OVER/UNDER watering??!!!!

It's only a day or so between these pictures.....moisture meter read 2 and it had been around a week or so since i watered them, so i got bored and watered the back two plants.....the one on the left is turning pale again......am i drowning her??? should i wait until the meter reads a low 1 before watering???......even if that takes two weeks??? I have them in 5 gal. buckets....i need to start flowering this weekend, but want them to be healthy when i begin.......(Using Foxfarm ocean potting soil and hydroton balls on top to promote surface roots).......

The leafs look a bit droopy but not to worry, u should worry about the little one in the tupperware box, seems that she´s lacking some nitrogen....

Not sure what your using for nutes. I see some deficiency more than likely nitrogen. As your plants develop they do require higher amounts of nutes, but more so when flowering. Over all Ph from what I can tell from the pics seem to be right on.

Also not sure as to when you took the pics. Plants do seem droopy, but it is normal for plants to droop 3-6 hours before the end of the plants day. Do you spray your plants? Sometimes this may help, but should be done a couple of hours before the lights go out so as to avoid molds of any kind.

Over all your plants are looking great.

Those pictures were the 11th and 12th (yellow day after watering). They were transplanted to those buckets about 2 weeks ago. They had initial problems the first week, then got healthy and started growing like crazy. Thats when i started tying down the tops, and ended up watering two of the three big ones, then realized i should have waited......didn't use any fertilizer, although the watering before i used Shultz's 10-15-10 on one of them(yellowist)and it helped it get better after transplanting.....flushed another, and did nothing with the third.....the third one seemed to take off after that, and the others regained their lost color......now that i was stupid and watered them early, i guess that puts me back another week or so till i really see improvement with those............went and picked up some Foxfarm big bloom fertilizer along with the Tiger bloom supplement.....another question i have is when to use them, and how much of it to use on Strawberry Cough (3 big ones/mostly Sativa) and OG x Master Kush (3 clones)......Any and all advice is ALWAYS appreciated.............

Unfortunately I don't use those types of nutes. With the method and nutes I use I never ever have problems. Maybe an occasional fruit fly, but really that's about it.

I quit using soil years ago do to all the problems it creates. Who wants to spend most of their time diagnosing soil problems. I don't! I also gave up on bubble machines (can be really great if proper attention is given) and just about entirely quit using my hydro machines (very great when proper attention and time is given).

I have spent years growing and trying different methods, thus the reason I grow the way I do now. But I like to see others using those methods because it helps teach them about the world of problems when growing cannabis and it makes them a better gardener! Now days I grow mostly for potency and not so much for quantity (my method of SOG) as well as I love to experiment with crossbreeding. Still like to see those big fat buds, they always bring a smile to my face!

As for your bloom mixes, I would start using as soon as you set your plants to flower. Most recipes I have seen or used starts off light and works up to a stronger solution as the flowers mature because the plants require more and more nutes. Not sure what your nutes schedule is on the packaging, but that's a great place to start.