SKU: 51274963233

Jack's Classic 20-20-20

Sale price$22.49 Regular price$24.99
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Description

Jack's Classic 20-20-20With 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.

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.

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)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 51274963233

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T. Hidalgo Nava
Alexandria, US
★★★★★ 4
Great shirt, unfortunately wrong size
Color: Royal Azure, Size: Medium
I bought the royal blue azure variety, and I really love the color. I also really liked the material, it feels light and silky. It works great as both a casual and semi-formal button up. Unfortunately, the shirt was too big, hence the 4 star rating. I am usually a size M, but this shirt was very long, reaching almost the halfway point of my thighs. I think you would be better off ordering a size below. For this color, they didn't have any smaller size, though, which is sad because I really liked the shirt otherwise.
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Reviewed in the United States on March 16, 2026
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Thomas
Waukegan, US
★★★★★ 5
Great value
Color: Grayish Blue, Size: Large
Nice shirt, runs a little small. The fabric is nice and the color was great. I am very pleased with this purchase. Probably will buy several more in different colors.
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Reviewed in the United States on May 22, 2026
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Amazon Customer
Phoenix, US
★★★★★ 5
Classy button shirt for dress up or casual occassions
Color: White, Size: XX-Large
I love the COOFANDY button down shirts!! They are soft, fit well, perfect length, maintain their color, and can be worn for casual or a fancy night out on the town. I’ve bought (4) of these so far.
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Reviewed in the United States on May 26, 2026
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Roy
Belleville, US
★★★★★ 5
Comfort
Color: Grayish Blue, Size: X-Large
The only thing I would change about these shirts and I've bought 9 now is the extra button they give you comes on the tag and not on the shirt like I'm used to so I lost the buttons. And I have a shirt that's missing a button now. But overall definitely a good shirt fits how you would expect. And is not cut overly short like a lot of dress shirts are nowadays
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Reviewed in the United States on June 2, 2026
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Painters Haven
Port Orchard, US
★★★★★ 5
Great button up
Size: X-Large, Color: Blue White 168
This is a very nice button up foe my husband. The fit was true to size and makes a great church shirt that looks nice with slacks or jeans. Seems well made too.
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Reviewed in the United States on May 1, 2026

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