purple stems/yellow leaves??

im in the process of trying the exact same thing. Flushed 4 days ago, fed yesterday with 1/2 strenght flower, and a full dose of my high N guano tea. so far 2 of the plants look less yellow but the purp is still there, 1 shows no improvement (also the furthest into flower at 4 weeks) and 1 was purple stemmed from seedling, and is looking perfect with its purple stems no yellow at all... F'n bagseed...

 

My understanding is that you cant reverse the purpling that has been done, correcting the p deficiency will simply prevent it from happening again. I had the same problem with my outdoor grow, I fixed the deficiency but the leaves/stems effected stayed purple.

 

fellas, purpling is genetic. Any plant/cross that contains any highland afghani is going to have purple in it. Every blueberry, blue cross purple- god if its true there are 5000 hybrid strains of cannabis - my guess is that 2000 of them will display some purpling simply because afghani is used to bring down the flowering time and induce photosensitivity to sativa strains.

Its not something you can fix unless you grow a stain that doesnt contain highland afghani.

 

Well said friend. But what do you do with the other 3000 strains that do not have purple in there genetics?

Your post has merrit. But it only cover half the problem. We would be guessing that his plants are one of the 2000 you mentioned.

I have had plants with solid purple main stems. I was able to reverse the purple to solid green within a week.

To ID the purple to be strain or sick this is what I do and how I been tought to understand it. Granted I have never grew a purple strain that has solid main stems. I stand to be corrected but this is how I see it.

Most any seedling will have a purple stem up to a few inches. Then you see the purple turn to green. So if you see your seedling turn solid purple to solid green. There is a chance it will not cary the purple strait. If you see that solid green stem turn purple later on the it's a problem.

Purple strains will carry a purple hue to the stems from what I have learned. Not the purple streaks you see on on so many plants before the stem turns solid purple. A green main stem that turns purple does not just turn purple over night. You will see streaks of purple running up your main stems. After the streaks did there thing the purple expands out from there making your main steams turn solid purple over time. Take a blueberry plant. From what I see it is always purple. Never streaky purple. This will tell you a lot and it what I look for. When I see purple streaks I am always able to remove then. So to say it is just a strain is not really good info. Lots of people that have non purple plants have purple in there plant. It's a proven fact that purple can be a P problem in lots of strains like the other 3000 you posted above.

Also the OP has more than one plant all the same strain. Some have purple and some do not. This is telling my he has a problem for sure. How can it not be if they are from clone? Seeds perhaps but not likly.

Also I do not worry about the purple in the LEAF STEMS. I have 6 plants growing right now. 3 of them show purple leafs stems. I have not figured that out yet. But I seem to always have plants that have purple leaf stems every year.

Do you know if C-99,dogshit,ak-47,american dream,sour diesel,white widow have afgani in them? If so my plants show no purple. Just wondering friend?

Again this is just how I understand it.

 

I do not think 4 gallons will flush a plant. In my 25g pot I would run 30 to 40 gallon thru it. I would run 20g thru your plant if you want to flush it. Maybe overkill but this is what I do.

 

Hey 5150

Its my view that because of the limited gene pool our cannabis is comming from and the number of polyhybrids being crossed, its hard to say whats in about any strain nowadays. I would be willing to gamble that nearly every hybrid strain available has some afgah in it, but i dont know that for sure.

But to your other point about the appearance of purple due to P inadequacies. That may be very true. While some strains containing these high altitude afghans are very purple: Purple#1, Flo, blueberry - there are quite a few but others only carry the trait and its brought forward by cold temps, nute irregularities and other conditions i dont even know about. The purpling trait probably exist in a lot of strains but whether or not its seen is dependent upon enviromental conditions; Temperature, nutes, etc.

Thats what i think anyway 5150.

 

Well said friend.

 

If the plant is healthy then a good flush with mild N and high P,K will fix the problem if one exists. If there was not a problem then it will not hurt and will probably only help. I always flush as flowering begins and once during, then hit it with a mixture of kelp to take care of any deficiencies.

Also yellowing can be sulfur, Mg, Mo, Iron........... That is why I hit it with kelp, it has everything in it, EVERYTHING. It takes the guess work out.

 

So are the purple streaks in my pineapple kush stemP Def or not

 

A lot of people almost automatically write off the purpling to genetics.  I had these problems and it turned out to be the PH of the soil. Got acidic on me and then it started.