Jack's Classic 20-20-20 All Purpose Fertilizer
JR Peters - Jack's Classic, Jack's Professional, Jack's Nutrients

Jack's Classic 20-20-20 All Purpose Fertilizer

FE-JP-202004

$165.34 $194.52 Save $29.18
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Works with

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)

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Customer Reviews

Based on 73 reviews
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J
John Schott (Gig Harbor, US)

My only comment is that you have a picture of a 4 lb. tub. I purchased 25lbs of it does that say anything of my feeling about your product???

L
Legacy Review
Good product

Very good product I use for my garden

L
Legacy Review
Would recommend

Great service, product and price!

L
Legacy Review
Great for Corn

I use Jack's 20/20/20 in a 15 gallon sprayer. I spray my corn once a week to keep it constantly fertilized with nitrogen. Nitrogen is the key to Great corn especially once it begins to tassel.

L
Legacy Review
Blue granules

Easy to mix. My plants and roses live it.

L
Legacy Review
Largo

We have used this for 30 years. Exceptional results. Wouldnt waste my money on anything else. Also use their bloom booster. Bigger blooms that last way longer. Look no further.

L
Legacy Review
Awesome Results

I purchased the 20-20-20 Fertilizer back in March of 2018 and used it primarily to spray the foliage on my Maple Trees , Cryptomerias and Flowering Plants, all I can say is that the Fall Color on my Maple Trees were a definite " Show Stopper" and all of my other trees and plants truly benefited from this product as well, I SURELY will be purchasing more of Jacks Fertilizer once I run out. "Thanks A Million"

L
Legacy Review
FANTASTIC PRODUCT

This product is Fantastic. I have a Variety of Tropical and Cajun Hibiscus Plants and theylet love this product. There,is always new growth of leaves whenever I use this product. My plants look healthier and stronger. Best Fertilizer I ever used, to see the results is Amazing!!!!!

L
Legacy Review
Jack's Is Where It's At

You will get premium product if used correctly. It's GREAT!

L
Legacy Review
20/20/20 fertilizer

I bought the 4lb. tub of Jack's 20/20/20 fertilizer for my annuals . I have used the Peter's fertilizer in the past with fabulous results & the Jack's product is doing a great job for me very quickly---I'm very impressed & it's so easy to use. The Greenhouse mega store is a nice place to buy products. Good stuff !

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