plant is turning purplish black (pic)

Help! A few of my friends outdoor plants are turning a weird color. Can anyone tell me if this is normal, or should we be worried? Thanks!

You should be worried, that does not look healthy to me. The lower/larger leafs look healthy, so whatever you guys changed is being super hard on the plant. That new growth looks bad.

is the plant growing slow?i beleive it is showing signs of a calcium def

Yes, it is growing slow. what can i do? thanks.

hey dude, i have the exact same problem, and so far, i have had no luck figuring out why my stuff does that either, i dont think its a calcium def just cause the ferts i use have calcium chloride i think it is, not sure, but thats one of the main ingredeints, so i really dont know. Were do u have it, like whats around the area, (pests, animals, light, water) are they in pots or grounded, have u had this prob before ? I have had it the past 2 years. I tried using a fungicide called blue lightning but no effects i dont think so dont just put it off as not a mold, i still beleive it could be a mold im not sure, ANyways, try talking to a garden specialist about some fungicides and its very possible well most likely a fert issue so go out and buy something like silica blast for an extra calcium boost. anyways keep us posted with ur progress,

A plant turning red is a sure sign that it too cold for it. I lost 1 of my house plants last year to the cold, it was outside and it started to turn a lovely red colour,next thing i knew its dead. It wasn't a cannabis plant tho hope that helps:pimp:

The plant is outside next to a shed. It is in the ground and it has been VERY hot here lately. I also found it on another plant that is nowhere near the others. The other plant is almost 6 ft tall and is at the very top. We'll see if it starts budding here in a few weeks...
Kevin - what happened to your plants that had the same thing? Did you let them bud?
thanks!

hey dude. I actually checked and i guess my ferts got calcium nitrate, lol, just figured id clear that up before people think im feeding my plants a preservative for keeping pickles crispy lol. But yea dude, i dont know what it is, i let my plants bud last year, i got mediocre results with the ones in the ground, they were about 6-7 feet, and it infected those ones first, i had a couple in pots which didnt get hit with the black stuff till 2 weeks into flower so they budded nice, but let me say, this will have a crippling affect on ur yeild, and lol even though this isnt a laughing matter, i dont know if its good to smoke considering it could be mold, hasnt stopped me, but as i said so ur plants are in the ground eh. How close are ur plants and which plant caught the black death first, I have read from some ppl that they top EVERY infected area and burn it so it doesnt spread. Now thats not a bad idea during veg, but since everything is starting to flower u have to decide. I topped most of mine, but it never fully went away. and now its plagueing all my plants, and thats to say that if it was a mold, i should have topped and burnt everything right away, but i didnt and got lazy and now my yeilds going to take one for the team. Unfortunately my friend, i have no fucking clue what to do. If u top it, MAKE SURE, and i mean MAKE SURE that u get EVERY infected area no matter were on the plant cause it will come back, QUICK, so if thats ur thing do it, before u do that,. feed it some calcium and phosophorus supplements from a local indoor gargen place or garden place, oh yea, if its possible what type of soil did u use, is there any animals around, and whats ur ph? hope this helps a bit. i really wish i could find a solution, cause i need it too!
peace bro
Kevin

i also googled it and the closest thing to it was "sooty mold" which creates a black powder which is not our problem

oh and a quicker, do u live north or in south america, well i mean the states obviouslyty but were abouts are u located, south or north.