How often do you water them?

They are hungry for some potassium ASAP whatever your feeding them give them more

FrostyOGgro said:

How often do you water them?

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Lately I’ve been watering every 3 days 7Gallons of water divided by 4 containers.

Also, at second glance you have mild light stress too I would turn your lights down 5 to 10%

The FF Grow is 6-4-4, which IMO is too high in Phosphorus and too low in Potassium with the Bloom even worse (and a complete joke). If you switched over to Bloom during flip, when your plants do a ton of growing, you may be starving em. And I don’t care what it says on the bag of HF it’s primarily chipped wood byproduct (and really hangs on to moisture). Luckily you have a LOT of leaves and your plants are sucking up the mobile nutrients.

If you have wood ash it’s a quick & easy Potassium feed. As Groucho suggest a K deficiency will cause the tip and edge yellowing. A cup of ash, 5 cups of water, shake, shake, shake, and then mix a cup of the solution in a gallon of water.