21-7-7

High Acid Formula

Designed to give heavy acidifying action, especially for Azaleas grown under hard water conditions. This formula can also be used on material that has too high pH; it is not, however, intended for use where the pH is already too low. A few applications should bring the pH down to desirable levels and care should be taken not to drop the pH below optimum growing range.

Total Nitrogen (N)
9.05% Ammoniacal Nitrogen
11.95% Urea Nitrogen
21%
Available Phosphate(P205) 7%
Soluble Potash (K2O) 7%
Sulfur (S) (Combined) 13%
Magnesium (Mg) (Total)
0.05% Water Soluble Magnesium (Mg)
0.05%
Boron (B) 0.0068%
Copper (Cu)
0.0036% Chelated Copper (Cu)
0.0036%
Iron (Fe)
0.15% Chelated Iron (Fe)
0.15%
Manganese (Mn)
0.0031% Chelated Manganese (Mn)
0.0031%
Molybdenum (Mo) 0.01%
Zinc (Zn)
0.0025% Chelated Zinc (Zn)
0.0025%
  • Plant nutrients derived from:  Urea, Ammonium Sulfate, Ammonium Phosphate, Potassium Chloride, Magnesium Sulfate, Boric Acid, Copper EDTA, Iron DTPA, Manganese EDTA, Sodium Molybdate, Zinc EDTA.
  • Potential Acidity: 1,560 Lbs. Calcium Carbonate per ton.
  • Maximum Solubility: 3.75 Lbs. Per gallon.
  • Caution: Some crops may be injured by application of Boron.
  • Crops high in Molybdenum are toxic to ruminants

21-7-7 High Acid Injector Ratios

Ounces of EasyFertilizers 21-7-7 High Acid per gallon of concentrate.

Ppm Nitrogen 1:15 Injector Ratios 1:100 Injector Ratios 1:200 Injector Ratios EC (mS/cm)
50 0.48 3.22 6.44 0.28
100 0.95 6.44 12.9 0.56
150 1.45 9.65 19.3 0.84
200 1.93 12.9 25.7 1.12
250 2.41 16.1 32.2 1.4
300 2.9 19.3 38.6 1.68
350 3.38 22.5 45 1.96
400 3.86 25.7 51.5 2.24

21-7-7 High Acid Ratios by Crop Type

Crop Type Constant Feed Ppm – N Periodic Feed Ppm – N
Bedding Plants 100-200 200-250
Containerized Woody Ornamentals 75-125 200-350
Cut Flowers 175-225 300-450
Potted Chrysanthemums 250-350 350-400
Potted Tropical Foliage 125-250 250-300
Potted Geraniums 250-300 350-400
Potted Poinsettias 200-350 375-400
Vegetable Seedlings 25-75 75-150
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