Jack’s Nutrients – Magnesium Sulfate

Magnesium Sulfate

Jack’s Magnesium Sulfate is the finest quality Magnesium Sulfate heptahydrate available for hydroponic and commercial food products.

Recommended for use with Jack’s 321

What is #Jacks321? Have you read about Jack’s 321 or seen the hashtag on Instagram?

Jack’s 321 is our tried and true two-part fertilizer program. It consists of Jack’s Nutrients Part A  5-12-26, Jack’s Nutrients Part B 15-0-0,  and Epsom Salts. BUT where does that “321” come from, you ask? It’s the shortened amount of each fertilizer in grams per gallon.

​

To mix up the perfect blend of Jack’s 321 you will need:

3.6 grams Part A

2.4 grams Part B

1.1 grams of Epsom salts

​

This will give you a blend of nutrients for growing almost any controlled environment crop, in any growing system. The order of additions is VERY important. You must add the 5-12-26 first and make sure it is completely dissolved, then add in the Epsom salts making sure it is completely dissolved, then finally the calcium nitrate.