Purpled leaf veins nutrient deficiency?

I’ll let the pictures speak.

Not having any details about your grow, I’d say you have a magnesium deficiency. The yellowing and purple stems are symptoms magnesium deficiency.


It’s a brucbanner by ilgm. Promix hp with genral hydroponics maxibloom. I was thinking the same thing and gave her a double dose yesterday. Her sister is not displaying these symptoms and they are fed identically maybe just a different phenotype. @Bulldognuts

Double dose of calimagic * I had been backing off using 2.5ml per gallon in flower and switching to 2.5 per 2 gallons.

Could this also be nitrogen deficiency or is it more likely magnesium?

Sorry about not getting back sooner. I’m going to tag a more experienced grower that grows in Promix. @Myfriendis410 may be able to help you nail down more specifically what your issue is.

@Becreativeman 2.5 ml/g is half dose of calimagic, full dose is 5ml/g

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COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so; Or post
NA (non applicable)

  • What strain, Seed bank, or bag seed
  • Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
  • Vessels: Pots, Grow beds, Buckets, Troths
  • PH of Water, Solution, runoff (if Applicable)
  • PPM/TDS or EC of nutrient solution if applicable
  • Indoor or Outdoor
  • Light system
  • Temps; Day, Night
  • Humidity; Day, Night
  • Ventilation system; Yes, No, Size
  • AC, Humidifier, De-humidifier,
  • Co2; Yes, No

Always try to upload a clear picture of any issues you may have to allow the community to assist you.

Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us help you in a more efficient manner :slight_smile:


Age of plant (how long in flower) would be good data too. In particular lets see runoff TDS and PH.

Late in flower the plant is going to consume and drop older fans which is what that one kinda looks like.

  • bruce banner by ilgm
  • Method: promix hp water to runoff
  • Vessels: 5 gallon air pots
  • PH 5.8-6.2
  • was under 1000ppm going in and I was lazy a few nights and straight watered
  • Indoor
  • 600 watt hps
  • Temps; 80, 70
  • Humidity; 40, 55
  • Ventilation system; 6 in fan, 2 6 in oscillating fans
  • De-humidifier,
  • Co2; in boiler room 5x5 tent

My banner had purple stems too

Yeah her sister has purple stems and looks perfectly healthy. I’ll get days in flower and ppm out tonight when I water. Also check my calmag chart @Dave101 @Tinman @Myfriendis410 @Bulldognuts

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I’ll take some pictures of the healthy one to compare

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Okay so according to the back of the calmag bottle it says 5ml per gallon but the chart I use from general hydroponics says to use 2.5ml. For a while I was just giving them 1 ml per gallon in flower because the guy at the hydro store told me half way thru they really dont need it anymore. The ppm are around 1000 when I water. When I poured the 1st gallon thru it came out 800ppm. When I checked after the 2nd gallon thru it was 3000ppm. Ph at 5.8 in week 7 of flower. @Dave101 @Tinman @Myfriendis410 @Bulldognuts

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Pictures from tonight

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@Myfriendis410 @Bulldognuts @Dave101 @Tinman. Anyone have any ideas?

Plant looks like it’s consuming itself in mid flower. Without data on the grow I can’t really speculate.

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@Myfriendis410 I put everything up above

Maybe I’ll just run a few gallons of straight water thru it tomorrow and continue feeding the following watering with some additional calmag