• peters hydroponic finisher 25 pound bag
  • Peters Professional 0-15-30 Hydroponic Finisher LABEL
  • Peters Professional 0-15-30 Hydroponic Finisher - 25lb
  • A video introducing Peters Professional 0-15-30 Hydroponic Finisher fertilizer.
  • A brief video guide to using Peters Professional 0-15-30 Hydroponic Finisher.
  • Hydroponic Finisher 0-15-30 is a fine powder fertilizer.
  • Description
  • Product Features
  • Specifications
  • Application Rates

Zero-nitrogen finishing formula for specialty crop maturation. Peters Professional 0-15-30 Hydroponic Finisher is a water-soluble fertilizer designed specifically for the final weeks of flowering. This concentrated formulation supports flower density, terpene development, and natural senescence while eliminating nitrogen to enhance color expression and reduce vegetative growth.

Optimized for Late-Stage Flowering

The 0-15-30 NPK ratio with elevated magnesium and sulfur delivers targeted nutrition during flower maturation without nitrogen. This allows growers to reduce total nitrogen by 30% during the finishing period, promoting natural fade and anthocyanin expression while maintaining phosphorus and potassium levels critical for final flower development and resin production.

Key Features

  • NPK formula: 0-15-30 with elevated Mg and S
  • Zero nitrogen for controlled senescence and color development
  • 25% more concentrated in P, K, Mg, and S than standard finishers
  • High-purity anhydrous salts for maximum solubility
  • Reduces fertilizer volume required to hit nutrient targets
  • Compatible with all hydroponic and inert media systems
  • Suitable for concentrated stock solutions and fertigation

Application

Use during the final 2–3 weeks of flowering as a replacement for standard bloom formulas. Pair with calcium nitrate and magnesium sulfate according to your finishing protocol. The concentrated formulation allows precise nutrient delivery with reduced fertilizer volume. Suitable for NFT, DWC, rockwool, coco coir, and other soilless systems.

Specifications

  • Package size: 25 lb bag
  • SKU: Hydro-Finish-25lb
  • Formulated for hydroponic and inert media culture

Technical Documentation

  • Easy to use: Peters Professional Hydroponic Finisher is a great foundation to build a fertilizer program specific to your water and crop.
  • High Analysis: It is 25% more concentrated in P, K, Mg, and S than the competition, allowing plants to hit nutrients targets with less fertilizer.
  • Pure: Anhydrous salts of the highest quality are utilized to minimize caking and ensure delivery of maximum value.
  • Water Soluble: 1.5 lbs/gal maximum solubility
GUARANTEED MINIMUM ANALYSIS 
Available Phosphate (P2O5) . . . . . . . . . . . . . . . . . 15% 
Soluble Potash (K2O) . . . . . . . . . . . . . . . . . . . . . . . 30% 
Magnesium (Mg) . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5% 
5.5% Water Soluble Magnesium (Mg) 
Sulfur (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.1% 
14.1% Combined Sulfur (S) 
Boron (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025% 
Copper (Cu) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01% 
0.01% Chelated Copper (Cu) 
Iron (Fe) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15% 
0.15% Chelated Iron (Fe) 
Manganese (Mn) . . . . . . . . . . . . . . . . . . . . . . . . 0.03% 
0.03% Chelated Manganese (Mn) 
Molybdenum (Mo) . . . . . . . . . . . . . . . . . . . . . . 0.006% 
Zinc (Zn) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.009% 
0.009% Chelated Zinc (Zn) 

Derived from: Potassium Phosphate, Magnesium Sulfate, Sodium Molybdate, Iron EDTA, Zinc EDTA, Copper EDTA, Manganese EDTA, Boric Acid, Potassium Sulfate

Peters Professional Hydroponic Finisher is a great foundation to build a fertilizer program specific to your water and crop.

 

Instructions to make up a tank of fertilizer at full strength for crops (no injector):

STEP 1: Dissolve 130 ounces (or 8 pounds 2 ounces) of this material in 1000 gallons to obtain the following concentrations: 

  
  Total ppm
 Nitrogen N 0
 Phosphorus P 64
 Potassium K 243
 Magnesium Mg 54
 Sulfur S 138
 Iron Fe 1.5
 Manganese Mn 0.29
 Zinc Zn 0.09
 Copper Cu 0.09
 Boron B 0.25
 Molybdenum Mo 0.06
                      
STEP 2: Test your water to determine if additional magnesium is required. An average of 50 to 75 ppm magnesium in the final solution is desirable for most crops. If additional magnesium is required, dissolve epsom salts into tank (1 oz of epsom salts dissolved in 100 gal supplies 7.5 ppm Mg). 

STEP 3: After the Peters Professional 0-15-30 Hydroponic Finisher and any epsom salts are fully dissolved, proceed to supplement your crop with required concentrations of N and Ca. (Example: In 1000 gal, dissolve 80 oz of Peters 14-0-8 Hydroponic Boost to add 189 ppm N, 183 ppm Ca, and 12 ppm Mg.) 

Peters Professional 0-15-30 Hydroponic Finisher - 25 lb

Peters Professional 0-15-30 Hydroponic Finisher - 25 lb

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At the leading edge of the market, Custom Hydro stands out by providing the growing industry with fertilizers that are not only of premium quality but also feature innovative
solutions tailored for the unique needs of hydroponic and organic farming practices.

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