purple leaves

Morning fellow growers, hope the day finds u all well! Watered my plants last night before bed and noticed purple veins on the leaves. Mostly just the one leaf, however there seems to be a slight purple tinge developing on others. Was curious what causes this? Is this some type of deficiency or...

I'm half way through my flowering stage, and I'm just starting to notice a purpling pattern in between the veins of the leaves. The leaves don't look particularly unhealthy otherwise. Any suggestions at to whether or not this is a problem and if so what to do about it? Thanks!

63 days, and I’m getting a whole bunch of reddish-purpling towards the top. I haven’t fed much this grow; my journal shows my last feed was 2 weeks ago today, and I overdid it a bit and started getting nitrogen toxicity. Viparspectra 300 16x16x48 tent Critical Autoflower - Nirvana Fox Farm...

Hi everybody, I am growing for the first time just by chance as I found a seed once and I decided to plant it in late May (uk) , with no specific fertiliser or any nutrients and I have to say, I didn't expect the result I got! A couple of weeks ago leaves started turning purple but I didn't take...