Purple stripes on stem

Do these look like a deficiency or natural ?

Could be nitrogen imbalance Or simply the type of strain u got grows purple(red)stem. Both cases happen often

Looks like it might be chlorosis to me, but it's hard to say as the leaves look to be healthy. I'd check your pH and try to get it balanced or flush if your growing in soil just to be safe. Keep an eye on it and make sure it doesn't get worse.

One plant is the purps bcbd other one is timex from ohio both in black gold soil they have never been feed once for 2 months the only food they got was in the soil and well water is used with high tds so maybe one of thoes things could be it maybe im not sure

dont worry to much about the color unless it starts turnin yellowing cuz that means its dying, more often then not it will out grow the purple viens. it could be the strain so dont stress about it at all!

that plant looks great how old is it? when r u flowerin?

Plant is over 2 months old both they were never feed all that was done is germinated then put in black gold soils and water thats it i never had feed a plant until its time to flower and seems to work flowering started tonite plants are about 2 3 foot ,I use g.h organic nutes

How are you watering? Do you get plenty of run off from the pots when you water? Or do you just give them a little bit here and there?

The reason I ask is if you're not getting plenty of run off from the pot you could be building up salts and other crap in your pot from the hard water.

They each get enough till its coming out the bottom about a gallon of water every nite for 4 plants do i need to use flowering nutes and veg nutes when flowering? i have only ever used flowering nutes alone with nothing else