Do I need bigger pots?

[Fuzzylines]

Hi all, sorry to return again with another conundrum for you all but I need a little bit of advice.

I'm looking after 3NL and 1 B Haze auto that have been in flower roughly 2-3 weeks.

Everything has been going fairly well up until today. 2 of my NL plants are beginning to droop a little. Im feeding in around 3L every other day at the moment, theyre thirsty, nutes every other feed and ppm and ph in roughly 1200 and 6.2-6.5 (depends on plant and previous run off readings). Any advice on these would be great. Im using plant magic bloom nutes and adding a little PK and calmag if i see the need. All in soil

Thanks!

 

[Fuzzylines]

just to add, pots are all fed currently. I dont let the soil completely dry out but a toddler could pick these bad boys up before they're fed again