---
product_id: 7920572
title: "Jack's Professional 20-20-20 General Purpose Water-Soluble Fertilizer with Micronutrients for Heavy Feeding Plants in Continuous Liquid Feed Programs, 25lbs"
brand: "jack's classic"
price: "€ 341.86"
currency: EUR
in_stock: true
reviews_count: 9
category: "Jack's Classic"
url: https://www.desertcart.es/products/7920572-jacks-professional-20-20-20-general-purpose-water-soluble-fertilizer
store_origin: ES
region: Spain
---

# Micronutrients for optimal plant health Water-soluble powder for easy mixing Balanced 20-20-20 NPK ratio Jack's Professional 20-20-20 General Purpose Water-Soluble Fertilizer with Micronutrients for Heavy Feeding Plants in Continuous Liquid Feed Programs, 25lbs

**Brand:** jack's classic
**Price:** € 341.86
**Availability:** ✅ In Stock

## Summary

> 🌿 Feed like a pro, grow like a legend!

## Quick Answers

- **What is this?** Jack's Professional 20-20-20 General Purpose Water-Soluble Fertilizer with Micronutrients for Heavy Feeding Plants in Continuous Liquid Feed Programs, 25lbs by jack's classic
- **How much does it cost?** € 341.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/7920572-jacks-professional-20-20-20-general-purpose-water-soluble-fertilizer)

## Best For

- jack's classic enthusiasts

## Why This Product

- Trusted jack's classic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Application:** Ideal for soil, soilless, foliar sprays, and hydroponic systems—grow like a pro anywhere.
- • **Effortless Liquid Feeding:** Water-soluble powder lets you create gallons of nutrient-rich feed on demand.
- • **Complete Micronutrient Boost:** Chelated trace elements ensure your plants get all essential nutrients without extra fuss.
- • **Precision Balanced Nutrition:** Perfect 1:1:1 NPK ratio fuels rapid green-up and robust growth.
- • **Trusted by Experts & Enthusiasts:** Top-rated formula with 4.6 stars and glowing reviews for transforming gardens and crops.

## Overview

Jack's Professional 20-20-20 is a premium, water-soluble fertilizer powder with a perfectly balanced nitrogen, phosphorus, and potassium ratio, enhanced with chelated micronutrients. Designed for continuous liquid feeding, it supports fast green-up, vigorous leaf expansion, and healthy root development across a wide range of plants and growing systems. Trusted by professional growers and home gardeners alike, this 25-pound powerhouse delivers versatile, efficient nutrition for thriving gardens and crops.

## Description

The general purpose fertilizer 20-20-20 is great for maintaining plants in garden center and growing facilities. It provides fast green up and great foliar expansion due to the high percentage of ammonium and urea nitrogen plus balanced phosphorus and potassium for excellent root and shoot growth. Available in 25-pound bag.

Review: By far the best "All Purpose" fertilizer on the market! - I've been using Jack's Professional aka Jack's Classic All Purpose 20-20-20 for many years. You can water virtually all of your garden with this fertilizer! I use it for both outdoor & indoor plants. I've even used it to revive part of my yard that was dying! It can also be used in both soil & soilless mediums. If you are unsure on how much you should use 1/2 of recommended dose is a good start. If your plants start to claw you are feeding them too much. If they start to fade in color you can probably feed them a little more. You can also use this as a foliage spray (use about .25 normal dose). If your plants are turning yellow or fading in color this will brighten them back up again! It's a shame this is not sold anywhere where I live. Here's a little info from J.R. Peters site that you might find useful: Jack's All Purpose 20-20-20 Just as the name suggests, Jack's All Purpose 20-20-20 is a balanced formula applicable to a variety of growing material. Its 1:1:1 nutrient ratio makes it good for almost any stage of plant growth. The design of the formula uses nutrients that provide strength to the plant, as well as, lush green growth. It can be used as a constant liquid feed or periodic feed, alternating with water or rain to provide the plant with a boost of balanced nutrition. Preferably, it should be used on soil-based media, rather than on soilless media, primarily during warmer months, indoors or in warm-climate regions. These environments allow the roots to take up the nitrogen sources most effectively. Long-term use of high Phosphorus formulas can lead to plant stretch in some plant varieties. Therefore, it is recommended when using this formula over long periods (greater than 3-4 months) of plant growth, alternate with a lower Phosphorous source such as rainwater, calcium nitrate or other lower phosphorus fertilizers. Application of this fertilizer can be used as a root drench or foliar spray. The nutrient package in the All-Purpose 20-20-20 is designed for optimum absorption by the leaves when sprayed at the recommended rates; however, a root drench is just as effective and will leave little to no salt build up in the media. All Purpose 20-20-20 can be used on many types of plants including, but not limited to: Orchids (all varieties) both blooming and in vegetative state Use All Purpose 20-20-20 for Apples Cyclamen Hibiscus Citrus trees Chrysanthemums All bedding plants Hanging baskets Mixed containers Petunias & Calibrachoas Gardenia Bromeliads Roses All types of Berries Sunflower Tomatoes All vegetables Regular and Giant Pumpkins Home lawns Commercial turf grass Hay and forage plots ------------------------------------- All Purpose 20-20-20 is our biggest seller for home professional grower formulas. It is widely used in a variety of settings from bedding plants, vegetable gardens, fruit trees, nursery materials including, trees, shrubs and container plants. In addition, the All-Purpose 20-20-20 is used extensively in conjunction with spray materials for foliar feeding of ornamental and shade trees, turf and hay field applications in the same manner. It is an excellent material for feeding foliage plants. How to use For small volume mixing Dissolve the following amounts in 1 gallon of water. An injector should not be used.All Purpose 1/2 tsp. = 125 ppm 1 tsp. = 250 ppm 1 tbsp. = 750 ppm When using a Siphonex or Hoze-on proportioner 1:15 setting E.C. 100 ppm = 1.0 oz. 0.64 200 ppm = 2.0 oz. 1.28 300 ppm = 3.0 oz. 1.92 Limit of Solubility in Hot Water = 3.5 lbs. per gallon Jack's Fertilizers are made with 100% soluble raw materials that will form a true solution. ------------------------- 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) 0.10% 0.10% 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) What The Numbers Mean More professional growers use this product for all their growing needs more than any other formula. A blend of Nitrogen, Phosphorus and Potassium in a 1:1:1 ratio that work well on all plant materials as a general-purpose fertilizer. Fully chelated trace elements. Manganese, Iron, Copper, Boron, Zinc and Molybdenum are the trace or micronutrients. All Jack's Classic® products contain these trace elements. Although they are present in small amounts, they are just as important as the major and minor elements in the growing process. Feeds through the roots and leaves Indoors, it is especially effective on foliage plants to keep leaves green and healthy. The guaranteed analysis on each package of fertilizer tells you how much is in each product. Jack's Classic products contain these elements in a highly soluble form, which means they will go completely into solution in water. When applied to your plants, they will be absorbed and utilized to make your plants grow to their fullest potential. Fertilizer Analysis Peppers tomatoes 20-20-20 Container Type Containers: 8 oz., 1.5 lbs., 4 lbs. Resealable pouch with handle: 10 lbs. All Jack's Classic products come with a free measuring spoon for precise and accurate product application as well as detailed instruction in each container. All Purpose 20-20-20 is our biggest seller for home professional grower formulas. It is widely used in a variety of settings from bedding plants, vegetable gardens, fruit trees & nursery materials (ex: trees, shrubs and container plants.) In addition, the All-Purpose 20-20-20 is used extensively in conjunction with spray materials for foliar feeding of ornamental and shade trees as well as turf and hay field applications, in the same manner. It is an excellent material for feeding foliage plants.
Review: This Product works well - I really love this product. works well for me in combination with the Alaskan Fish Fertilizer. The growth, amount of blooms and the beautiful green leaves of my squash, Zucchini, cucumbers and tomatoes are amazing. It has totally turned my sad Garden into a beautiful more productive Garden and I'm loving it.

## Features

- 20-20-20 Analysis - Great for providing fast green-up and rapid leaf expansion in all outdoor grown plants.
- 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!
- Micronutrients - Added micronutrients supply your plant with the nutrition it needs for optimal growth and health. Unlike other fertilizers, additional feeding is not required.
- Continuous Liquid Feed Program – Intended for use with hydroponic systems. Mixing instructions by volume included.
- Fertilizer appearance may vary in color due to variation in raw material size and tracer dye distribution upon the particles in the bag.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00178M6V0 |
| Best Sellers Rank | #29,414 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #804 in Garden Fertilizers |
| Brand | Jack's Classic |
| Customer Reviews | 4.6 4.6 out of 5 stars (611) |
| Global Trade Identification Number | 00671341770107 |
| Is Discontinued By Manufacturer | No |
| Item Form | Powder |
| Item Weight | 25 pounds |
| Item model number | 77010 |
| Liquid Volume | 11829.4 Milliliters |
| Manufacturer | JR Peters |
| Number of Items | 1 |
| Product Dimensions | 1 x 1 x 1 inches |
| UPC | 848264001025 671341770107 |
| Unit Count | 400.0 Ounce |

## Product Details

- **Brand:** Jack's Classic
- **Global Trade Identification Number:** 00671341770107
- **Item Form:** Powder
- **Item Weight:** 25 Pounds
- **Liquid Volume:** 11829.4 Milliliters

## Images

![Jack's Professional 20-20-20 General Purpose Water-Soluble Fertilizer with Micronutrients for Heavy Feeding Plants in Continuous Liquid Feed Programs, 25lbs - Image 1](https://m.media-amazon.com/images/I/71ECjsA7GeL.jpg)

## Questions & Answers

**Q: Can this product be applied to grass lawn using a Broadcast spreader?**
A: I don't believe so! Used mostly in greenhouses. Add it to water.

**Q: Does this have to be mixed with water before applying or can you just sprinkle some around the base of the plant?**
A: I used it in a hydroponics setup so of course it was dissolved in water.  I don't see why you could  not sprinkle a very thin layer on the surface or mix into the soil. I am just not sure why you would want to use a water soluble fertilizer in that manner. The directions on mixing are based on ratios of fertilizer to water.  But give it a try. What can you lose.

**Q: Could I use this in my earthbox fertilizer strip?  Or would it be too potent?**
A: Just mix at half strength if your worried about being to strong

**Q: would this be good to use on a one acre food plot ?**
A: No, it appears the cost would be prohibitive - since you aplly this stuff every 7 to 14 days and 1 pound covers about 400 square feet - to cover one acre (approx. 43,500 feet) would then take about 100# every 7 to 14 days.

## Customer Reviews

### ⭐⭐⭐⭐⭐ By far the best "All Purpose" fertilizer on the market!
*by J***J on December 10, 2014*

I've been using Jack's Professional aka Jack's Classic All Purpose 20-20-20 for many years. You can water virtually all of your garden with this fertilizer! I use it for both outdoor & indoor plants. I've even used it to revive part of my yard that was dying! It can also be used in both soil & soilless mediums. If you are unsure on how much you should use 1/2 of recommended dose is a good start. If your plants start to claw you are feeding them too much. If they start to fade in color you can probably feed them a little more. You can also use this as a foliage spray (use about .25 normal dose). If your plants are turning yellow or fading in color this will brighten them back up again! It's a shame this is not sold anywhere where I live. Here's a little info from J.R. Peters site that you might find useful: Jack's All Purpose 20-20-20 Just as the name suggests, Jack's All Purpose 20-20-20 is a balanced formula applicable to a variety of growing material. Its 1:1:1 nutrient ratio makes it good for almost any stage of plant growth. The design of the formula uses nutrients that provide strength to the plant, as well as, lush green growth. It can be used as a constant liquid feed or periodic feed, alternating with water or rain to provide the plant with a boost of balanced nutrition. Preferably, it should be used on soil-based media, rather than on soilless media, primarily during warmer months, indoors or in warm-climate regions. These environments allow the roots to take up the nitrogen sources most effectively. Long-term use of high Phosphorus formulas can lead to plant stretch in some plant varieties. Therefore, it is recommended when using this formula over long periods (greater than 3-4 months) of plant growth, alternate with a lower Phosphorous source such as rainwater, calcium nitrate or other lower phosphorus fertilizers. Application of this fertilizer can be used as a root drench or foliar spray. The nutrient package in the All-Purpose 20-20-20 is designed for optimum absorption by the leaves when sprayed at the recommended rates; however, a root drench is just as effective and will leave little to no salt build up in the media. All Purpose 20-20-20 can be used on many types of plants including, but not limited to: Orchids (all varieties) both blooming and in vegetative state Use All Purpose 20-20-20 for Apples Cyclamen Hibiscus Citrus trees Chrysanthemums All bedding plants Hanging baskets Mixed containers Petunias & Calibrachoas Gardenia Bromeliads Roses All types of Berries Sunflower Tomatoes All vegetables Regular and Giant Pumpkins Home lawns Commercial turf grass Hay and forage plots ------------------------------------- All Purpose 20-20-20 is our biggest seller for home professional grower formulas. It is widely used in a variety of settings from bedding plants, vegetable gardens, fruit trees, nursery materials including, trees, shrubs and container plants. In addition, the All-Purpose 20-20-20 is used extensively in conjunction with spray materials for foliar feeding of ornamental and shade trees, turf and hay field applications in the same manner. It is an excellent material for feeding foliage plants. How to use For small volume mixing Dissolve the following amounts in 1 gallon of water. An injector should not be used.All Purpose 1/2 tsp. = 125 ppm 1 tsp. = 250 ppm 1 tbsp. = 750 ppm When using a Siphonex or Hoze-on proportioner 1:15 setting E.C. 100 ppm = 1.0 oz. 0.64 200 ppm = 2.0 oz. 1.28 300 ppm = 3.0 oz. 1.92 Limit of Solubility in Hot Water = 3.5 lbs. per gallon Jack's Fertilizers are made with 100% soluble raw materials that will form a true solution. ------------------------- 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) 0.10% 0.10% 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) What The Numbers Mean More professional growers use this product for all their growing needs more than any other formula. A blend of Nitrogen, Phosphorus and Potassium in a 1:1:1 ratio that work well on all plant materials as a general-purpose fertilizer. Fully chelated trace elements. Manganese, Iron, Copper, Boron, Zinc and Molybdenum are the trace or micronutrients. All Jack's Classic® products contain these trace elements. Although they are present in small amounts, they are just as important as the major and minor elements in the growing process. Feeds through the roots and leaves Indoors, it is especially effective on foliage plants to keep leaves green and healthy. The guaranteed analysis on each package of fertilizer tells you how much is in each product. Jack's Classic products contain these elements in a highly soluble form, which means they will go completely into solution in water. When applied to your plants, they will be absorbed and utilized to make your plants grow to their fullest potential. Fertilizer Analysis Peppers tomatoes 20-20-20 Container Type Containers: 8 oz., 1.5 lbs., 4 lbs. Resealable pouch with handle: 10 lbs. All Jack's Classic products come with a free measuring spoon for precise and accurate product application as well as detailed instruction in each container. All Purpose 20-20-20 is our biggest seller for home professional grower formulas. It is widely used in a variety of settings from bedding plants, vegetable gardens, fruit trees & nursery materials (ex: trees, shrubs and container plants.) In addition, the All-Purpose 20-20-20 is used extensively in conjunction with spray materials for foliar feeding of ornamental and shade trees as well as turf and hay field applications, in the same manner. It is an excellent material for feeding foliage plants.

### ⭐⭐⭐⭐⭐ This Product works well
*by S***E on June 8, 2025*

I really love this product. works well for me in combination with the Alaskan Fish Fertilizer. The growth, amount of blooms and the beautiful green leaves of my squash, Zucchini, cucumbers and tomatoes are amazing. It has totally turned my sad Garden into a beautiful more productive Garden and I'm loving it.

### ⭐⭐⭐⭐⭐ THE PLANTS ARE LOVING JACK!!
*by J***S on July 4, 2025*

We bought this fertilizer a while back for the garden vegetables, and the flowers (gotta take care of those pollinators). All the plants seem to be doing better with this vegetables miracle grow. A tablespoon per gallon of water. Amazon has the better deals than other places. My shipping was free!! Jack's triple 20 is a staple in our gardening world now!!

## Frequently Bought Together

- Jack's Professional 20-20-20 General Purpose Water-Soluble Fertilizer with Micronutrients for Heavy Feeding Plants in Continuous Liquid Feed Programs, 25lbs
- Alaska Fish Emulsion Fertilizer 5-1-1 Concentrate 1 Gallon (Packaging may vary)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.es/products/7920572-jacks-professional-20-20-20-general-purpose-water-soluble-fertilizer](https://www.desertcart.es/products/7920572-jacks-professional-20-20-20-general-purpose-water-soluble-fertilizer)

---

*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-28*