Purple or black stains on leaves and stems

dankohzee · #1 (**permalink**) 07-20-2009, 12:52 AM

What's up GC. I just saw an unresolved thread on this 20 minutes ago and realized it's the same thing I have going on. I went to take pics and when I got back I couldn't find the thread. Maybe it's in another section so here goes. This is something new to me, so I hope you all can help.

This is affecting only two or three of my potted plants. They are being grown in 45 gallon smartpots with a peat based mix. All other plants are healthy, and this is the only branch that has this going on quite so severely. I don't know if you can see from these pics, but the leaf tips are also twisting a bit and are cupped upward. This particular plant has had cupped leaves quite a lot, but this purple is something new. Earlier in the season this particular plant was eaten up pretty good by leafhoppers and aphids (notorious disease bearers as you all know), and is getting eaten just a bit now, but I think it's because it's unwell. This particular plant is LSTd, but the others were not. Whatever it is seems to be getting worse, but only affects certain branches. My nutes are Biocanna and I apply per manufacturers instructions. A couple of weeks ago all plants were given a standard dose of epsom salts. I don't really know what else to put here, so here's the pics.

BTW, I'm not interested in your best guess--I can do that on my own. Only those with experience in this need respond. Not trying to be a dick, but this is serious. Thanks.

coppermike · #2 (**permalink**) 07-20-2009, 08:11 AM

Looks liek your growing some purple

DirtyViperMan · #3 (**permalink**) 07-20-2009, 08:55 AM

Couple of questions whats the temps been at night? What kind of soil do you have them in? Is more purple or black? What does the growth below the purple spots? The only thing that comes to mind is phosphorus def. But I will break out the horticulture books in the morning and look through the desiese section. Your in the south, right? Well good luck. I will hit you up when/if i find anything.
Keep'em burnin
DirtyViperMan

dankohzee · #4 (**permalink**) 07-20-2009, 10:15 AM

My first thought on this was purpling from the cool nights we've been having. Yes, it's more purp than black. But then this upward curling started and I bagan to think the two were somehow related. However, after talking to some people I'm beginning to think that they are not. The purple is standard purple--a cool weather response. In addition to that I have a slight cal mag def and may have started my bioflores a bit late. Thanks everyone and all those who PM'd--especially less.

DirtyViperMan · #5 (**permalink**) 07-20-2009, 05:39 PM

If i continues its a phosphorus def. due to the cold weather. Wet, cold soil makes it really hard to take up phosphorus. Good luck out there.
Keep'em burnin
DirtyViperMan

George W KUSH. · #6 (**permalink**) 09-10-2009, 03:35 AM

looks like someone successfully grew some purpppppp

Props to you my friend

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#1 (permalink) 07-20-2009, 12:52 AM
dankohzee It ain't easy being ohzee Join Date: Jul 2008 Location: Up on the Roof Again Posts: 1,904	Purple or black stains on leaves and stems What's up GC. I just saw an unresolved thread on this 20 minutes ago and realized it's the same thing I have going on. I went to take pics and when I got back I couldn't find the thread. Maybe it's in another section so here goes. This is something new to me, so I hope you all can help. This is affecting only two or three of my potted plants. They are being grown in 45 gallon smartpots with a peat based mix. All other plants are healthy, and this is the only branch that has this going on quite so severely. I don't know if you can see from these pics, but the leaf tips are also twisting a bit and are cupped upward. This particular plant has had cupped leaves quite a lot, but this purple is something new. Earlier in the season this particular plant was eaten up pretty good by leafhoppers and aphids (notorious disease bearers as you all know), and is getting eaten just a bit now, but I think it's because it's unwell. This particular plant is LSTd, but the others were not. Whatever it is seems to be getting worse, but only affects certain branches. My nutes are Biocanna and I apply per manufacturers instructions. A couple of weeks ago all plants were given a standard dose of epsom salts. I don't really know what else to put here, so here's the pics. BTW, I'm not interested in your best guess--I can do that on my own. Only those with experience in this need respond. Not trying to be a dick, but this is serious. Thanks. __________________ Dankohzee's '09 Organic Swamp Grow(Cantharis Style) Finishing times, Photoperiod, Latitude, and how it all works!!(by Backcountry) Building a Cold Frame with Dankohzee Dankohzee's Nube-Proof Seed Starting Mix and Guide

#2 (permalink) 07-20-2009, 08:11 AM
coppermike Master Ace Join Date: Jul 2009 Location: Where the grass is greenest Posts: 250	Re: Purple or black stains on leaves and stems Looks liek your growing some purple

#3 (permalink) 07-20-2009, 08:55 AM
DirtyViperMan Registered User Join Date: Mar 2009 Location: CALI Posts: 620	Re: Purple or black stains on leaves and stems Couple of questions whats the temps been at night? What kind of soil do you have them in? Is more purple or black? What does the growth below the purple spots? The only thing that comes to mind is phosphorus def. But I will break out the horticulture books in the morning and look through the desiese section. Your in the south, right? Well good luck. I will hit you up when/if i find anything. Keep'em burnin DirtyViperMan __________________ Nothing Exceeds like excess. Karma's a bitch spread it when they deserve it.

#4 (permalink) 07-20-2009, 10:15 AM
dankohzee It ain't easy being ohzee Join Date: Jul 2008 Location: Up on the Roof Again Posts: 1,904	Re: Purple or black stains on leaves and stems My first thought on this was purpling from the cool nights we've been having. Yes, it's more purp than black. But then this upward curling started and I bagan to think the two were somehow related. However, after talking to some people I'm beginning to think that they are not. The purple is standard purple--a cool weather response. In addition to that I have a slight cal mag def and may have started my bioflores a bit late. Thanks everyone and all those who PM'd--especially less. __________________ Dankohzee's '09 Organic Swamp Grow(Cantharis Style) Finishing times, Photoperiod, Latitude, and how it all works!!(by Backcountry) Building a Cold Frame with Dankohzee Dankohzee's Nube-Proof Seed Starting Mix and Guide

#5 (permalink) 07-20-2009, 05:39 PM
DirtyViperMan Registered User Join Date: Mar 2009 Location: CALI Posts: 620	Re: Purple or black stains on leaves and stems If i continues its a phosphorus def. due to the cold weather. Wet, cold soil makes it really hard to take up phosphorus. Good luck out there. Keep'em burnin DirtyViperMan __________________ Nothing Exceeds like excess. Karma's a bitch spread it when they deserve it.

#6 (permalink) 09-10-2009, 03:35 AM
George W KUSH. Banned Join Date: Aug 2009 Location: Philadelphia, PA Posts: 81	Re: Purple or black stains on leaves and stems looks like someone successfully grew some purpppppp Props to you my friend

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