This is an ideal fertilizer for acid-loving plants in the nursery and landscape. Provides a rapid correction of a high pH situation. Unlike other brands, Jack's 21-7-7 Acid contains no harmful chlorides.
For Use On: Acid loving plant in nursery and landscape, such as rhodendrons, azaleas, and evergreens
Jacks Professional 21-7-7 Acid Water Soluble Fertilizer Guaranteed Analysis
- Total Nitrogen (N)......21%
- 11.47% Ammoniacal Nitrogen
- 9.53% Urea Nitrogen
- Available Phosphate (P205)......7%
- Available Potash (K20).......7%
- Magnesium (Mg).......0.7%
- 0.7% Water Solulble Magnesium (Mg)
- Sulfur (S)........15%
- Boron (B)........0.0068%
- Copper (Cu)........0.0036%
- 0.0036% Chelated Copper (Cu)
- Iron (Fe)........0.15%
- Manganese (Mn)........0.025%
- 0.0036% Chelated Manganese (Mn)
- Molybdenum (Mo).......0.0009%
- Zinc (Zn).......0.0025%
Derived From: Urea, Ammonium Sulfate, Monoammonium Phosphate, Potassium Sulfate, Magnesium Sulfate, Boric Acid, Iron EDTA, Manganesse EDTA, Zinc EDTA, Copper EDTA, Amoonium Molybdate
Elemental Concentraion
| 100 ppm N Solution Contains the Following Elemental ppm |
| Nitrate - N (NO3) |
0.0 |
| Ammonium - N (NH4) |
54.6 |
| Urea - N (Urea) |
45.5 |
| Phosphorus (P) |
14.5 |
| Potassium (K) |
27.7 |
| Calcium (Ca) |
0.0 |
| Magnesium (Mg) |
3.3 |
| Boron (B) |
0.032 |
| Copper (Cu) |
0.017 |
| Iron (Fe) |
0.714 |
| Manganese (Mn) |
0.119 |
| Molybdenum (Mo) |
0.004 |
| Zinc (Zn) |
0.0.12 |
Mixing Instructions
Chart displays the amount of dry fertilizer (oz.) to add to each gallon of water to make a concentrated solution. Please check your injector setting before use.
Mixing Table
| Desired N Feed Rate |
1:15 |
1:100 |
1:200 |
E.C. Value |
| 50 ppm |
0.48 |
3.22 |
6.43 |
0.30 |
| 100 ppm |
0.96 |
6.43 |
12.86 |
0.60 |
| 200 ppm |
1.93 |
12.86 |
25.72 |
1.20 |
Limit of Solubility = 4 lbs per gallon
Important Notes:
E.C. value is the best method to determine fertilizer strength. Fertilizer appearance may vary in color due to variation in raw material size and tracer dye distribution upon the particles in the bag. In solution, color will remain consistent.
For best results, use warm water to dissolve product. Jack's fertilizers are made with 100% soluble raw materials that will form a true solution. Some raw materials are slower to dissolve than others. Keep stock tank covered to reduce light and debris inputs.
