SKU: 13381466808
jack's house plant fertilizer

jack's house plant fertilizer Jack's Classic Water-Soluble 20-20-20 Fertilizer – Greenhouse Megastore

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Description

jack's house plant fertilizer Jack's Classic Water-Soluble 20-20-20 Fertilizer – Greenhouse MegastoreWith 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:
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  • 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: 13381466808

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Happytipp
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Great treat!
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Wonderful treat for my Corsos! They also easily break apart if they need just a small goodie 🙂 I've had these on Subscribe & Save for over a year now.
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Reviewed in the United States on April 17, 2026
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Heather S (inkedrt)
Lowell, US
★★★★★ 5
Poochie love
Flavor Name: Peanut Butter, Size: 55 Count (Pack of 1)
My dogs LOVE these SO much! Great quality for some cute, pampered poochies!
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Reviewed in the United States on March 13, 2026
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Leilani
Phoenix, US
★★★★★ 5
My dogs say these are five stars (and they’re the real bosses here)
Flavor Name: Peanut Butter, Size: 55 Count (Pack of 1), Flavor Name: Peanut Butter, Size: 55 Count (Pack of 1)
I was a little worried these treats might be teeny tiny, but they’re actually the perfect size for my 10 and 13-pound rescue Chihuahuas. They love them so much that if I even touch the bag, they come running like it’s the ice cream truck for dogs. The texture is great — chewy but not too hard — and they keep the pups busy for a little while. I also like that they’re rawhide-free and easy to digest. The peanut butter smell must be amazing to them because they act like it’s the best thing they’ve ever tasted (and honestly, judging by their excitement, maybe it is). I’ve officially learned that I’m not allowed to open this bag unless I’m ready to hand out treats immediately — no exceptions!
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Reviewed in the United States on October 13, 2025
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Kara
Louisville, US
★★★★★ 4
Dogs like them
Flavor Name: Peanut Butter, Size: 55 Count (Pack of 1)
My dogs like these, but they're not quite what I expected. They're very thin and oddly flexible. By advertising they were "rawhide free" I assumed they'd be a little longer lasting (like a rawhide replacement). It's not a big deal because they're not expensive, but they don't last long once I give them to my dogs. I don't like the smell much, but I'm pregnant and more smell-sensitive than most now. My husband doesn't seem as bothered by the smell, so they might not be too bad for most people. The smell isn't bad enough that I wouldn't repurchase, but I think I'd probably choose something else since they don't last long and I was looking for something to keep the dogs busy for at least a few minutes.
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Reviewed in the United States on May 21, 2023
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MakeChanges
Waukegan, US
★★★★★ 5
Shih Tzu and schnauzer approved
Flavor Name: Peanut Butter, Size: 55 Count (Pack of 1)
My babies are grown teenagers now so now I spoil my dogs. I have amazing episodes of Shih Tzu and schnauzer and these girls live like royalty. They love these fact I get treats from Amazon so often that when the Amazon man comes, they go crazy because they think the boxes are for them.. I think dogs need variety and my girls are living their best lives.
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