Leaf problem

[gamdwtj]

Hello, all smokers and tokers


bit of a leaf problem
indoor
hydroponic
coco medium
dripper system
tap water
water ph 5.7
6 weeks veg from seed and 3 weeks flowering
canna coco a+b ,cannazym, canna boost
feed times 6am for 6 minutes, 12pm for 6 minutes, 6pm for 5 minutes at 1.7 ec

light, 400w hps 16-18 inches
temperatures, day 25 c° night 19 c°
%rh 50-60
light schedule 12/12
rvk 125mm intake, 125mm outlet
plant height 72cm white rhino

[gamdwtj]

sorry heres the pics

[gamdwtj]

PLEASE HELP ANYONE
WHERE IS STINKYATTIC

[gamdwtj]

PLEASE HELP ANYONE
WHERE IS STINKYATTIC WHEN YOU NEED HER ?

[Weedhound]

I'd love to help but coco.....Pharma Can does a lot of coco growing.....where is he....??

[gamdwtj]

cheers anyway weedhound

[gamdwtj]

heres another pic of a dead leaf seems to be in the centre of the plants i think maybe there not getting enough light. all the leafs round the sides and top are spot on anyone got any ideas.

[PharmaCan]

anyone got any ideas.

Yeah - Chill! Too much worry gives ya heart attacks and hemorrhoids. :D

I'm no problems expert, but that looks like physical damage to me. I get those mutant shaped leaves every now and then too - never much gave them a second thought.

PC :smokin:

[gamdwtj]

Dont think it's physical damage cause i take extra care when dealing with my ladies. It seems to be spreading from the bottom middle where it is almost dark even attacking my older fan leafs do you think this could be poor air movement or poor light where the canopy is thick or both or should i just ignore it

p.s cheers for the input pc

[Weedhound]

Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com (http://www.planetganja.com/highsociety/showthread.php?t=8778)

This is a good link to check out....

[gamdwtj]

possible phosphate and potassium deficiency do you think 3 1/2 weeks into flowering?

[blink_inc]

lack of light and air circulation sounds right.
looks pretty crowded in there.do you run fans down low?

the rest of the leaves look quite healthy to me.

[hybridlove420]

Hello, all smokers and tokers

light, 400w hps 16-18 inches
temperatures, day 25 c° night 19 c°


18 inches is pretty far for 400w. does it get that hot? cuz i have an unvented 600w that can safely sit at about 14 inches (12 or less will eventually cause stress-13 is my limit), mind you its a large room

but its a nutrient problem if anything. just my 2c

[gamdwtj]

top oscillating circulation fan running flat out just bought another fan to put at the bottom. air intake at bottom air outlet at top as for light im just going to have to bend them around, as for the light i can let it get to 14 inches but when i do it shows signs of heat stress. more pics of how the bottoms looking.

[stinkyattic]

The plants look pretty healthy overall and I've just got a couple questions/suggestions:
-Light penetration to low parts of plant may be insufficient. That would cause sloughing-off of leaves that don't get enough light to be useful to the plant.
-The origin of the coco- Are you certain that it was rinsed? Was it the good stuff, or one of the 'off' brands that carries a lot of residual salt with it? Even sunleaves is said to be a salty one. That's something to check.
-I see you are using a coco specific nute so I assume that it contains something to make up for the habit coco has of scavenging calcium.
The underside view isn't really something I'd be worried about. It looks normal- mostly healthy and green, a couple old yellow leaves, no margin or tip necrosis. Adding ventilation is a good call. If anything, I would suggest you are low on calcium but only slightly. In general those plants look pretty darn good. Consider a good flush before placing them into flower.

[gamdwtj]

Cheers stinkyattic much appreciated info.

It was an off brand of coco, i flushed the shit out of them and they have been in flowering for 3 1/2 weeks. i'll let you no if the fan sorts it out.

Thanks to everyone who had an input :rasta:

[gamdwtj]

possible phosphate and potassium deficiency do you think 4 weeks into flowering?

The fan didn't sort it out does anyone know if it's a nute deficiency ( phosphate + potassium ) ? :rasta:

[stinkyattic]

I don't know, it just really does not strike me as a K or P deficiency.

If you like, go ahead and do a light foliar feeding with a bloom nutrient that contains micros and is mixed MUCH weaker than the bottle recommends. I don't think you should foliar with a grow nute, as you appear to be totally fine on N and don't want to overdo it.

Those drying tips and the slight tip scorch in the pics of the individual leaves really make me think that you've got some type of salting issue there. But it is not severe by any means.

Now is a time to work on prevention of future problems:
With coco, feeding to a slight runoff each time (about 10% is standard) is a good idea. This gives you a constant but slight flushing effect and helps prevent medium salting. Have you tried doing a comparison of the pH/EC going INTO the coco vs the pH and EC coming OUT of the coco? I'd check those numbers. If the 'out' EC number is equal to or higher than the 'in' number, you have cause for concern.

[gamdwtj]

I do the 10 to 20% runoff . i'll get on to check-in ph and ec runoff tomorrow and let you know. here's a few pic of how she going :rasta:

[stinkyattic]

And we have a winner! Those pics tell a good tale...
Your leaf edges are curling up slightly. While the plants are very healthy, you are running a bit warm close to the light. The fan will help a LOT but that is a symptom of mild heat stress often combined with arid conditions. The damaged leaves beneath won't heal, but if the problem has not progressed, you can be reasonably assured that you now have a handle on it.
With that runoff, salting shouldn't be your main problem then. Good.
What is the source of your tap water (well, city, other)?
Those plants look excellent to me. You perfectionists, lol.

[gamdwtj]

What is the source of your tap water (well, city, other)?
Those plants look excellent to me. You perfectionists, lol.[/QUOTE]

out in the sticks ec out of the tap 0.63 slightly hard, as for the light running out of room about 2 inches left to move it up. I think i might be in the shit with that.

how much more do you think they will grow up
Thanks for the compliment :rasta:

[stinkyattic]

Well since you're out in da stix we don't really know what is the major contributor to the hardness of your water but whatever, really your plants are fine, lol... except that you're out of room in early flower! Uh oh spaghettios.
Plants often fully double in height from inception of flower to harvest time. I don't know about your individual plant but you may want to plan for a taller space to move into if you run out. eek!

[gamdwtj]

I don't know about your individual plant but you may want to plan for a taller space to move into if you run out. eek![/QUOTE]

Eek indeed, my grow box is 2 meters tall and the light is at the top there's no room left, what's the worst that can happen? :rasta:

[gamdwtj]

Now is a time to work on prevention of future problems: Have you tried doing a comparison of the pH/EC going INTO the coco vs the pH and EC coming OUT of the coco? I'd check those numbers. If the 'out' EC number is equal to or higher than the 'in' number, you have cause for concern.

I checked my tank and it was sat at 1.71 ec and 5.9 ph .
so i lowered the ph to 5.6
watered plants about 30% runoff and the ph came out at 5.6, ec came out at 1.74 .
what should i do stinky ? :rasta:

[stinkyattic]

I'd pour some plain pH-adjusted water through the pots by hand (=flush), discard the runoff, refill the res with your bloom nute, and continue flowering.

[gamdwtj]

Nice one, i'll get on and do that.
i lowered the ec to 1.56 yesterday and ph stayed 5.6 watered the ladies for a 40% runoff and the ec came out at 1.58 ph 5.7 . Is this a bad thing and why has this happened? :rasta:

[PharmaCan]

Nice one, i'll get on and do that.
i lowered the ec to 1.56 yesterday and ph stayed 5.6 watered the ladies for a 40% runoff and the ec came out at 1.58 ph 5.7 . Is this a bad thing and why has this happened? :rasta:

If you go to the Canna website and read all of their propaganda about coco coir and coco nutes, somewhere in there you will find a statement to the effect that coco runoff is not a good indicator of anything significant. I suppose if your runoff was way acidic or way alkaline it would be cause for concern, but trying to micro-manage your nutes vis-a-vis the runoff apparently won't work with coco.

PC :smokin:

[stinkyattic]

And actually .02 difference in the EC of the runoff isn't even significant- betcha that's actually within the instrument's margin of error.
PC, I didn't know that about coco. I did know that coco scavenges Ca and releases K, so the mineral contributions to EC might be a little screwy, but that's an interesting tidbit. What an odd medium.

[gamdwtj]

Thanks pc not alot of people know the in's and out's of coco looks like i better do some reading. few pics of what they look like now. :rasta:

[Piid]

listen the leaves lookes nutrient burned to me so i would just use plain water for a while...it happened to me the leaves where getting fucked so i stopped with the nutes for a while and everything was all right after about 2 weeks the plant was healthy again!