HELP! Help! Discoloured leaves.

[Urbansherpa]

I’ve had many leaves do this on all plants. Soilless media, using 2-part liquid fert. Distal half of leaves turning purplish-Brown and later closer to black.
I can’t find this in any google search. Anyone? Thanks.

[Gingerbeard]

Looks like you're getting purps. Purple leaves. It can happen during flowering. They'll die and fall off. You'll also get some yellowing leaves. It's normal.
My experience, and a picture I love to show...

[alltatup]

Wow, purps! I never saw that before; that's an awesome picture!

[Gingerbeard]

Thanks, atu! A very narcotic weed, that.

[Weed Pharma]

Did your temps drop recently?

[Tersky]

Purple shows up when it gets cold shocked though some strains do grow purple no mater what. This link explains it a little bit https://www.growweedeasy.com/force-purple

However it kinda looks brown a little to me almost like nute burn but different. What nutes and how much?

[alltatup]

I was just gonna post that same page!! I'm learning something new here!

[Urbansherpa]

OP - I’m using Nutrition-Bloom Plus, and following instructions. Ferting every watering, but not OVER watering (from what I can tell). It actually started happening in veg phase. Just half of the leaf, as in photos. I have four different strains, and all are showing similar discolouration. I’m assuming it is a deficiency or possibly an earlier pH imbalance, but of what nute, I don’t know. I don’t believe it is strain specific, and definitely not normal. Thanks.

edit - No temp fluctuations, either. It hasn’t dropped below about 15C (60F).