If you've ever asked yourself this question: "Why does my weed plant have purple stems?", you have come to the right post. Is it worrying? Am I in time to fix it? What exactly does it mean? From now on you will know what Cannabis purple stems means.

Stems turning purple...Only for one reason?

Absolutely not, stems turning purple for different reasons. Stress can be a cause (nutritional deficiency, pests, ph or light problems...), but there are also cases where you don't have to worry. Let's go step by step, we are sure you will identify your case.

Let's start with the least worrying, your plants are probably perfectly fine and you don't need to know anything else.

Strains with purple stems: Auto Dark Purple

If you are worrying about a strain that is already purple and also characterized by a very dark foliage: Relax. You have in front of you a strain with purple stem. As you know, the world of marijuana is incredible, among many other things, because of the unique pigmentation of each strain.

The best possible example is the Auto Dark Purple of Delicious Seeds:

-      Auto Dark Purple

Auto Dark Purple

Yes, purple cannabis stems may be due to genetic.

Anyway, beyond the color, you know better than anyone if something is going wrong. It is possible that this is your case, but you still don't know what you have to change concretely so that your plant not only looks better but also works better. So, now let's get down to business.

What causes purple stems on cannabis plants

As we have already mentioned, stress is the word that encompasses most of the things what causes purple stems on cannabis plants. But let's get down to the specifics of your problem:

-    Fungus: Does the word Fusarium ring a bell? It is the pathology that can be giving a purple color to the stem of your weed. If your plant is large, you have many chances that you have been visited by this fungus, since it affects these specimens in a special way.

-    Ph: We have put it in second place, but the first thing you have to do if you have not yet found an explanation for this problem is to measure the pH. If it is too high or too low, it may very well be the cause of that reddish or purple tone.

-    Too cold: In this case, what may be causing your cannabis purple stems are too low temperatures. If you just turned on the bulb, try changing this which will probably change the color as well.

-    Insufficient nutrients: Many times we get complicated, and what causes purple stem weeds is a nutrient deficiency in our plant. Yes, as simple as that.

There is one last factor that we haven't talked about that also causes weed with purple stem. As you can imagine, we have not discussed it because it is not as important as the rest, and that is lighting.

It is likely that if you use lighting methods with a lot of exposure to your crop, the color of the stem will turn red or purple. Don't worry, it's okay. If your plants look good, everything is going according to plan.

As a final conclusion, we are left with this last sentence. If your grass looks good, don't be alarmed. After all, if your plant has a problem, it will only be one more symptom of the problem.