Stalk turned purple. Newbie grower wondering where I went wrong. Any advice greatly appreciated!
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I vote not worry. That happens quite often on some strains. It is the plants sunscreen. How is the plant doing otherwise?
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There are tons of reasons a plant might turn purple. Temp, P deficiency, stress, or it could just be genetic and nothing to worry about. She does look a little on the rough side. How long has she been in flower? What are you using for nutes and how often?
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Normal…
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Agree she is a little rough…before we can give much advice we need to know a little more about your grow. Please copy and paste the below list into a reply and answer what you can. Looks like alot, but no worries if you do not know, do the best you can. Lots of good growers here that can help diagnose with the right info.
A support ticket will help us help you. Can you please fill out a support ticket? Please include what type of water you are using (RO, distilled, tap.)
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
Soil brand and type
• Vessels: Pots, Grow beds, Buckets, Troths
• Runoff pH
• Runoff PPM/TDS or EC
• Indoor or Outdoor
• Light system and wattage
• Temps; Day, Night
• Humidity; Day, Night
• Ventilation system; Yes, No, Size
• AC, Humidifier, De-humidifier,
• Co2; Yes, No
If growing Hydro some additional questions:
-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution
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Zoom in on them, definitely not normal!
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Shes week 11 in ground autoflower. Week 7.5 of flowering. Stopped nutes early this week.(flushing) which I will never do again
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I have to agree with a second look.
Some strains will be more prone to it, but colder temps are the other main cause of purple stems.
Mag or phosphorous deficiencies can impact as well, but the plant looks overfed.
The pic of the whole plant tells me there are other issues going on. WHat soil are you using, what do you feed the plant, and what are your runoff pH an PPM numbers if you know them?
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lol I bet that’s grow myth #1 that you need to flush at the end. The only time flushing is needed is if the plant is overfed(possible…likely even). It’s probably a little late to really see things turn around on that plant(she will still smoke though), but we can definitely try to troubleshoot and improve the next one. Like everyone has already pointed out, the extra info from the support ticket @Riskguy provided will help us do that. If your not sure about something just ask and we can explain further.
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A buddy took some of mine back home to Wisconsin and his guys up there were bragging on the taste and they said this guy knows what he’s doing with flushing, awesome flavor and no aftertaste! I was laughing and told him to tell them I flushed them all right , with MC1 right up till chop! 
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