Cerebro

You should give them a feed.
Sounds like two of them are suffering somewhat.
One month into flowering is still pretty early outdoors, you're still going through veg as well. I'd put some diluted seaweed concentrate in as a feed.
You should try to make the best of what you've got.
I'd also be getting some sulphate of potash, that's your best source of K for soluble outdoors.
But yeah, a bit of a feed may provide some N for growth, may help get rid of some nute lock too, then some flower ferts next feed, in a week or so, then back to veg feed, then flower feed. etc.

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