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Description
soluble plant fertilizer Jack's Classic - All Purpose 20-20-20All Purpose 20 20 20 is considered the industry standard of general purpose fertilizers by professional growers. It feeds both through the roots and the leaves. This formula of nitrogen, phosphorus and potassium provides fast green up and rapid leaf expansion. Recommended for use on all your indoor and outdoor plants. Indoors it is especially effective on foliage plants, keeping leaves green. A proven performer in the vegetable garden for generations,
All Purpose 20-20-20 is considered the industry standard of general purpose fertilizers by professional growers. It feeds both through the roots and the leaves. This formula of nitrogen, phosphorus and potassium provides fast green-up and rapid leaf expansion. Recommended for use on all your indoor and outdoor plants. Indoors it is especially effective on foliage plants, keeping leaves green. A proven performer in the vegetable garden for generations, this product may be used in combination with Jack’s Classic Blossom Booster giving your plants greener leaves, more flowers and brighter colors.
- NPK: 20-20-20
- Water soluble plant food with micronutrients
- Use for all indoor and outdoor plants: bedding and container plants, trees and shrubs, vegetables, fruits and turf
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4.3 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Like
Format: Paperback
Can always use
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Reviewed in the United States on November 27, 2025
★★★★★ 5
Brand new
Format: Paperback
These books are brand new and love it. They have very good pictures and its very informative. Also gives guidance on when to take practice test after every introduction. My books were in good condition. I really needed this i already spend to much time on screen. Good to give eyes a break
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Reviewed in the United States on March 16, 2025
★★★★★ 5
Books arrived in fantasic shape.
Format: Paperback, Format: Paperback
I was worried about making the purchase due to other people having problems with miscut books and glued pages. I ordered the set of three and they are all in great shape. No miscuts or glued pages. Every page seems to be printed legibly. I'm very happy with my purchase. I didn't see any recent reviews so I thought this may help some of those hesitant to buy.
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Reviewed in the United States on August 4, 2024
★★★★★ 4
Good so far.
Format: Paperback
I will be using these heavily in a month or two, I ordered them because they were on sale so I will come back and edit once I actually read the material, use the glossary, online tools, etc.
However from out of the box? All the books are in perfect condition, no sticking pages like other reviews. I will say if you can afford the hardcover version with the labs? Get those.
From touching them once or twice so far, this book will not stand up to constant use. It's a really flimsy type.. not even sure if it's paper? It feels like plastic paper.
I will also add that that study guide book is F A T . I wish they would have split it into two. I bet the hardcover is gigantic because mine looks like the biggest dictionary you've seen, and I know the cover page which is almost exactly like the pages? Will be ruined once it starts being used consistently.
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Reviewed in the United States on December 16, 2022
★★★★★ 5
As described
Format: Paperback
As described - I'm happy
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Reviewed in the United States on July 28, 2025