PH is much too high you should be going in at 6.3.
Do those pots have drain holes? Solid wall plastic pots don't work well as the media stays wet too long.
You need to measure your nutrient strength in EC because that will give us a measure we can make comparisons on. You also may benefit from feeding a more balanced fertilizer blend by using the other components in the system.
The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...
www.autoflower.org
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