Few leaves folding

[Slipon]

don't you have trays under them ?

and IMO you don't need to do a full flush, not like you have a major problem, just a few leaves curling up, right ?

just try to give em a good watering with clean 6,5PH water with nothing added, and make sure to see some run off

even if it don't correct the problem it cant hurt and Im still not 110% of the curse, would have believed you had a low PH but that was`t the case, so Im more convinced that its salt/nuts build up, specially nitrogen this late in to flowering, if you have really dark green leaves and also see some "clawing" leaves thats a sure sign

a good watering with clean 6,5PH water will no matter what help the PH a bit, if needed and delude any salt/nutrients build up

 

[JMD]

then you should be ok

how is the leave`s looking to day ?

Im more thinking salt build up/too much nutrients in the medium then ? did you ever give em a good flush with clean water ?

Never mind my earlier post, I just did a recheck and this is what I saw:



Looks like zinc deficiency - right?

EDIT: By closer inspection it could also be magnesium deficiency.

 

[Slipon]

well now you say so, Mg could very well also make your leaves curl a bit

as I think I mention early a bag of Epsom salt from the local wellness shop (helsebutik) works perfectly fine (I have a 1Kg bag at my sink as my strain is a Mg lover)

you can of course also buy a bottle of Ca/Mg+ now your moving in to hydro, but the epsom salt works perfectly fine and cost less even tho the wellness shop do charges a bit much for Epsom salt IMO (100kr for a kilo)

beside NPK the most important if you can say so is actually calcium and magnesium, I think we get plenty of calcium in out tap water, so its more the magnesium we need to add, Epsom salt or English salt as its also called as its all started in surrey (England) where they mine the salt is pure magnesium sulfate

 

[Slipon]

dunno if this is of any use to you or if you already have/know it ?


View attachment 2756096

 

[JMD]

well now you say so, Mg could very well also make your leaves curl a bit

as I think I mention early a bag of Epsom salt from the local wellness shop (helsebutik) works perfectly fine (I have a 1Kg bag at my sink as my strain is a Mg lover)

you can of course also buy a bottle of Ca/Mg+ now your moving in to hydro, but the epsom salt works perfectly fine and cost less even tho the wellness shop do charges a bit much for Epsom salt IMO (100kr for a kilo)

beside NPK the most important if you can say so is actually calcium and magnesium, I think we get plenty of calcium in out tap water, so its more the magnesium we need to add, Epsom salt or English salt as its also called as its all started in surrey (England) where they mine the salt is pure magnesium sulfate

I'll go to a wellness shop tomorrow Matas have it I think. Would be awesome if I didn't have to flush the soil.

dunno if this is of any use to you or if you already have/know it ?


View attachment 2756096

Haven't seen that poster before - it seems really good! Thanks.

By looking at that one, I still think it's magnesium and zinc deficiency that's the cause. I'm starting to have some dying tips on one of the plants, which seems to fit the zinc deficiency well.

 

[Slipon]

I ask in Matas before and no sorry don't have it, its not the shop it use to be, its a woman shop with beauty products, not much "general" store over it anymore, I remember when I was a kid and they got all kind of fun stuff from cork to use in vine bottles to mineral products you only find in wellness shops or the drug store (tho drug store don't have the Epsom salt either

btw
I also got some black strap molasses in my wellness shop tho that one they had to order home for me (3 days)

here is what I normal use to keep my girls healthy beside a good soil mix to start with

 

[Slipon]

my best advice, base on the pictures and info provided, and thinking at your 5+ weeks in to flowering

is to give em a good watering (small flush if you like) with just clean water with a te spoon of epsom salt per 4L of water and PH`d to 6,5

give it a day and see how it react to it


did you had any issues with curling leaves or cupping leaves before ? maybe just after a watering ? or do your leaves stay nice and flat, pointing slightly upwards after a watering ?

 

[Sir.Ganga]

Suddenly a few of the largest fan leaves have folded. Any ideas for what the reason could be? They are 5 weeks into flowering today.
Quite a few leaves seem a bit.. droopy. Related maybe?

5 weeks in and they are starting to get tired of supporting those huge leaves, that's why the droop, as for the canoeing that could be any number of indoor factors usually from heat or circulation issues. Seeing the tip burn tells me you have them at their max for ppm, maybe drop the ppm by a 100 or so. If your hydro a good flush and a little pruning to allow better air flow, for soil a little pruning and begin dropping your ppm now. You see now why pruning is an important step. Those big leave are being abandoned long before you see that droop, being able to spot it in time and removing them will result in better flower production because the additional energy gained in the plant automatically transfers upwards. I would not worry this far in but removing the bigger leaves will not hurt one bit. Good Luck

 

[JMD]

my best advice, base on the pictures and info provided, and thinking at your 5+ weeks in to flowering

is to give em a good watering (small flush if you like) with just clean water with a te spoon of epsom salt per 4L of water and PH`d to 6,5

give it a day and see how it react to it

did you had any issues with curling leaves or cupping leaves before ? maybe just after a watering ? or do your leaves stay nice and flat, pointing slightly upwards after a watering ?

I will definitely try that. I haven't had any issues at all so far - haven't done anything else than watering them every few days when the soil became dry. The leaves have been nice and flat all the time - looking really healthy.

5 weeks in and they are starting to get tired of supporting those huge leaves, that's why the droop, as for the canoeing that could be any number of indoor factors usually from heat or circulation issues. Seeing the tip burn tells me you have them at their max for ppm, maybe drop the ppm by a 100 or so. If your hydro a good flush and a little pruning to allow better air flow, for soil a little pruning and begin dropping your ppm now. You see now why pruning is an important step. Those big leave are being abandoned long before you see that droop, being able to spot it in time and removing them will result in better flower production because the additional energy gained in the plant automatically transfers upwards. I would not worry this far in but removing the bigger leaves will not hurt one bit. Good Luck

Any tips/guide on the pruning?

 

[JMD]

The picture below shows one of the leaves that I pulled off today, with no effort at all. I'm having a few more dead tips on large fan leaves (1-1½cm from the tip, is dead).

 

[Slipon]

them leaves you can pull off with no effort, do they get any light at all ?

 

[JMD]

them leaves you can pull off with no effort, do they get any light at all ?

Not much - so I don't worry too much about them, other when they look somewhat sick, as the one in the previous post.
I just watered them with tap water that I brought down to pH 6.7, without any nutrients in it at all. When I measured the tap water today, it read 8.6!

What worries me is that they start to droop more and more. A few of the larger branches are close to looking down, instead of up.

 

[Slipon]

can you post up a picture of the hole plant ?

 

[JMD]

can you post up a picture of the hole plant ?

Sorry for the poor quality - that mylar is damn reflective.
As you see, they aren't really compact, they are thin (due to lack of fan) and a quite a bit droopy. More space would be nice, bigger pots would be nice etc. - it's the best of far from ideal situation I just home to bring it all the way to harvest, with a decent result.

 

[Slipon]

so you say you have no ventilation at all ?

you really need to look in to some kind of ventilation, also so you have the option to fit a active carbon filter once the smell is getting to much

as you use LEDs you don't need a big system that can exchanges the air every Etc. 1-3 minutes, every 5-7 is more then enough (Im sure your good at math ) so find out how many M/3 your room is and find out how big a ventilation need to be and how much air it need to move to replace it every 5 minutes etc

a small 100mm or 125mm (got em in Haraldnyborg men faktisk ikke billigt, prøv online) would probably be fine, depending on your room size sumthing like this



I run a 150mm as I have it from when I grew with a 600W HPS and my room is about 1x3M with normal sealing hight so I guess my room is like 9M/3 and my ventilation is rated at 340 cmf I believe (there are a pages some where if you google it that have a calculator where you put in your numbers aso)

filter last roughly a year of running so I only add it once I flower (witch now is always ) also a high RH is not good for the carbon but not for your flowering plants either so as long as you keep the humidity around 30-50% it should last a year of running before you need to replace it/the carbon

ventilation is not just for heat control and to keep the humidity down in a small room full of plant but also to replace the air for the plants, and MOST important the Co2 thats in the air, normal outdoor air have around 200-400 ppm but plants can take up to 1500 ppm, why some add a Co2 system, but only really works if every thing els is optimal and you keep your temperatures above 30C or the plants can't take up that much Co2

and they need it as well as light and water/nutrients to make the photosynthesis with out enough Co2 you can add all the light and do every thing right but the plants wont be able to use it to its full potential and the "Lack" of Co2 will decide your final result/yield

a small set like that online with a little research/googling can easily be found for less then 1000 kr maybe half if you do your home work and get it on e-bay or sum thing and buy a low budget chinese one

do make some noise, but nothing a DIY box with some insulation can't fix, the Canal ventilation I posted a picture of have two speed`s and don't make much noise on low, speed control is also a option on some for extra cost of course, but maybe you can make one yourself, Im sure

trick with the filter is to keep just a bit of under/negative pressure in there so you know all air going out is trough your filter and not any cracks/holes, normally a passive intake hole 2-3x the size of the ventilation is more then enough in a small room (no intake ventilation, physics take care of it, after all we are still on earth, and air going out have to be replaced with sumthing)

 

[Slipon]

p.s.

do you have some nice drain hole`s in the bottom of them buckets ?

 

[JMD]

p.s.

do you have some nice drain hole`s in the bottom of them buckets ?

As for the ventilation: Sorry, I didn't explain myself properly. What I meant was that I don't have a fan to keep the plants moving, to make them more sturdy. I do have a fan to extract hot air from the room with! Else it would be way too hot, and the plants wouldn't get any CO2


I currently don't have any drainholes, due to the place the plants were growing before I moved them to the bigger cabinet. I'm a bit hesitant to move the plants in their current state, else I would definitely have made some drain holes.

 

[Slipon]

pretty easy to over water when you don't have drain holes in em, will have a hard time breathing or get oxygen to its roots, I do think we found the reason for your problem

http://gardenofeaden.blogspot.dk/2009/03/what-is-overwatering-and-how-to.html

if that was me in your place, there is no doubt in my mine, that I would be on my knees in there with a accudrill making +20 holes in each bucket maybe 6-10 mm and I would also look in to H2O2 for "life saving/firs aid" for my plants

http://joemacho.hubpages.com/hub/Hydrogen-Peroxide-for-Plants

Edit: normaly, when you water your Pot plant`s, you water good until you see run off, not just do this mean all of your root zone is moist, it also ensure that all the water running through is dragging fresh oxygen to the root zone

 

[Slipon]

Ooh yea and a small fan is cheap, come on, silvan have some small once for 129,95

 

[JMD]

Ooh yea and a small fan is cheap, come on, silvan have some small once for 129,95

There's no doubt, I will add a fan to kept the plants moving in my next grow. I have plenty fans, but the current grow had a lot of start-up issues where I had to suddenly move the plants.

Like I said - I just want to bring this one home, so I can get started on the next one properly (and of course learn something from this one)