Peters Professional Fertilizers

Peters Fertilizers offers a comprehensive, professional-grade line of water-soluble and liquid fertilizers designed to meet the precise nutritional needs of diverse crops, from home gardens to commercial hydroponic operations. The range is built around specialized formulations that target specific growth stages, crop types, and growing media, ensuring growers can fine-tune their feeding programs for maximum health and yield.

Core General Purpose & Acid-Specific Formulations
For versatile, all-around plant nutrition, the line includes several general-purpose options. Peters General Purpose 20-20-20 provides a perfectly balanced ratio of nitrogen, phosphorus, and potassium, making it an excellent staple for supporting vigorous growth, flowering, and fruiting across a wide variety of plants. Where media pH management is a concern, Peters General Purpose 20-10-20 offers a modified ratio with acidifying action to help suppress pH rise in peat-based mixes, making it ideal for potted plants, bedding plants, and container nursery stock. For acid-loving species like azaleas, rhododendrons, and blueberries, Peters 21-7-7 Acid Special Fertilizer delivers a balanced nutrient profile while helping to enhance soil acidity for improved nutrient uptake. The Peters Excel Multi-Purpose 21-5-20 serves as a moderately acidic, flexible base that can be mixed with other Excel line products to create custom formulations tailored to specific crop demands.

Specialized Hydroponic & Crop-Specific Nutrients
The Peters line is particularly robust for soilless culture. A foundational two-part system is evident for hydroponic growers. Peters Hydroponic Special 5-11-26 is a complete base nutrient formulated to support the entire growth cycle, with its high potassium and phosphorus levels promoting strong root development, flowering, and fruiting. It is designed to be used in conjunction with a supplemental calcium nitrate source, such as the Peters CalMag Special Grower 15-5-15 + 7CaO + 3MgO + TE , which provides essential calcium, magnesium, and trace elements to ensure robust cell structure and complete nutrition. For targeted growth phases, Peters Professional 14-0-8 Hydroponic Boost delivers elevated nitrogen and potassium to fuel rapid vegetative surges, while its Base Formulation provides supplemental nitrogen, potash, calcium, and magnesium for vigorous crops. As plants mature, Peters Professional Hydroponic Finisher 0-15-30 is a zero-nitrogen, high-phosphorus and potassium formula designed to be used in the final weeks before harvest to maximize flower and fruit development.

Foliar Feeding & Micronutrient Supplements
To address immediate nutritional needs or correct deficiencies, the line includes targeted products for foliar application. Peters Professional 30-10-10 High Nitro Foliar Feed provides a quick-acting nitrogen source for lush foliage and rapid recovery during periods of stress or fast growth. For comprehensive micronutrient supplementation, Peters Professional S.T.E.M. Liquid Fertilizer is an industry-standard, easy-to-apply liquid formula suitable for both foliar feeding and soil drenching. The same essential trace element package is available in a dry, dye-free format as Peters STEM Water Soluble Micronutrients Trace Element Mix No Dye . Featuring an exclusive M-77 chelating formula, this mix ensures fast and efficient absorption of iron, manganese, zinc, and other vital micronutrients across all water types, making it an ideal complement to any primary fertilization program. This complete system of base nutrients, crop-specific boosters, and targeted supplements makes Peters Fertilizers a versatile and trusted choice for achieving predictable, high-quality results.

Peters Professional Hydroponic Special 5-11-26

• Guaranteed Analysis:

• Usage: A complete base nutrient for hydroponic production of vegetables, herbs, and fruiting crops. Formulated for use with supplemental calcium nitrate. Suitable for recirculating and drain-to-waste systems.
• Application Rate: 100-250 ppm nitrogen (2-4 lbs per 100 gallons) depending on crop stage.

Peters Professional CalMag Special 15-5-15 + 7CaO + 3MgO + TE

• Guaranteed Analysis:

• Usage: Provides calcium and magnesium supplementation for hydroponic and soilless crops. Commonly used in conjunction with Hydroponic Special 5-11-26 to create a complete nutrient program. Supports cell wall strength and prevents blossom end rot in fruiting crops.
• Application Rate: 100-200 ppm nitrogen (2-3 lbs per 100 gallons).

Peters Professional 21-7-7 Acid Special

• Guaranteed Analysis:

• Usage: Formulated for acid-loving crops including azaleas, rhododendrons, blueberries, and conifers. High ammoniacal nitrogen content lowers substrate pH to improve nutrient availability in alkaline conditions.
• Application Rate: 200-300 ppm nitrogen (3-5 lbs per 100 gallons) as needed during active growth.

Peters Professional Excel Multi-Purpose 21-5-20

• Guaranteed Analysis:

• Usage: A moderately acidic general-purpose formulation suitable for a wide range of container crops, bedding plants, and perennials. Can be blended with other Excel formulations for custom nutrient ratios.
• Application Rate: 200-300 ppm nitrogen (3-5 lbs per 100 gallons) for constant liquid feed programs.

Peters Professional General Purpose 20-20-20

• Guaranteed Analysis:

• Usage: An all-purpose formulation for maintenance feeding of established plants, greenhouse crops, and outdoor containers. Balanced NPK ratio supports both vegetative growth and flowering.
• Application Rate: 200-300 ppm nitrogen (3-5 lbs per 100 gallons) every 1-2 weeks depending on crop needs.

Peters Professional General Purpose 20-10-20

• Guaranteed Analysis:

• Usage: Specifically formulated for peat-based and bark-based growing media. The acidifying action helps suppress pH elevation over time. Suitable for potted plants, bedding plants, and container nursery stock.
• Application Rate: 200-300 ppm nitrogen (3-5 lbs per 100 gallons) with every irrigation.

Peters Professional 14-0-8 Hydroponic Boost

• Guaranteed Analysis:

• Usage: A nitrate-based supplement for hydroponic systems during periods of rapid vegetative growth. Provides nitrogen, calcium, and potassium without phosphorus. Compatible with recirculating systems.
• Application Rate: 100-150 ppm nitrogen (1.5-2.5 lbs per 100 gallons) as a boost during active growth phases.

Peters Professional 14-0-8 Hydroponic Boost (Base Formulation)

• Guaranteed Analysis:

• Usage: Base formulation of the Hydroponic Boost line. Provides supplemental nitrogen, potash, calcium, and magnesium for hydroponic crops. Designed to be used as part of a complete nutrient program.
• Application Rate: 100-150 ppm nitrogen (1.5-2.5 lbs per 100 gallons).

Peters Professional 30-10-10 High Nitro Foliar Feed

• Guaranteed Analysis:

• Usage: High-nitrogen formulation for foliar application on ornamentals, turf, and nursery crops. Provides rapid green-up and vegetative response. Can also be applied as a soil drench.
• Application Rate (Foliar): 2-4 lbs per 100 gallons water. Apply to point of runoff, preferably during early morning or late evening.

Peters Professional Hydroponic Finisher 0-15-30

• Guaranteed Analysis:

• Usage: Zero-nitrogen finisher formulation for the final 1-2 weeks of flowering and fruiting cycles in hydroponic systems. High phosphorus and potassium support fruit set, development, and ripening.
• Application Rate: 100-150 ppm potassium (1-1.5 lbs per 100 gallons) during final growth phase.

Peters Professional S.T.E.M. Liquid Fertilizer

• Product Type: Ready-to-use liquid concentrate.
• Guaranteed Analysis:

• Usage: A complete micronutrient supplement for rapid correction of trace element deficiencies. Suitable for foliar application or soil drenching. Compatible with most fertilizer programs.
• Application Rate (Foliar): 1-2 fl oz per gallon water. (Soil drench): 2-4 fl oz per gallon water.

Peters Professional STEM Water Soluble Micronutrients (No Dye)

• Guaranteed Analysis:

• Chelating Agent: Exclusive M-77 chelating formula for fast and efficient nutrient absorption across all water types.
• Usage: A dry, dye-free micronutrient mix designed to complement primary fertilizer programs. Provides essential trace elements for crops showing deficiency symptoms or for preventative maintenance. Effective in both soil and soilless systems.
• Application Rate: 0.5-1 lb per 100 gallons water, depending on crop requirements and water quality.

This complete product line provides professional growers with precise nutritional tools for every crop type, growth stage, and production system. Each formulation is manufactured to ICL's quality standards for consistency and solubility.