No real growth or super slow growth

Week 8 super lemon haze . I’m growing a few other plants but this one seems super slow. It’s been about a week or 2 no new developments. I’m using ocean forest and coco perlite mixed. Under maxisun 4000w. Any advice . I only feed fox farm trio nutrients 1x a week. All of the other plants have responded well it’s just this one that looks droopy . I did flush her 2 days ago and fed with calmag the following day . Any help would be appreciated

A support ticket with key info would help.

Nicky as I’m new here how would I go about doing that?