yo blades. Can I use Andrews salts (basically the same as Epsom (high mg and acidic)) right until harvest or should I flush first? My plants have a mg deficiency (see other post) and I use it to bring the ph down too Thanks ya'll Sent from my C5303 using Grasscity Forum mobile app
Not the same thing. Took me 12 seconds to look that up. Epsom is magnesium sulfate. That Andrews salts also has sodium bicarbonate - which is baking soda. So don't use it unless you want your soil to foam and become a block of glue. A 3 lb bag of Epsom is $3 or $4 at any pharmacy.