With Jack's 20-20-20, you can improve growth in almost any situation - any plant, any stage, any weather. This all-purpose fertilizer has a 1:1:1 NPK ratio with 20% each of nitrogen, phosphate and potash plus trace nutrients such as iron and manganese to promote larger, greener growth. Use it from the start or to "green up" existing plants. The water-soluble formula makes mixing it easy for liquid feed either directly to the roots or on the leaves.
From bedding plants and perennials to fruits, vegetables, trees and turfgrass, Jack's Classic 20-20-20 Fertilizer is the right feed. Though you can use Jack's fertilizer in an array of conditions, warmer temperatures are recommended so plants can make better use of the nitrogen. The manufacturer also suggests alternating with a fertilizer lower in phosphorus to prevent plant stretch over extended periods. Stock up at Greenhouse Megastore with free shipping on qualifying orders.
Jack's All-Purpose Fertilizer Features:
- Versatile 1:1:1 NPK ratio.
- Easily dissolves in water for spraying and fertigation.
- Ideal for warmer weather and indoor plants.
- Sold in four-pound tubs (single or case of six).
How to Use
For small volume mixing
Dissolve the following amounts in 1 gallon of water. An injector should not be used.
1/2 tsp. = 125 ppm
1 tsp. = 250 ppm
1 tbsp. = 750 ppm
Stock Solution
To make a STOCK concentrated solution for use with a fertilizer proportioner. Dissolve the following amounts of fertilizer per 1 gallon of stock water.
| Stock Solution |
100 ppm |
200 ppm |
300 ppm |
| 1:100 (1%) setting |
6.8 oz. |
13.5 oz. |
20.3 oz. |
| E.C. |
0.42 |
0.84 |
1.2 |
| 1:200 (0.5%) setting |
13.5 oz. |
27 oz. |
40.5 oz. |
| E.C. |
0.42 |
0.84 |
1.2 |
| 1:15 setting* |
1 oz. |
2 oz. |
3 oz. |
| E.C. |
0.42 |
0.84 |
1.2 |
| *When using a Siphonex or Hoze-on proportioner |
Limit of Solubility in Hot Water = 3.5 lbs. per gallon.
Additional Information
Jack's All-Purpose MSDS (PDF)
Specifications
| Total Nitrogen (N)....................................... |
20% |
|
2.1% Nitrate Nitrogen
17.9% Urea Nitrogen
|
|
| Available Phosphate (P2O5)....................... |
20% |
| Soluble Potash (K2O)................................. |
20% |
|
|
| Boron (B).................................................... |
0.02% |
| Copper (Cu)................................................ |
0.05% |
|
0.05% Chelated Copper (Cu) |
|
| Iron (Fe)...................................................... |
0.1% |
|
0.1% Chelated Iron (Fe) |
|
| Manganese (Mn)......................................... |
0.05% |
|
0.05% Chelated Manganese (Mn) |
|
| Molybdenum (Mo)....................................... |
0.0009% |
| Zinc (Zn)...................................................... |
0.05% |
|
0.05% Chelated Zinc (Zn) |
|
