficial for vegetables, fruits, ornamental plants, and turf. Tomatoes, peppers, brinjal, roses, and citrus are particularly responsive to magnesium. Always check the product label for dosage recommendations for edible crops.
