stalk is getting purplish towards the top and fan leave stems ?????

top of my stalk and the fan leave stems turning purple on my cali skunk outdoors

Magnesium deficiency. Get some epsom salt and mix 1 tablespoon per gallon for watering.

that's what I was thinking cause I was using cal mag and it just started flowering I shoulda already hit it with it I don't know why I didnt

Your plants look fine very healthy. Purple stalks and stems can be perfectly normal or a sign but they look just fine. Can be genetics, cooler temps can do it.

Genetics doesn't start purpling during flower. It's the lack of magnesium that causes that. I have a plant that is doing the same thing. I foliage feed it Epsom salt for a few days and all new growth did now purple. As I stopped, new growth purpled. I don't have pics of it but you can view my grow journal in my signature. Best to start giving it some magnesium. but I don't think you REALLY HAVE TO unless it's REALLY looking fucked up and purple.

BSD0621 said:

Genetics doesn't start purpling during flower.

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Genetics can be the cause of purple stems.. Phosphorus and Magnesium def can cause purple stems... it can also just be a genetic thing.

mixing in dolimitic lime is a popular method for supplying mag in the MJ world.

It looks like Phosphorus deficiency, are nights starting to get cool?

Those look fine. I wouldnt worry about deficiencies unless youre seeing signs of it in the leaves, and those leaves look lush and healthy

yeh it got about 45-50 degrees at night last week for 3-4 days

chris36 said:

yeh it got about 45-50 degrees at night last week for 3-4 days

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^Most likely the cause. Your leaves do look good though, so P is probably present in the soil but interrupted uptake due to those temps. Once you go below 55°ish this can happen

I agree, watch the leaves. It looks good to me. And yes purple leave would be phosphorus.

Damn that's cold!