Did it just sprout? If so I have seen this before at the bottom of the stem when it is the First 5 days of Vegging.
What???????.I'm an outdoor grower and my stems turn purple due to the drop in temp overnight, what are you conditions around the plants?
yea man, it's only the stems of the fan leaves that are really purple on my plants, i have purple pre flowers also which should be interesting when they start to flower, they are bagseed so we'll see how they turn outWhat???????.
That is not normal, When you say burn them was it a Nute burn or from the lights?.