Monster auto not bulking up

Hey y'all, I have a monster NYC Diesel auto in week 4 of flower that's just not stacking buds like I'd hoped. I've never had this issue with any plants before, I'm not sure if it's because it's such a big plant and expanding so much energy getting nutrients to all the bud sites or what. But if that is the issue how do I fix it? And if it's not what can I do to bulk this girl up!
5g DWC
1300ppm Rez 68° Tent apx. 74°
Trio(1,2,3), cal-mag, Heavy 16 Fire, and hydrogaurd
20/4 under Spectrum King 402

Some can go as long as 6 weeks(withoit stunting on purpose or sever training) before flowering. Just let it do it's thing.

Edit: just saw she's flowering already, my bad. You can go 24/0 and let her soak in all the light she can.