yellowing leaves on the bottom ?

my plant is almost a month old now

but now the leaves on the bottom 4 of them are turning brown/yellow and are drying up and starting to curl

but the rest of the plant is fine nice and green

what could the problem be and how can i fix it ?

thanks

Hi man, i had the same problem, it's due to lack of magnesium (MG), to fix it you need some Epson salt, pics would help alot better if you can, cheerz

thanks man sorry no pics dont gotta scanner

what exactly is epsom salt would i just throw it in the soil ?

it could just be the life cycle of the leaves. after a while old leaves fall off, cuz of lack of light n such.