Northern Lights Auto

Week 1 of flowering begins with the nutrient deficiency still going on although not progressing too much, supplemented extra calmag and growth nutrition which made the issue slightly better but i couldn't put my finger on what the issue is. The plant's growth is in spurts from what i've observed, grows noticeably for a couple of days, freezes for a couple, rinse and repeat. 600PPFD 39.5 mol/m² DLI