Leaves, bad signs?

V

Verwegener

Active Member

• Jun 26, 2007

• #1

Hi!

I recognize some irritations on leaves, even there are only a few in the lower parts of the plant i feel concerned.
Some tips turn slightly yellow and some, well, have a look please.

Thanks for your advice, Martin

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the widowman

Well-Known Member

• Jun 26, 2007

• #2

there really looking pretty good man!!! don't worry unless it gets worse

 

nongreenthumb

Well-Known Member

• Jun 26, 2007

• #3

Yellowing tips are usually the begining of a problem, if you ignore it, it may get worse quickly.

Do you check your ph levels?

 

dr greenthumb

Active Member

• Jun 26, 2007

• #4

its funny how ppl worry about the smallest things

 

nongreenthumb

Well-Known Member

• Jun 26, 2007

• #5

I used to think that a long time ago, but if you look after the leaves better then they will contain more thc so you could make some hash from them and the plant will grow better seeing as it lives because of the leaves, without them it wouldnt survive. By trying to keep the plant as perfect as possible will give better results and weed closer to the breeders description.

 

V

Verwegener

Active Member

• Jun 26, 2007

• #6

Yep! I feel very responsible for my plants. First i will check the ph, apart of that my thoughts circle around nutrition, some weeks ago i fertilized them with sticks, and maybe the effect diminishs and i have to repeat.
Regards, Martin

 

babygro

Well-Known Member

• Jun 26, 2007

• #7

Verwegener said:

Some tips turn slightly yellow and some, well, have a look please.

Click to expand...

Hiya Martin

Really nice looking plants dude, you've done a good job on those so far - well done.

Without really knowing what you've done or what you've been feeding the plant, all I can do here really is 'best guess' what the problems might be.

The little yellow tips are usually the first signs of overfertilisation, so if you're feeding the plant - ease back on it, if you're not, the soil might be a little 'hot' for the plant.

The little yellow leaf at the bottom looks a lot like either Mg deficiency (most likely) or Nitrogen, it's hard to tell the difference at the latter stages between them.

My moneys on Mg which could be being locked out by high water salinity and/or excess Calcium Carbonate in your irrigation water.

How old are the plants? 4-6 weeks old? I'd give them either a foliar spray of epsom salts at 1 level tsp per litre of water, or the same for a root feed as a precautionary measure.

 

WrldWidRadio911

Well-Known Member

• Jun 26, 2007

• #8

if the tip turns brown its neut burn

 

kieahtoka

Well-Known Member

• Jun 26, 2007

• #9

WrldWidRadio911 said:

if the tip turns brown its neut burn

Click to expand...

No, not really. Tips can turn brown for a number of reasons. One is in fact nute burn, but there are others such as: nutrient deficiency, heat stress, Ph fluctuation, and over watering.

 

V

Verwegener

Active Member

• Jun 26, 2007

• #10

Hi!
The plants were born at April 21st, means nearly 10 weeks.
I gave them nutrition sticks ( n12/ph6/po9 ) ,label says lasting at least 100days, on 4th of June, the soil i used was made especially for tomatoes and pre-fertilized.
Regards, Martin

 

V

Verwegener

Active Member

• Jun 26, 2007

• #11

I just made these high res pics to give a better sight:

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dr greenthumb

Active Member

• Jun 26, 2007

• #12

lookin nice whats the strain

 

kieahtoka

Well-Known Member

• Jun 26, 2007

• #13

Well since the damage is very minimal I'd suggest first try Ph'ing your soil and water. What, if any ferts are you using, and how often are you watering?

 

want_my_ink

Well-Known Member

• Jun 26, 2007

• #14

He mentioned twice he is using fert "sticks", this is only my opinion but the sticks never seemed to be a stable method for giving a plant nutes. I doubt that it causing your problems but still Invest in some quality nutes its worth it. It also looks like your plants are stretching for light. Do they spend a good amount of time in the shade?

 

babygro

Well-Known Member

• Jun 26, 2007

• #15

Verwegener said:

I just made these high res pics

Click to expand...

Martin

Those pictures show more of the beginnings of nutrient burn to the leaf tips, as I mentioned earlier. You need to stop using the time release fertiliser sticks and switch to a more controllable nutrient in liquid feed. The problem with time release anything, is you cannot control it, or how much is released over whatever time frame - and this is what causes the excess nutrient salt build up.

With a liquid feed, you can control exactly how much you feed and when you feed it, without risk of over-fertilsation as long as you feed at the correct levels.

As I also mentioned you also have a Mg deficiency on the lower leaves, it's this that's probably being caused by that excess salt build up, as high salinity can lock out Mg from the soil substrate. It could also be caused by an initial high salt EC of your irrigation water, that's something you need to check with an EC meter.

What it isn't is an out of whack ph, so ignore any advice about adjusting ph.

 

V

Verwegener

Active Member

• Jul 15, 2007

• #16

babygro said:

Martin

Those pictures show more of the beginnings of nutrient burn to the leaf tips, as I mentioned earlier. ...........As I also mentioned you also have a Mg deficiency on the lower leaves, it's this that's probably being caused by that excess salt build up, as high salinity can lock out Mg from the soil substrate. ......

Click to expand...

I just want to report, that removing the fert sticks (which i will NEVER use again) during repotting, and watering with ph about 6 plus a liquid fertilizer with added mg and ca stopped that leafe-problem totally!
Thanks a lot, babygro, i will get a spliff in december while thinking of you!

Peace, Martin