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Old November 3, 2019   #20
Join Date: May 2009
Location: Madison, OH, zone 6
Posts: 310

Originally Posted by AKmark View Post
You guys need to follow the directions with these products or you are going to have issues. For mature plants you use 8 oz of 4-18-38, as well as 8 oz of Calcium Nitrate, you will also add 4-5 ounces of Magnesium Sulfate. (for 100 gallons)
These numbers they give are just not guessed, but are based off of leaf samples, so follow the directions to start with. You may have to adjust, I need a touch more MgSO4.

These numbers represent the Masterblend directions and Hydrogardens Tomato Formula. Same stuff.
Yeah, what he said ! Most definitely
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