Claw Leaves

[dr.tomb]

Ive read that having claw leaves is often caused by too much or over watering. I am running an aeroponics self made setup. It uses the red spray heads. The roots then hang into the res, although the picture ill be posting the particular plant has next to no roots hanging into the res. I was running a 40sec on/160sec off but have changed the spray to a 40 on/ 320 off and the same thing is happening. Im still vegging and im running about 750ppm and pH that starts at 5.6 then drifts to 6.0-6.1 before I readjust. the temps are about 20C/68F in the middle of the day and 14C/57F just before lights coming on.

Any help would be appreciated.

 

[Dogenzengi]

From Wiki,
DWC hydroponic system usage[edit]


It is advisable to start this type of indoor cultivation with cubes of rock wool. Once the seeds are germinated in cubes of rock wool, put them into the DWC baskets previously filled with expanded clay pellets. Fill the DWC system with water and fertilizers that are hydroponic specific up to the level of the solution in contact with the base of baskets.
In this way, the clay will be in contact with the solution that will be absorbed by the plants roots. Soon the plant will develop a large root system that will naturally immerse in the nutrient solution. It will not be necessary to maintain the level of nutrient solution to the same level of the base of the baskets, but results will come with a lower level. It is recommended replacing the nutrient solution approximately once a week and wash the container / tank with hot water to remove any algae, mold and salt deposits. Every time you fill the tank, measure the pH of the solution and ensure that its value is between 5.5 and 6.8. Revise with the pH indicator. Constantly monitor the pH. The well-oxygenated and enlightened environment promotes the development of algae. It is therefore necessary to wrap the tank with black film obscuring all light.


I think you are running your PH to low. I am a Noob but as you can see the range for DWC lowest acceptable is a PH of 5.5, high of 6.8.
I run 6.0 as a standard.
Good luck, keep Em green!

 

[Dogenzengi]

Also as I reAd on another thread,
sometimes your water and you PH adjustment liquid don't go together well and it causes spikes in PH.
Google it.

 

[dr.tomb]

Hmmm weird.. I use a normal pH down solution. I visit my area 3 times a day and I have a trimeter in the solution continuely. The pH takes approx 5-7 days to swing up... Unless I have to add water.. Then I readjust immediately. Maybe my ppm is too low.. I noticed some light leaves on some of the growth... But would that cause the crawled leaves? I'm going to try 480s off and 40 on.

 

[computergroove]

Keep your water at 5.7 and check it everyday.

 

[superstoner1]

Ph is perfect, veg likes 5.6-5.8 and this is not from a noob. The clawing is a traditional sign of too much nutes. The clawing along with the very dark green screams too much nutes. Cut it back to around 500-550. Once the leaves are damaged they will never recover, watch the new growth.

 

[dr.tomb]

Thanks.. Started reading about nitrogen toxicity and thats exactly what it said. Cutting back now. The clawed leaves won't recover back straight?

 

[nameno]

If you keep the water level up to the plant not the pot it will grow faster,I got that from a Heath Robinson article tried it and it worked. I never seen SS be wrong,yet lol.

 

[justanotherbozo]

do a google image search for 'nitrogen toxicity in cannabis'

peace, bozo

 

[dr.tomb]

If you keep the water level up to the plant not the pot it will grow faster,I got that from a Heath Robinson article tried it and it worked. I never seen SS be wrong,yet lol.

Im doing aero.. I probably have a good 8" between the pots and the water.... are you thinking DWC?

 

[dr.tomb]

after correcting this toxicity, should I trim the old roots? should I cut the old growth back and regrow it out? how long should I continue veg for?

 

[Greenwhilley]

I think some strains are prone to claw. I have never had a problem with it until I grew white urkle, it claws even if you look at it the wrong way.

on my third attempt I managed to keep the claw away by either or both keeping the ph in the low range (for hydro) and less N in the feed. But late in flower she still started to claw.

 

[dr.tomb]

I think some strains are prone to claw. I have never had a problem with it until I grew white urkle, it claws even if you look at it the wrong way.

on my third attempt I managed to keep the claw away by either or both keeping the ph in the low range (for hydro) and less N in the feed. But late in flower she still started to claw.

SO just leave all the current growth and continue to veg for another week before the flip should be fine?

 

[justanotherbozo]

SO just leave all the current growth and continue to veg for another week before the flip should be fine?

you have to look at a lot of this stuff as practice for your next grow, ...in the beginning we all strive for perfection and because we lack experience we panic a little with every new thing we see.

expect losses and setbacks and treat them as learning experiences while you study, the more proactive you become the faster you will learn, remember that while this is new to you, it ain't new so get in the habit of HUNTING for your answers rather than waiting for them. ...and don't limit yourself to one forum, there are many and some have greater knowledge base's than others.

...and do image search's on any topic you're researching, you'd be surprised what you may find when you go digging.

peace, bozo