Is this product water soluable

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.

Do I need to add something to this if I am growing tomatoes (kratky method of hydroponics)?

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.

can it be used in soil? If so at what rate?

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

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

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

Product ID: 67861012

Details

Brand
Jack's Classic
Item Form
Powder
Item Weight
25 pounds
Liquid Volume
500 ml
Specific Uses For Product
Hydroponic

🌱micronutrient-enriched for optimal growth

💧water-soluble powder for easy mixing

⚖️5-12-26 precise nutrient ratio

164172 Ft

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Description

🌿 Feed your future: Grow smarter, not harder with Jack’s Nutrients!

HYDROPONIC READY - Designed specifically for continuous liquid feed systems in controlled environments.
EFFORTLESS MIXING - Water-soluble powder lets you create gallons of potent fertilizer on demand.
ALL IN ONE MICRONUTRIENTS - No extra feeding needed—complete nutrition in every dose.
PRECISION NUTRIENT BALANCE - Tailored 5-12-26 formula fuels robust leaf and root development.
TRUSTED PROFESSIONAL GRADE - Backed by 4.8-star reviews and top rankings in garden fertilizers.

Jack's Nutrients 5-12-26 Hydroponic Professional Fertilizer Part A is a 25lb water-soluble powder designed for hydroponic systems. It delivers a precise balance of macro and micronutrients to promote vigorous leaf growth and strong roots, eliminating the need for additional micronutrient feeding. Ideal for greenhouse and controlled environment crops, it supports continuous liquid feeding with easy-to-follow mixing instructions.

Specifications

ASIN	B07CWXTJ6X
Best Sellers Rank	#73,813 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,556 in Garden Fertilizers
Brand Name	Jack's Classic
Coverage	Full
Customer Reviews	4.8 4.8 out of 5 stars (390)
Item Form	Powder
Item Highlight	Part 1 of a 2-Step System, Targeted Micronutrient Package, Boosts Leaf Growth and Promotes Strong Roots
Item Type Name	Fertilizer
Item Weight	25 pounds
Liquid Volume	500 ml
Manufacturer	JR Peters
Model Number	79030
Number of Items	1
Part Number	79030
Specific Uses For Product	Hydroponic
Target Species	Greenhouse and Controlled Environment crops
UPC	671341790303
Unit Count	400 Ounce

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164172 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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