Just wanted to ask in response to your question how often are you watering? Coco for Cannabis recommends 3-5 fertigations per day (easiest done by automatic watering systems) I was watering 3 times daily by hand and usually before third watering it had dropped. Humidity became a real issue in my environment and a few of my biggest buds got mold and had to be seriously hacked back. So I’d advise keeping an eye on humidity if you do increase the frequency.
Edit: this was a great resource for learning to grow in coco: https://www.cocoforcannabis.com/
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