This just dawned on me tonight while I was watering. I've used RO since I started growing, but recently switched to tap water. My RO water never got too cold because of how long it took to fill up my res, so it's an issue that I've never even considered.
Yes. Cold temps make P harder for the plants to uptake.
Yeah, my habit is to fill my water jugs right after I've just finished watering...that way they can sit and come up to temperature. I've used right out of the tap, but we're on a well and even during the summer, our water is pretty damn cold.
I’m thinking my blueberry auto in coco has taken a complete shit lol. I fed it. But dry or wet this thing is drooping. Like wtf man.
How close is your light to that plant? Also that doesn't look fed. There are dry spots all over.
IMO Looks like lack of food via lack of water. People usually underwater in fears of overwatering.
Definitely has some feeding issues. Though I'll say this, if your plant has been abused (unintentionally) from the start or has had a few good traumas, it may always be droopy. I did that on my first grow to one of my plants and while it was a good healthy green and was being watered/fed correctly it never ever had perky leaves after that. Also if a plant is 'weak' due to mistreatment, it may not take up the nutrients it needs like other plants, and may not be able to handle regular concentrations without burning.
Why the holes?
Just for the reason you pointed out. Help redirect the feed to dry pockets.
I threw my calmag away!!! Just bought another 10lbs of living soil for autos and I'm buying another 10lbs of living soil for photos and that will be the end of nutes for me, I'll just make teas.