Ok...are you ready...I have q's and statements.

1st fill up pot...roots must be 'bound' with that lush of a plant in that little bit of soil...you need 3 gallon pot filled up.

It is a mag deficiency...advice up top should work. If you use RO then add calmag+.

what nutes did you use before.

how old is plant

what kind of water and soil are you using

do you have ph tester.

lowe's and various hopot places do not carry appropriate nutrients for MMJ.

Look in your town or ebay for a hydro store and get some gh 3-part...cannot go wrong...great stuff for beginners.

bghydro...sunset hydro...online.