Superthrive contains too much nitrogen for seedlings, causing them to scorch. What you are describing doesn't sound like Mg def at all, simply fert burn.
stinkyattic Reviewed by stinkyattic on . Argg... WHAT could possibly be causing this, i need a defecency detective! Ok theres only SO many things that can be groing wrong with seedlings at this age... and ive done everything how i should have but i cant quite figar this out... its my first grow. I think i have narrowed it down, and would like some info, sorry pics cant be present. I have 7 seedlings that are approximatly 14 days old, however they are nowhere the size of most 14 day old plants i see on here, and the ones on this site that are that size either have a defecency, or crappy Rating: 5