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Peters Professional21-7-7 Acid Special

Designed exclusively for high-acid crops. Offsets high alkalinity water while effectively lowering pH levels in growing media.

  • customizing component can be used with a variety of base formulations
  • effective for water types 3 and 4
  • formulated with extra iron to promote greening
  • 100% water soluble
  • pure formulation—no ballast substances
  • contains NPK, magnesium and micronutrients
  • developed for peat-based cultures (pot plants, bedding plants and container nursery stock)
  • exclusive M-77 chelating formula for fast, efficient nutrient uptake

Rates for Peters Professional, 21-7-7, Acid Special

Weight (in ounces) of product needed to mix one gallon of concentrate

Target Fertilizer Concentration (N/ppm) After DilutionCommon Injector RatiosEC (mmhos/cm) of Target Feed Rate After Dilution
1:151:1001:1281:2001:300
25
50
75
100
125
150
175
200
250
300
350
400
450
500
600

*** Exceeds maximum solubility.

Gallons of water required to dissolve one 25lb. bag of fertilizer

Target Fertilizer Concentration (N/ppm) After DilutionCommon Injector RatiosEC (mmhos/cm) of Target Feed Rate After Dilution
1:151:1001:1281:2001:300
25
50
75
100
125
150
175
200
250
300
350
400
450
500
600

*** Exceeds maximum solubility.