Any Ideas??

[Guvnor]

This is ak47 at 20days 12/12, the leaf margins are turned up but apart from this the plant looks fine-which leads me to think its an envirormental issue.

Ambient Temps @ 85 - slightly high i know, but intake temps are 80 atm, making temps abit tricky to keep down
Humidity was at 50-60 for the first couple of weeks then lowered to around 30-40, both temps and humidity don't flucuate much.

At first I thought maybe I got abit excited trying to dial in her nutrient needs-so I bumped the e.c down without much change


AnY Idea's farmers?? :huh:
Cheers for the help
Guv'nor
Edit- A close-up of her at day 20

 

[Growdoc]

this is slight over ferting and will go away with some pure fresh water...

Growdoc

 

[Guvnor]

GrowDoc

Thanks for the advice-did exactly that a little while before your post, so we'll see how she goes.

Cheers again Doc
Guv'nor

 

[Guvnor]

Hey Farmers

The plant above was given plain water for a few days to see if she improved-with nout success.
With the U.K getting some blinding weather of late- temps have been 80+, i got a new 150mm exhaust fan which tries to pull my hair out when I enter my garden, but with intake temps at 80+ In not really achieving alot without an A/c.

The other plants in the garden are as happy as larry, could this particular pheno of ak47 (i have 3 ak's in my garden, all from seed) i have, just been more sensitive to heat/temps more so than the others. Obviously, different phenos will require different fert regimes- does the same apply with enviroment?-Just some like it different.

Any ideas IC'ers?? If temps are to cause, short of buying an a/c or snow falling in late august, theres not an awful lot I can do about it

Guv'nor

 

[Verite]

The big fans look pretty healthy as well as the new shoots. If there was enough overfert I would expect a little browning burn on the ends of the leaftips which I dont see. They look pretty healthy to me. If you have any other leaves showing other symptoms try and snap a pic of those. Otherwise looks good.

 

[Guest]

Guvnor, if I may, your plants look luscious! That curling is probably due to heat stress. They look healthy as can be, so I'd exclude the other possibilites for curling leaves. You might want to consider cutting a passive intake into the side of your grow, in addition to what you already have, and/or try backing the light off a bit, I know every single lumen counts from here on in, try to find a good compromise between the necessity of light for your buds and easing up on the heat. If you get more air circulating in the grow you might not need to back the lights off. For a more permanent solution you might want to consider upgrading your blower to something more potent for the future :smile:

 

[Growdoc]

i took a second look and i still say the same thing, use only pure water for the next week to 10 days.

I stand by what i say...

Growdoc

 

[Guest]

hey brother

hey brother

Magnesium (Mg)
Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.
Magnesium (Mg) deficiency:
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients hey my brother .. this will help ya .. giver er some mg . and watch her get back inline

 

[Guvnor]

Verite
The plants is completely unscaved apart from the above problem- It had gotten worse in the last few days. I try to make a point of not going over the top with my ferts, since I know that they dont need alot to grow-I think some people thinking nutes are some kind of steroid, more they add bigger their plant will be-not the case at all.
So i was abit unsure if I had gotten too excited with her feeds. since no visable defieciency had occured, apart from the aligator leaves.

Indigo-
She looks alright doesnt she, she done all the hard work-i just feed her and give her some of guv's love.
I have four 4inch intake holes in this garden, so I'm quite sure there is enough flow coming in, its just the temperature of the air its bringing in, 80-85.
When I installed the larger exhaust, everything is the garden was turned off- still temps were a little over 80
Aircooled lights Btw and the new fan is around 400-500 cfm, thats roughly since mines rated in m3/hr. if needs must I'll have to either get an a/c or install an active intake also, to combat these temps.

Hey again doc
Just before your first post, buckets were dumped and fresh water put in, after a week I didnt see any signs of improvement, which led me to think something else was the corse- Think I was just impatient?

SunSim
Thanks for stopping by The leafs are cirtainly praying for something, I'll give them some epsom salts foliar (like always - like you mentioned as to not lock out anything else) and see how she replies. My water is around 250ppm which would account for the lockout and awful tasting coffee I have to drink. I give her a spray and we'll see.
I'll try to take some pictures in a few days to note her progress.
Thanks SunSim

Thank you Verite, indigo,growdoc and sunsim for taking the time to help a noob- really is appreciated. This place really is 'The dog's bollcoks' so many top people here.

All the best Farmers and enjoy your weekends.




Guv'nor

 

[Guest]

cool can't wait to see ... i belive this will help ya .. let me know !

 

[Guest]

You're very welcome Guvnor, overall she's quite the beauty for sure. Even though I have an aircooled hood and a 360cfm blower, I like many others without a/c just plain give up growing in the summer.

I didn't mention the magnesium myself because the plant looks so obviously nicely green, but Sunsimulator is quite right about a mag deficiency causing the leaves edges to curl. Usually with mag defs you also get a progressive massive paling of the leaves which I don't see on your plant.

In any case, good luck with her, she'll be fine I'm sure. :smile: Nice weekend to you too!

 

[Guvnor]

Hey again SUn and indigo


Yeah she should see me alright once to finishes, I have 2 other ak47 phenos flowering along side her, but she a different gravy from the rest, I think she'll finish up first looking at the structures of the phenos, and she looks to be the best yielder of the 3 by far.

Thats why Mg just didnt even cross my mind to tell you the truth- whenever another plant of mine has sufferd Mg def. they has been a noticable indications of mg def-like you said, the are overwhelmed by a pale colour throughout. Geuss I still have alot to learn-thats fine by me

All the best Sun and Indigo

Guv'nor

BTW- a different gravy- a different class. I really need to remember that the people of Ic dont live down the road from me, hence dont talk like a prat

 

[Guest]

Magnesium (Mg)
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water.

Speak in EC or CF please or perhaps include your conversion rating. For instance my tap water is 225ppm which lead me to panic. However, in verifying my conversion was @0.64 and my EC was 0.35 and referring to the below quoted reference I really have no need to panic as I'm just on the outside of 'Soft'; if the reference is to trusted.

http://cannabisworld.org/vbportal/forums/showthread.php?s=&threadid=71557

Water Hardness Rating
E.C. 0.0 Reverse Osmosis and Distilled water
E.C. 0.1 - 0.3 Soft water
E.C. 0.4 - 0.5 Medium hard water
E.C. 0.6 - 0.7 Hard water
E.C. 0.8 + Extremely hard, and too hard to be used for growing

 

[Verite]

Notes:
-- Yellowing of leaves can also be due to an iron def.
-- MJ plants have a Mg "hungry window" where feeding too much Mg before and after their hungry period is detrimental. I wouldnt boost Mg before 3-5 weeks of growth or 2-3 weeks before harvest.
-- All metal elements effect each other in regards to uptake and use. A perceived deficiency may be due to another element locking out that nute. This is why flushing and the clean slate start are the general recommendations for fixing problems or the start there of. [ see link ]
-- Some strains seem predispositioned to get the leaf margin curl when they mature. Im pretty sure that C99 is one of them since a majority of the pictures I see of them have that.

This link is geared towards soil and farming but the information should be enough to get the wheels turning. Peace

http://www.farmtested.com/56.html

 

[Guvnor]

Updates

Updates

Hey Verite - Nice bit of info there mate- Thanks for popping in again

Farmers
Yesterday evening I added half a teaspoon of epsom salts into my 3gal bucket- I should have added more (which I shall do) but the previous day, I had foliar fed with an epsom salts feed- So was alittle unsure if by adding the dose recommended by Sin, would cause a lockout. Since I only foliar fed twice, I doubt it would have any adverse effects by using quarter teaspoon to a gal? Rust patches have begun to appear

Temps are now sitting at 79 with humididty at 45-55, so I'll lower that soon, to around the 20-30 mark for the last couple of weeks. E.c is @ 1.2.

Attached a few pictures of the lady in question-Now at day 36. My camera is
not the best so do what you can with the pictures.

Cheers
Guv'nor

 

[nobodyknew]

Hi(gh) there Guvnor
First let me say your AK's look very good....
So far there has been no mention of PH levels and I was just wondering what that might be......
Mainly cos going by your pics that would look like a slight PH adjustment may be required - but no need to panic cos they really do look good.....
Here's one of my AK-47's at Day 27 - I'll swap - lol



All the best with yours.....

 

[Guvnor]

NobodyKnew
Thanks for the compliment mate- p.h has been around 5.7


All the best

Guv'nor

 

[Growdoc]

Go up to 6.0 and this lock out of MG will stop...

Growdoc

 

[Guvnor]

Following my last set of pictures-inwhich the plant was starting to display rust patches, has now for the most part stop. But in its place I have red spots over most of the fan leaves. Could this possible be a calcium def, caused by added the salts??

Plants sitting in ph(5.9) adjusted water now-so i'll see how she goes. Shes only a few weeks away and whatever problem(s) are occuring it hasn't seem to have had an effect on bud production, but maybe she would be packing on even more if the problem was sorted. I plan to run her on my next run, and would like to combat this problem before it occurs on the next run.

Any advice,thoughts or general abuse is welcome :smile:

Cheers

Guv'nor