sick plants - please help!

[nbuus]

Hi fellow growers!

I am having some trouble with my plants and was hoping, some of you could help me.


Here is the info:

Strain: Kalashnikova from GHS
Grow: Hydro (bubble bucket)
Temp.: 27°C (with the light on)
Humidity: 60% (light on)
EC: 1.18
Fertilizers: GHE (general hydroponics)
Tank volume per plant: 10L
Light: 250w hps (cooltube)

And i change the nutrient solution every week.

The plants' disorder started occuring about two or three weeks ago, i've put the plants to flowering cycle (12/12) one week ago (after 3 weeks of veg).


This is how the plants look like:

http://www.shrani.si/?31/pY/10qyaXYH/dsc02486.jpg
http://www.shrani.si/?12/3k/2v1lqB0X/dsc02487.jpg
http://www.shrani.si/?1c/xp/10JuVZ4T/dsc02489.jpg

 

[Vesuvius]

whats your ph?

 

[nbuus]

My ph is constantly 5.5.

 

[nbuus]

anyone???

 

[CannabisFox]

too few nuts?

 

[nbuus]

What EC would you recomend then?

i am using the GHE FloraGro&FloraMicro&FloraBloom
following this chart:
http://www.growing-life.com/shop/flora-series-hydro_large.jpg

and the EC i get is 1.51 (minus 0.33 from default tap water ec) so 1.18 EC.

 

[CannabisFox]

you cant just subtract the ec of your tap water.

well its hard to recommend something here... lets check the situation.
# its affecting only the lower parts. that indicates that we have a problem with N, P, or K.
# started before flower, increased with 12/12.

So maybe its a def of to few N which the plants need for the stretch. Also I hardly think its a def when you are feeding by schedule.

# Ph seems alright, although you shouldnt hold it strictly to 5.5.

variations between 5.3 and 6.3 in flower and between 5.1 and 6.1 in veg are good because the plants take different nuts better at different ph levels.
Also you dont need to change the res every week(make it every second week) unless the ph is going nuts. but as I said little variations are ok

whats always nice for hydro is using osmose water. then you can give the plants exactly the ec they need.

what are you using for ph adjustment? some of them are affecting the ec imo

 

[nbuus]

hey.

*when i change my nutrient solution, i make sure it has a ph of 5.5
In about few days the ph level goes up to 6.0 so i have to adjust (lower) the ph value every few days (to a minimal of 5.4 pH)

*for pH adjustment i use ''HESI pH corrector (minus) bloom''

*osmose water - i am not familiar with osmose water. Is this the same as distilled water?

*thank you for replying and helping! since no one seems to give a damn

 

[CannabisFox]

im not sure if adusting the ph that often can affect the plants. but its possible imo. so I wouldnt recommend to adjust the ph every few days.
6.0 is still ok. as I said those fluctuations arent that bad. just check that it wont go through the roof!

an osmose isntallation is pretty simple. I put mine at the connecton where my washing machine is usually. open the valve and trough one pipe comes out the water with 0.01ec (freshest water ever ) on the other pipe there comes the waste water...
but it wont affect the ph although you need fewer ph-minus when adjusting RO water(cause of different KH value I think).

Its not a "must have" but I've the nice feeling of giving my plants the best possible ^^ and ofc the water only contains the special minerals you put in.

 

[nbuus]

Thank you for your advice

 

[nbuus]

I seem to have another problem!

my plants are about 16 days into flowering - but still no signs of flowering, no hairs!

why could this be? Perhaps because of the stress from nutrient def or something?