I use master blend 4-18-38 npk
Calcium nitrate 15.5-0-0
Magnesium sulfate I.e. epsom salt
12 grams mb
12 grams CaNO8
6 grams epsom salt for 5 gallon mix..
The tomato fertilizer has all the micro nutrients needed and the ppm is pretty consistent. Just keep an eye on your ph and add fresh water as...