Do they look ok, leaf problem (form/images attached)

First, the form.

E-indoor or outdoor
E-soil, soilless, coco, aero, or hydroponic
E-specific medium - potting soil with peat moss and blacks gold
CSL-Soil type/brand
HCL-Hydro/aero/soilless system type
SCL-Anything you have added to the soil - perlite
SCLR-Soil or slab runoff pH - not sure, maybe a little low
E-Water source - tap
E-Source water pH - 6.5-6.8
HRT-Source water EC (if hydro)
E-Age of plant - roughly 4 weeks into flower
E-Type of fertilizer - Fox Farm trio
E-Rate of application (if hydro, this is your PPM number, preferably after each component is added) - once per week, other watering is tap and molasses
E-Lighting source and distance from plant
E-Air temperature (both day and night if you are running a dark period) - day 82, night 75
HD-Reservoir temperature
E-Air % Relative humidity - not sure, but at least 90% outside
E-Lighting schedule 12/12
E-Type of ventilation your room has
TR-Did you pre-soak your media in pH corrected solution?

I wanted to get opinions on whether the yellowing, spotting and canoeing is just due to flowering (I think I have roughly 4 weeks to go) or if I may be seeing plant issues that need to be addressed. They still seem to be growing ok and the buds are getting bigger, just not very quickly. The water is ph'd after I add the nutes and goes in correctly. The soil may be a bit low on ph, not entirely sure but I add higher ph water to counter act every other watering just to make sure due to the peat moss in the soil. They are in 3 gallon pots but my tallest plant is about 3 feet so I am hoping that they do not need more room to spread their legs. Will they typically be ok if they end up a little root bound during the last few weeks of flower?

Any help would be appreciated. I just don't want them to go down the wrong path so close to harvest.

Thank you all.

Bump. Still need help.

Likely it's ph swings from trying to correct a (runoff) number you're not sure about, and possible overwatering, and I'd back-off of the Big Bloom to about half of what their schedule says. (you are using the FF feeding schedule, right?) Keep your ingoing ph steady, perhaps closer to the 6.8 to 7.0 mark. But this is exactly where a ph pen is so handy. (to check runoff, which tells you a lot of what's going on in the soil) Commercial potting mixes lose their buffering capability right about, or just before harvest time.

If using their feeding schedule, did you add the Grow Big a couple of weeks into flower? Not really a big deal but if you want to, you can give one a half a dose of Grow Big next feeding day, along with her usual regime, and see her reaction. Tiz a good learning experience and isn't anything that would risk harm. Might stretch a tad, but have the ability to fill-in. Getting too late to really worry about the yellowing though. It's normal. The spots look like where moisture sat and burned. I do it all the time while being careless with splashing or dripping nutes.

The more you squeeze the roots, the more difficult it becomes for them to uptake the necessities, and the less room there is for nutrients to absorb into the medium. (less medium = less absorption...more roots = less medium) Restricted, sure...rootbound, no.

Thank you Rusty.

Yes, I have been following the FF Feeding schedule. This Monday was the week they told me to add all three (the Grow Big during flowering that you were talking about). Tomorrow they get just water and molasses. So I have one more go around with all three nutes per the schedule. I will cut the Big Bloom in half this time and see what they do.

I don't think I am under watering. They get 2 gallons of water (split between the three plants, that is when the run off starts coming out the bottom holes) every 4 days. Usually right when the sides of the pot start to break away from the soil as it constricts inward. I can still feel moisture if I go down a few inches into the soil, but top is definitely dry. I can try watering every three days for a week or so and see how they take to it.

Though I know I need the digital pen I will just finish out as you say with the water going in around 7. I will be getting the pen for my next try.

Glad to hear that they should not be root bound. I was worried that they may be getting close.

Looks like other than cutting the one nutrient in half I just wait and see, hoping they end up ok for the next few weeks and I guess bud size will come in time.