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Nutrients & Additives

Give your crops the high-quality plant nutrients they need for robust development and greater yields. Hydrofarm offers a comprehensive selection of premium fertilizers and additives for hydroponic, greenhouse, and indoor commercial operations.



Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 1 lb
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 1 lb
SKU:
RT4401
SRP: $25.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 2.2 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 2.2 lbs
SKU:
RT4402
SRP: $39.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 20 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 20 lbs
SKU:
RT4403
SRP: $255.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 50 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 50 lbs
SKU:
RT4404
SRP: $644.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 100 g Singles (60 per case)
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 100 g Singles (60 per case)
SKU:
RT6502
SRP: $278.99
Mykos Granular
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 1 lb
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 1 lb
SKU:
RT4401
SRP: $25.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 2.2 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 2.2 lbs
SKU:
RT4402
SRP: $39.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 20 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 20 lbs
SKU:
RT4403
SRP: $255.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 50 lbs
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 50 lbs
SKU:
RT4404
SRP: $644.99
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 100 g Singles (60 per case)
Xtreme Gardening / RTI
Xtreme Mykos Pure Mycorrhizal Inoculum, Granular, 100 g Singles (60 per case)
SKU:
RT6502
SRP: $278.99
Xtreme Azos Beneficial Bacteria, 12 oz (340 g)
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 12 oz (340 g)
SKU:
RT1351
SRP: $65.98
Xtreme Azos Beneficial Bacteria, 2 oz
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 2 oz
SKU:
RT1349
SRP: $25.99
Xtreme Azos Beneficial Bacteria, 6 oz (170 g)
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 6 oz (170 g)
SKU:
RT1350
SRP: $40.99
Xtreme Azos Beneficial Bacteria, 8 lbs
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 8 lbs
SKU:
RT1352
SRP: $454.99
Xtreme Azos Beneficial Bacteria, 20 lbs
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 20 lbs
SKU:
RT1353
SRP: $1,049.99
Xtreme Azos Nitrogen Fixing Microbes
Xtreme Azos Beneficial Bacteria, 12 oz (340 g)
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 12 oz (340 g)
SKU:
RT1351
SRP: $65.98
Xtreme Azos Beneficial Bacteria, 2 oz
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 2 oz
SKU:
RT1349
SRP: $25.99
Xtreme Azos Beneficial Bacteria, 6 oz (170 g)
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 6 oz (170 g)
SKU:
RT1350
SRP: $40.99
Xtreme Azos Beneficial Bacteria, 8 lbs
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 8 lbs
SKU:
RT1352
SRP: $454.99
Xtreme Azos Beneficial Bacteria, 20 lbs
Xtreme Gardening / RTI
Xtreme Azos Beneficial Bacteria, 20 lbs
SKU:
RT1353
SRP: $1,049.99

Nutrients & Additives Resources

The Trusted Partner for Your Grow Operation

With over 40 years of expertise, Hydrofarm is the leading manufacturer and distributor for commercial growers and retailers. We provide cost-effective, premium-grade plant nutrients and additives to ensure your operation achieves consistent, high-quality results. Our concentrated formulas are designed for maximum nutrient uptake, helping you reduce costs while increasing yields.

Why Choose Nutrients & Additives for Your Operation?

Selecting the right nutrients and additives for your operation is essential for achieving robust plant growth, higher yields, and overall superior crop vigor. Nutrients provide the foundational elements plants need to flourish, from core macronutrients like nitrogen, phosphorus, and potassium to essential secondary macronutrients such as calcium, magnesium, and sulfur, which drive critical processes like enzyme production and photosynthesis. By incorporating high-quality additives, you can further enhance nutrient uptake, improve soil structure (or ‘fertility’, or ‘tilth’), and optimize conditions for plant growth. 

Hydrofarm’s wide selection of premium products enables growers to create customized feeding programs tailored to the specific demands of their crops and growing environments. Rely on Hydrofarm to support every stage of growth, from germination to harvest, empowering your operation with trusted, industry-leading solutions.

What Are Essential Plant Nutrients?

Essential plant nutrients are the essential elements required for vigorous plant growth. They are divided into two categories: macronutrients and micronutrients. Macronutrients, like nitrogen, phosphorus, and potassium, are needed in larger quantities. Micronutrients, or trace elements like iron, manganese, and boron, are required in smaller amounts but are just as crucial for processes like photosynthesis and chlorophyll formation.

How Can I Determine If My Plants Have Nutrient Deficiencies?

Nutrient deficiencies often present visible deficiency symptoms. Common signs include yellowing of older leaves (potassium deficiency or iron deficiency), stunted growth of leaves (zinc deficiency), weak plant structure, poor root growth, or a purplish discoloration (phosphate deficiency). For example, a calcium deficiency can lead to weakened cell walls. Regular observation and soil testing can help identify specific issues early.

How Do I Balance Nutrients in My Garden Soil for Optimal Plant Growth?

Balancing plant nutrients requires a strategic approach to nutrient management. Start by conducting a soil testing analysis to understand your current soil pH and nutrient levels. Based on the results, you can select fertilizers with the appropriate NPK ratio and supplement with specific macronutrients or micronutrients as needed to prevent acidic soils, toxicity, or deficiency. Consider factors like your soil type, as sandy soils are more prone to nutrient leaching.

How Do I Choose the Right Fertilizer for My Plants' Nutrient Needs?

Choosing the right fertilizer depends on your crop type, growth stage, and growing medium. For the flowering or fruiting stage, a fertilizer high in phosphorus and potassium is ideal. For vegetative growth, a nitrogen-rich formula supports foliage development. Always consider the guaranteed analysis (NPK) and the nutrient source. For tailored recommendations, our grow consultants can help you create a custom feeding program.

Choose from over 130 trusted brands, many exclusive to Hydrofarm, to support every stage of plant growth. Our products are formulated with the finest macronutrients and chelated micronutrients to promote vigorous development, from strong root growth to impressive fruiting.