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fert question

i just slapped the miracle grow to my plants yesterday.and now i have found out the issue with my long term problem of my plants having wavy leaves they need calcium.my question is will it hurt to give them calcium today since i gave them miracle grow yesterday?the last thing i wanna do is burn these guys
 
I doubt it would hurt them as long as you aren't introducing identical ferts and thus accumulating soil nutrients... the most that would happen is that the new solution would displace the older solution currently residing in the pore spaces, as well as potentially remobilizing some of the soil nutrients currently bonded with the substrate.

Soil chemistry is messy business... it's more economical to give your plants all they need in one go, otherwise you run the risk of depleting the soil of certain nutrients through cation exchange with consecutive feedings.
 
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