Woke up this morning and seen this appear at the bottom of the stem. Is this normal or is there a way to cure it quickly. im using miracle gro potting mix ( i know, i know). Says it feeds plants up to 3 months. 2 days ago i bought peters all purpose plant food . since its almost been 2 months and leaves look alittle yellow.. on bag of maricale grow ingrediets list as (n) .21 percent, anomiacal nitrogen 0.12%, nitrate nitrogen 0.09%, avaible phospate 0.07%, soluable potash 0.14%. peters ingredients list as nitrogen 20% ( 1,9% nitrate, 18.03%urea) phosphate 20%, potash 20%, magnesium 0.50% boron, .02, copper 0.05, iron 0.10%, molybdenum 0.0005%, zinc 0.05%.... added it half strength the day i bought it.