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Availability:
In Stock.
Arrives
Tuesday, Nov 17
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At a glance
- Condition
- New
- Weight
- 1.5 lb
- Item Form
- Powder
- Liquid Volume
- 1.5 Liters
- Coverage
- All
- Target Species
- Plants
- In the box
- 1 Fertilizer Tub
Features 5
- 20-20-20 Analysis - Great for providing fast green-up and rapid leaf expansion in all indoor and outdoor plants.
- Many Ways to Feed - All Purpose Fertilizer can be used as a foliar or root feeding product. Great for spraying directly onto leaves, roots, or when used in a continuous feed system.
- Water-Soluble Powder Powdered concentrates go further than liquid fertilizers. Simply mix your measured powder with water and you are ready to feed with multiple gallons of liquid fertilizer!
- Included Measuring Spoon All Jacks Classic fertilizers come with a convenient spoon to create the right amount of liquid fertilizer for your plants.
- Micronutrients - Added micronutrients supply your plant with the nutrition it needs for optimal growth and health. Unlike other fertilizers, additional feeding is not required.
Description
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.
Specs 15
| Brand | Jack's Classic |
|---|---|
| Item Weight | 1.5 Pounds |
| Item Form | Powder |
| Liquid Volume | 1.5 Liters |
| Specific Uses For Product | Plant Growth |
| Brand Name | Jack's Classic |
| Model Number | 52024 |
| Manufacturer | JR Peters |
| Number of Items | 1 |
| UPC | 671341520245 |
| Unit Count | 24.0 Ounce |
| Part Number | 207303 |
| Coverage | All |
| Target Species | Plants |
| Mixing Ratio | 0.444 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 17
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Give Jack's All Purpose 20-20-20 A Chance And Watch Your Plants Grow Up
PROS: * This stuff is amazing! I have been using Jacks for over a year on all my indoor and outdoor plants. They all have responded positively * Safe to use on food plants * Also use in spray bottles when misting leaves * A 1.5 lb container lasts a long time CONS: * Cannot think of any
Reviewed in the United States on April 30, 2026 by Greg Cass
Easy to use. More economical than most liquid fertilizers. Doesn't seem to cause chemical buildup. Easy to use. More economical than most liquid fertilizers. Doesn't seem to cause chemical buildup.
I grow most of our veggies and herbs in our large basement, and have been growing them under LED lighting for over 6 years. I had been using a liquid fertilizer that was much more costly and more difficult, and messy, to use. I use this formula primarily for the veggie greens and herbs. It also works well for cucumbers and beans. The liquid fertilizer I used was in gallon plastic bottles that needed to be shaken before each use because some of the components settled to the bottom. For these, I had to shake the gallon bottle before pouring into a small plastic cup. I used 10 cc's per gallon of water and had to mix the contents of the cup each time I took 10 cc's from it to add to the watering can. For the plants that I have, I used two different formulas, and used 1 gallon of each per month. The cost of these fertilizers was $56-$70 per gallon. Since I started using this fertilizer, I still use 2 formulas, and use two of the 1.5 lbs. containers of each per month for the same plants. Although 2 of these was costing $32, I found a 4 lb. container on Amazon for $25. This reduced the cost to less than half. So, if you are using this fertilizer, you need to shop to get the best price. Using this fertilizer is so much easier than using the liquid fertilizer. I use 1 tsp. per gallon, and it dissolves instantly - no shaking or mixing, just put it in the watering can and add water. Since using this fertilizer, my plants seem happier, and I am not seeing the mineral buildup on the pots that I was seeing when using the liquid fertilizers. I hope this review was helpful for you.
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Reviewed in the United States on November 4, 2023 Reviewed in the United States on November 4, 2023 by Judy L.
A good all round fertilizer
This is a good all round fertilizer that feeds just about everything in your garden from flowers and shrubs to lawns and citrus. Jack's makes specialty fertilizers if you need them so check out their website. The easiest way to use this is with a hose end sprayer and I use an Ortho dial n spray available from Amazon. The fertilizer comes in a blue powder that has to be dissolved to make a concentrate that will go through the sprayer and the recommendation is one tablespoon per gallon of water. So the sprayer needs to pull one tablespoon of the solution from the bottle for each gallon of water that comes out of the sprayer. You set the sprayer dial to one tablespoon since the sprayer will deliver water at a constant rate. To make the concentrate I use one tablespoon of powder to two tablespoons of water and usually weigh out the contents in a jug before adding it to the sprayer bottle. That would be 14grams/0.5oz of powder to 28grams/1.0oz of water. Use warm water and stir well to make sure the powder has dissolved. You can also remove the filter from the end of the sprayer pick up tube to ensure a better flow of the concentrated solution. Any less water in the mixture will probably result in a clogged pick up tube. It's best to spray either early morning or late afternoon once the heat of the sun has diminished. Spray plants at the drip line on soil that has previously just been watered to that the solution goes down into the soil to the feeder roots. And you can spray again with water after the fertilizer to wash it down further. Jacks is a root and foliar fertilizer so spray the leaves as well (but not in the heat of the day). Apply every two weeks or so to give your garden a real burst of spring energy.
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Reviewed in the United States on April 9, 2026 by Tom Foolery
Highly recommend
Second time buying this. Works great for my plants. Normal smell. Don't have to use much in size. Helps blooming
Reviewed in the United States on March 24, 2026 by Christina Helzer-Schneidermann
It Ain’t Supposed to be a Brick It Ain’t Supposed to be a Brick
Love the product. I use it on almost every single plant I grow. The only problem I’ve had was the product as delivered, and I don’t know if it was Amazon’s fault or the seller’s. But it arrived in the container as a solid brick instead of a powder, and I’m still trying to break it up. I’ll buy Jack’s 20-20-20 again but NOT THROUGH AMAZON!!
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Reviewed in the United States on April 17, 2026 Reviewed in the United States on April 17, 2026 by JLMG
Great Stuff!
Have used for years. Easy to use- 1 TBS of these very tiny granules/powder in 1 gal of water dilutes out to a light bright blue colored water. Slight fertilizer smell in the container it comes in, less to no smell when diluted. Typically see results/ improvement in 3-4 weeks. Have fed this to the majority of my plants and never had any burn - EVERYTHING from all blooming annuals, to tender perennials, to vegetable plants and strawberries to lilies and lilacs, and fig trees; plus every other blooming & budding plant I have. Even talked my son into using it on his new 4 tons of lawn/turf!. Health, increase in size/growth and green color and more continuing buds and blooms - just overall better growth! So worth the price. Great plant lover investment! Deliver was fine. NO breaks, cracks or leaks.
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Reviewed in the United States on July 26, 2023 by Chatalia
It works to make your plants healthier
This was recommended by the man I buy orchid plants from. I have only used it once on my pitcher plants and they already look healthier.
Reviewed in the United States on April 24, 2026 by Arthur Taylor
Brought my trees back to life!
Leafs on my trees that had bloomed died after a late freeze. I mix several gallons of jacks asper the instructions and what are my trees with it. New blooms appeared in a few days. How much do my delight?
Reviewed in the United States on May 22, 2026 by Horn