2nd grow month in 400 watt what u guys think

ok so heres my 4 Blue Diesel grown from seed in 00.8-0.12-00.8 soil the 3 days into flower here 36 days old total.
Theyve been topped an al grew 2 main colas ive also FIMmed all the stems and the to colas.
Had a few days of heat stress an my new space may not be as warm as it should be but itll work.
The lower leaves are yellow/browning and the whole plant is a lighter green im thinkin low nitrogen an from what ive read maybe magnesium as theres some yellowing on some of the leaf veins

Any thoughts

Looking good man, nice healthy looking indica dom.

thanks man u ever hear of anyone using a mh for the 1st week or 2 of flower to keep plants short an bushy local grower suggested i try it but i havent seen anything about it

Useing MH for the whole vegging prosess is highly recomended. MH is probably the most popular method of vegging that growers use..but yes u can use MH for flowering to make ur plant a lil more lush but I think the difference would be so suttel that I don't think u would be able to tell much of a difference

i have a 400watt hps too but i might give a week or to of flower with the mh just to see

that yellowing on the higher leaves looks like it could be a little light bleaching, i had the same with my 400 with indica dom plants. i first thought it was an mg def too, so i gave them epsom salts and nitrogen and they got worse until i moved the light. how close is your light?

its 10 to 12 inchs it was closer at 1 time tho more like 8 inch