growing 1 indica plant was growing great still in veg.stage .well 2 days ago i added some ground up egg shells and ground up banana peals to the soil mixing it in about 3-4 inches.today when i watered i noticed a lot of yellowing and tips of the leafs turning brown and brittle.i think i may have messed up the roots! what can i do? did i just kill my plant?? HELP!!!!