Some plants are a bit droopy and have some yellow ...

hey friend your plants are weak, have you done a transplant ?, Yes you have done, have stressed, check the humidity is not very low, 27 degrees to 25 degrees, water every 2 or 3 days is perfect, only you must place the right amount, for the size of your small ones I would put about 700 ml every 2 days, since when in flowering consume more nutrients and water, mix the irrigation water with the nutrients and give it about 2 times per week nutrients, check the Ph, it may be very acidic and do not allow the nutrients to be well absorbed by the roots. Send me a message with your crop information, the products you use, your current humidity, the amount of water you water, etc.

I guess the droopy leaves are from overwatering because you don't water a plant every 2-3 days but everytime she needs it : let the soil get a bit dry before watering again. And the pale colour is caused by under feeding so it could be because of the overwatering that is making a part of your roots suffocate so they can't absorb nutrients correctly // Or the constant watering did wash the soil nutrients away // Or your soil was enrich for 3 weeks ( generally it's between 3 and 4 weeks ) so you've missed 2 weeks of feeding . From what I can see they will not stretch a lot more as they are already flowering.