---
product_id: 67861012
title: "Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs"
brand: "jack's classic"
price: "€ 342.60"
currency: EUR
in_stock: true
url: https://www.desertcart.de/products/67861012-jacks-classic-nutrients-hydroponic-5-12-26-professional-fertilizer-part
store_origin: DE
region: Germany
---

# 5-12-26 Ratio Water-Soluble 25 lbs Power Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs

**Brand:** jack's classic
**Price:** € 342.60
**Availability:** ✅ In Stock

## Summary

> 🌿 Feed Your Green Dreams!

## Quick Answers

- **What is this?** Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs by jack's classic
- **How much does it cost?** € 342.60 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/67861012-jacks-classic-nutrients-hydroponic-5-12-26-professional-fertilizer-part)

## 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

- • **Hydroponic Ready:** Designed specifically for hydroponic systems, ensuring maximum growth.
- • **Effortless Mixing:** Just mix with water for a hassle-free feeding experience.
- • **Long-Lasting Supply:** 25 lbs of concentrated power means fewer trips to the store!
- • **Micronutrient Boost:** Packed with essential micronutrients for robust plant health.
- • **Optimal Nutrient Balance:** Achieve the perfect 5-12-26 nutrient ratio for thriving plants.

## Overview

Jack's ClassicNutrients Hydroponic 5-12-26 Professional Fertilizer Part A is a premium, water-soluble powder designed for hydroponic systems. With a balanced nutrient profile and added micronutrients, this 25 lbs fertilizer ensures optimal growth for greenhouse and controlled environment crops, making it a must-have for serious growers.

## Description

Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs

## Features

- 5-12-26 Analysis - Supplies a specific balance of macro, secondary, and micronutrients for many different growing environments and crop types.
- 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!
- Mixing Rate – Proper mixing ratios are supplied on the bag for optimal feeding.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Liquid Volume | 500 Milliliters |
| Item Weight | 25 Pounds |
| Specific Uses For Product | Hydroponic |
| Target Species | Greenhouse and Controlled Environment crops |
| Coverage | Full |
| Item Form | Powder |

## Product Details

- **Brand:** Jack's Classic
- **Item Weight:** 25 Pounds
- **Item Form:** Powder
- **Liquid Volume:** 500 Milliliters
- **Specific Uses For Product:** Hydroponic

## Images

![Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs - Image 1](https://m.media-amazon.com/images/I/71tIae-eNvL.jpg)
![Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs - Image 2](https://m.media-amazon.com/images/I/81Ey6gWVpoL.jpg)
![Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs - Image 3](https://m.media-amazon.com/images/I/81Ide+MxV2L.jpg)
![Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs - Image 4](https://m.media-amazon.com/images/I/71OM95J8LqL.jpg)
![Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs - Image 5](https://m.media-amazon.com/images/I/71Nm6dXEbtL.jpg)

## Questions & Answers

**Q: Is this product water soluable**
A: Yes it is. It is very soluable. 

I reccomended running it at these ragione.

Part A : 3g/gallon
Part B : 2g/ gallon
Epsom Salt: 1g/gallon 

And if you are using RO water, add 5ml/gallon Calimagic to this mix.  It works fangastic.

**Q: Are they organic?**
A: No

**Q: Do I need to add something to this if I am growing tomatoes (kratky method of hydroponics)?**
A: Yes, calcium nitrate must be dissolved separately. It is also called Jack's part B, or 15-0-0 (Ca-19%), use a greenhouse brand like jacks, Powergrow, or Yara. I have found the super cheap brands (eg southernAG, highYield) may be coated with insoluble goop, or otherwise contaminated.
The two parts must be diluted before mixing or the calcium and sulfur will form gypsum and gypsum is only mildly soluble so can settle out of a concentrate and is then very hard to redissolve.

**Q: can it be used in soil? If so at what rate?**
A: Absolutely...same rate as hydro is fine. If your using it for canna I increase slowly and like keeping it under 1000ppm cus I use dry amendments as well. Jack's also has a line of boosters

## Frequently Bought Together

- Jack's Classic Nutrients Hydroponic 5-12-26 Professional Fertilizer Part A, 25 lbs
- Jack's Classic Nutrients 15-0-0 Part B Water-Soluble Fertilizer for Calcium Uptake and Strong Leaf Growth in Continuous Liquid Feed Programs, 25Lbs

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-01-23*