Can someone please tell me what's wrong with these?

[jonezin]

I am hoping someone will help me get this figured out. I am using Ocean Forest soil with the Fox Farm nutes. I have not even come close to giving them to much of the nutes. I just finished a crop not too long ago and used the same setup (soil/nutes lighting etc) and didn't have this problem. But that crop I actually used more nutes. These leaves taht are doing this are only the lower older leaves. All of the new growth doesn't have anything like this on it. I started the last crop out at 1/4 strength then 1/2 then full and they loved it. But this time I decided to go lighter with the nutes. The strongest they have gotten so far is 1/3rd strength. Does it look like they're lacking something? Or do they have another problem? Right this minute I can't tell you which plant is which in these pics but I'll look when the lights come on tomorrow and tell you for sure. I have 1 White Widow in here (the smallest plant) 4 Shiva Skunk, a Blue Hash and 1 Northern Lights. I know one of the Shiva Skunk has this problem, the White Widow and the Blue Hash. Please help me figure out what is going on here. These are 6 weeks old and I am getting ready to flower them. I'm just waiting on getting some more soil to repot them (which will be tomorrow) then I plan on switching over to 12/12. I think they are 12"-13" tall or so now, the biggest ones I mean.

Thanks for the help.

 

[TEERCSIdbREEDER]

how often do u water?

 

[jonezin]

Only when they need it. I avoid overwatering like the plague. When I first transplanted them into these pots it was about once a week or so, but now that they need to be repotted it's been every 2-3 days. I've only given them nutes 2-3 times though and they were pretty weak. The White Widow had leaves like this at a couple weeks old. So I cut off the parts that looked like that. I've been waiting until they just start to wilt then water them. I think they'll start doing better once I get them into my big pots but I'd still like to know what's wrong.

 

[KolorBlind]

You are doing just fine on watering, that is definitely not the problem. To me it looks like one of 2 things, neither of which are that serious. First off I would say maybe a little heat stress, I had some mid 90s temps in my cab a little while back for 4 solid days while I was out of town, and my leaves started looking just like that. For me it was like 2 weeks from harvest so I wasnt too concerned.

The only other thing I can think of is a deficiency of some sort. I know that is pretty vague but to be completely honest, I dont think its very bad at all. It looks liek all your new growth is looking amazing, and at least 85% of your leaves are very lush & green.

I would flush them once with about 1-2 gallons of water each next watering, then water them with only water the time after that, then get back into your nute schedule. Plus the flush & water only will help reduce stress when flipping to 12/12. If the problem gets worse or starts spreading and heat is not an issue, I would start browsing through pics in the plant help sticky to pinpoint the deficiency issue.

Good luck
KB

 

[jonezin]

They have only been getting water for the past several waterings. I really don't think it's from too many nutrients. I'm about 99.999% sure that that's not the problem. If that is the problem, then these plants must not want any nutes at all. Because they haven't been given hardly anything at all. When I did give them nutes I watched for tip burn and never saw anything like that.

As far as the temps go, these plants have never seen anything over 80°. The room has A/C and the highest it has ever gotten in there is 80°. It is usually between 76° and 78°. When the lights are out it gets down to 69°-70°.

I had something similar to this happen with my last crop. But it was definitely a deficiency. I hadn't grown for a long time and I started flushing too early. I only wanted to flush for 2 weeks or so, but the plants took 75 days or so to mature so I ended up flushingh them for like 4 weeks. The Northern Lights taht I had growing didn't show many signs of needing anything, but the White Ice I had going too did. All of the big fan leaves looked similar to this. Only they had more yellow in them. But they turned yellow/brownish and dried up like these and died. The rest of the plant looked awesome, and the smoke was killer. I really hope that this is some kind of deficiency and not some disease. I keep everything really clean. I actually wasn't really all that worried about this but I can't afford to just let it go and have it ruin my plants or something stupid.

All of the new growth does look great like you said. I haven't noticed anything wrong with the new growth at all. One other thing I have noticed though and I don't know if it is related to the brown spots or not but the leaves on a couple of the plants are kind of twisting and curling kind of weird.

I just thought of something else too now that you mentioned heat, those temps I am taking are at root level. I haven't actually measured it at the canopy. But they're not that tall so I didn't really think it was a heat issue. Tomorrow I am going to check it at the canopy. I am also transplanting them into their final pots tomorrow and switching them over to 12/12. I need buds.

 

[Phillthy]

i am using ffof on this run and have one plant doing the same thing. i am running more nutes because these heavy feeders suffered last round. i only have one plant doing it though. same exact dryness in the bigger fans.

 

[jonezin]

I like your setup Phillthy, I wish mine was more like that but I don't have the room or the cash at the moment. I'm also using a SS2 hood and it seems to be pretty kick ass.

When I transplant these tomorrow I plan on giving them a decent dose of nutrients.

 

[B.C.]

They've been in those pots long enough that they getting rootbound, which can cause problems with em feeding correctly, plus the soil itself is played out as far as food goes. So with hardly any extra nutes, they're hungry. That's why the problem is only on the bottom leaves. If you were to let it go, it would work it's way up.

Listen?!? can ya hear that? they're saying we wanna stretch our legs, and goddamn-it, we're hungry! lol! I think you'll be fine when you repot.

Btw, if yer afraid of overwatering, add 30% perlite to the next soil, and also make a ton of holes in the bottom of yer pots. This way the soil acts like a big sponge, holding water and plenty of air. It makes it hard to overwater. Plus the roots and micro herd both LOVE lots of air! Good luck, BC

 

[Hazy Lady]

Whenever you get any form of necrosis on any leaves, and can't say for certain what the problem is? you can bet it is a PH problem causing a collection of locked out nutrients which is why you can't easily say Cal, Mag or whatever deficit. I notice you don't make any mention of it, do you not use any meter/strips etc?, i f you are ready to repot anyway i would run a good amount of PH'd water @5.8/6.0 and re-pot without watering in, let the roots get going for a week before watering again, then only feed when your plants show you they need something and then as you're doing - light feeds.

Edit, please excuse me, yes i did mean 6.8 to 7.0 not 5.8 to 6.0, i am sorry.

 

[Bush Dr]

^^^ He's in soil so that pH is too low, otherwise I'd agree

In the last pic the tops of all the plants look yellow ... is this the HPS light or are they actually yellow .... the bronze coloured patch I can see but can you clarify the colour

 

[stinger_489]

If your PH is ok...It looks like an iron deficiency to me...Or maybe a spot of rust rot.

 

[B.C.]

I wonder how I've grown in this soil for years without PHing anything? I don't add lime or extra compost for humates, yet I have no problems with them feeding right ( PH ). I do always make sure to transplant on time so there is enough soil to buffer them, maybe that's it? I dunno, my plants are happy though.

I think if you run the Shiva Skunk long enough yul see she's can eat, so will the Blue Hash, esp if it's dominated by the hashplant side of the mix. Food for thought.... BC

 

[jonezin]

Hey thanks for the help. I would have replied sooner but I was busy repotting these.

I have never ph'd anything. I know maybe I should but I don't have the cash for a pen/tester right now. I mainly only use distilled water (I never use tap water).

I would have transplanted these sooner but I didn't have the cash to get the soil. I finally got it Friday so I finally have them transplanted into the 6 gallon pots.

I forgot to mention that I always add 20% perlite to this FFOF when I transplant them. I also use about 1 oz. of dolomitic lime per gallon of soil mixed in. The first/last grow I had (with this setup I mean) I used about 2 oz's of lime per gallon of soil. I wasn't sure how much to use then so I just used one heaping tablespoon of it per gallon of soil. Yesterday I weighed that amount at it was just under 2 oz's. Jorge Cervantes says to use 1 oz. per gallon of soil (I think) so I cut it in half when I transplanted all of these yesterday.

This isn't the first time I've grown. I had a grow room set up in the early 90's and used 2 400 watt MH and HPS lights. Back then since there wasn't the internet I had the Marijuana Growers Guide Deluxe and the Marijuana Insiders Guide and read them both cover to cover several times before I started. I never ended up being able to get a nice harvest out of that setup though because a "friend" of mine had a big mouth... I just mentioned that though because I'm not a total newb and have a good basic understanding of all this stuff. I definitely don't overwater.

The tops of the plants aren't yellow, it's just the lighting. I didn't bother to set the white balance on the camera when I took the pictures. They're actually pretty green.

Thanks again for all of the help with this.

Hey does anyone use Oregonism XL? I posted another thread about it, but I'm trying to figure out how much of it to use for sure. The guy at the grow store has me a little confused about it. The thread I posted is here. Can someone help me out with that? I think I am supposed to use 1 1/2 cups of it in my 6 gallon pots. Is that right?

Thanks.

 

[jonezin]

Why is it that no one will comment on the OregonismXL?

 

[relief]

Looks to be a Cercospora fungus infection, also called leaf blight.

Check the underside of the leaf it should not be discolored to the extent of the top (the top should look worse than the underside).

If the coloration is really bad on both sides it's bacterial infection. Also, bacteria infections tend to have a yellow outline of the infected area, but not always. Some rare strains can cause rust with no yellowing. Either way, a good fungicide will take care of your problem.

*edit*

Forgot to add, make sure you spray both the top and underside of the leaves. Follow application schedules supplied by the manufacturer. You will be ok.

Also, fungus spores can live in a hospitable environment for years. Make sure you spray your entire grow area as well or you will continue to have this problem. Happy growing and my you have a good harvest.

*Another edit my friend*

I got to looking at the pictures and I noticed the yellow outline of the infection. This is not a deficiency.

 

[jonezin]

relief, thanks for the help. I looked that up and a lot of the pictures I have found of it look exactly like what I have going on. The picture posted though doesn't really look like my plants if you see them in person. You actually can't even see this on the underside of the leaves for the most part. On most of the leaves that this stuff is on (even the worst ones) if you look at the undersides you can't see it at all. If you look through them at bright light then you can tell that something is wrong with the top of the leaves, but that's it.

Either way, I used a fungicide on one plant (a Shiva Skunk) that is the worst one. I can't get Serenade around here so I used Organocide, since I already had some. Growco shows that Organocide on this page for "Disease - or - Insect AND Disease". So I hope it works if that's what my problem is.

 

[relief]

relief, thanks for the help. I looked that up and a lot of the pictures I have found of it look exactly like what I have going on. The picture posted though doesn't really look like my plants if you see them in person. You actually can't even see this on the underside of the leaves for the most part. On most of the leaves that this stuff is on (even the worst ones) if you look at the undersides you can't see it at all. If you look through them at bright light then you can tell that something is wrong with the top of the leaves, but that's it.

Either way, I used a fungicide on one plant (a Shiva Skunk) that is the worst one. I can't get Serenade around here so I used Organocide, since I already had some. Growco shows that Organocide on this page for "Disease - or - Insect AND Disease". So I hope it works if that's what my problem is.

Excellent, we now know that it's a Cercospora fungus infection since it's only occurring on the top of the leaf. Glad to hear the problem has been diagnosed. Good luck with your crop.

Green Cure is what I use.

http://www.greencure.net/plant_diseases.asp

GreenCure® is an organic potassium bicarbonate-based fungicide that's safe to use on any garden. Fruit and vegetables can be harvested as soon as 1 hour after spraying!


What plant diseases does GreenCure® control?

Alternaria Blight
Anthracnose
Ascochyta Blight
Black Spot
Botrytis Blight
Botrytis Grey Mold
Cercospora Leaf Blight
Corynespora Leaf Spot
Didymellina Leaf Spot
Diplodia Tip Blight
Downy Mildew
Entomosporium Leaf Spot
Fusarium
Helminthosporium Leaf Spot
Ink Spot
Molilinea Fruit & Blossom Rot
Penicillium spp.
Phomopsis Blight
Powdery Mildew
Ovulinia sp.
Ramularia Leaf Spot
Ray Blight
Rust
Scab
Septoria Leaf Spot

 

[socbutter]

Thanks relief

Having the same problem and now using Safer Garden Fungicide

Credit to you

 

[B.C.]

hmm...

hmm...

Why is it only on the older leaves, and not all over the plant? BC

 

[relief]

socbutter, you're welcome, just help someone else if you see them with the same problem.

Why is it only on the older leaves, and not all over the plant? BC

BC, older leaves are more effected because of their age. The same way older people are more likely to get diseases that younger people wont. The growth cells in the younger leaves are growing strong and fight off sickness, but as they mature they will suffer the same fate if the problem is not dealt with.

Thats why I immediately thought it was disease and not a deficiency. Fungus will usually target older leaves first, but not always.