Leaves look like claws

[BennyBlanco]

The fan leaves on my plants are curling under and resemble claws also they are very brittle... they are nice green color and they do not look over or under fertilized. the plants are 30 days in flowering and they started looking like this about 2 weeks ago. they are in soil mix containing promix and perlite and I am feeding them tiger bloom and big bloom every other feeding
My leaves look exactly like this 100% the same
https://www.icmag.com/ic/showthread.php?t=220324

 

[blueberrydrumz]

yo, i have that one some too that where started in soil, if you say it aint overfert then its very prob copper defficiancy, try lowering you PH a touch so more copper can be taken up.. hope that helps

 

[nappybutbald]

Look if you are using tap water find yourself a 5 gallon water bottle feel it up let sit a day or two (to dissipate the chemicals your local gorvnment puts in the water) then add your nutr accordingly then adjust to the appropriate PH level and use it to water your plants. do not use nutr everytime you water. This is just what I do, it works for me and may not work for you but I am happy with my results. I have a 7foot plant right now that only two of the branches that is approximately two maybe three feet long and look like that. And only about 4 inches of it is like that.boggles the hell out of me. But over all she should be done in 30 days or so hoping to get 800 to 900 grams from her (dry).

 

[BennyBlanco]

Im using well water

 

[Weird Jimmy]

you're ph is out of whack... do you supplement dolomite in with that pro mix? I think pro mix has dolomite in it, but not enough (in my opinion)... You can try a flush with ph'd water, but that probably won't do much of anything.

I would just recommend a larger dose of lime when starting your mix.

 

[BennyBlanco]

Will this cause my plants any harm if not corrected this grow I only got about 30 days left

 

[nappybutbald]

Well Water has alot of minerals in it and must be taking into consideration. Flush like Jimmy says. Collect the water first and test the PH level adjust accordingly.

 

[jonnybgood29]

used to grow in pro mix as well, used to have the same flowering problem also, but not from the soil. i found that my water was so hard the udjusted ph would drift back up after sitting 24 hrs... called bounceback from tooo muck lime, calcium in the water. switch to ro, or try letting udjusted water sit for 24 hrs and readjust!

 

[someotherguy]

It looks very much like nitrogen toxicity which can be caused by a few things and i'm not qualified to list the pssibilities so i've linked Stitch's thread which is a MUST read, frankly i'd suggest buying a copy of her book 'Marijuana Garden Saver' which is available on Amazon for about $12.00, definately worth it's weight in gold.

Stitch's excellant thread

Anyway, her discussion of nitrogen deficiencies an toxicity is about half-way down in the first posting of the thread, ...and don't be put off by her less than perfect english as english isn't her native language, she really knows her stuff!

Peace, SOG

 

[BennyBlanco]

Thanks guys for all your help .....this is my first grow at my new house and I think the water is very very hard it leaves orange stains in our bathtub....im going to check the ph of my,water and go from there..anybody reccomend a cheap way to check my ph

 

[BennyBlanco]

Hey I just read stichs thread .... And it might be N toxicity thanks for the info someotherguy

 

[BennyBlanco]

How can I cure N toxcity

 

[jonnybgood29]

here is a chart that might help you.

http://www.growfaq.net/growfaq/97.htm


unfortunately it doesnt show the toxicity of nitrogen, but look at the curling of the leaves of ph fluctuation. the chlorosis and dead patches show up as it progresses.

nitrogen tixicity shows as leaf tip curling only like a cats claws and verrry dark green leaves that look almost black on some species follow by drying an leaf drop leaves dont lose color, just become crunchy and dry!

 

[jonnybgood29]

here is a pic

http://growweedeasy.com/sites/growweedeasy.com/files/nitogen-too-much.jpg

 

[BennyBlanco]

Yup thats excatly how my leaves look

 

[jonnybgood29]

just back off on feeding for a while and they will straighten out on their own. i used to intentionally cause it for the last few weeks before flower to get massive stretch and more bud sites before flower! just drop the nitrogen 1 week before flower to prevent delayed flowering!

 

[Tompo]

Is this N toxicity too?



Notice the tips arent curved like in N, but then what could this be?

 

[jonnybgood29]

if you notice how the lwhole leaf curves downward... it indicates a ph fluctuation/lockout just beginning to start. what kind of water are you using on your plants?

 

[Tompo]

if you notice how the lwhole leaf curves downward... it indicates a ph fluctuation/lockout just beginning to start. what kind of water are you using on your plants?

Thank you! This might be it. I just realized my ph-meter is off by a whole world. Recalibrated it and water that should have been ph 5.7 was actually 7.2

Edit: I have always been under the impression that pH will cause all kinds of visible problems before structural changes. I mean like burning tips, yellowing, different color spots etc, but not curling of the leaves. Great!