Help a noob out... leaf tips curl down

[Libalau-Timmay]

Hey All

Ive had these BubbleGum girls growing from seed for the past 3 months.

They are 6 weeks into flowering now.
2 plants Growing in each in its own 10Gal DWC Rubbermaid tub.

PPM 1600- 1800
ph 5.9
Air Temp is about 60 at the stalk & higher at the top near the buds, maybe close to 85.
Water Temp is 55

I have been using Highgrades method of feeding w\ GH nutes & Epsom Salts , Im not using ProTekt like Highgrade does.

I just fed both of them yesterday w\ the same nute GH mix and I come home from work and the 1 plant has curled leaf tips. Only the 1 though..

The tips are curling down . Any ideas. I looked around a little but most of the probs I saw caused thetips to curl up.?.?

Thanks for any advise folks!!

Timmmy

 

[Guest]

Most likely a little too much Nitrogen available.

 

[yourselfimage]

Pretty sure I have the same prob here. Haven't been able to figure it out.

 

[Libalau-Timmay]

hey yourselfimage it does look like we have the same prob. Any ideas ?

Tell us about your plants

Breed, Soil \ Hydro Nutes Temp , ph etc... lets find some things that are the same.

canine why do you say ?


Thx

 

[yourselfimage]

Strain is nirvanas durban poision in soil that is mixed with 1/2 cup blood/bone meal and peralite. Under a 400w HPS 3 weeks into flowering. Temps between 76-86 depending on ambient temps of the room. Ive been looking for a way to test pH but I can't find a soil pH tester anywhere so I have been not using any nutes and have been watering with distilled water. I think it might be due to high temps but I am really not sure.

 

[Texassativa]

I have had a bagseed plant do the same thing. I grew in soil mixed with blood and bone meal. She had curled leaves and brown tips all the way till flower. She still gave 3.5 oz. But the leaf thing gets on your nerves. Ph was 6-6.5. The meals were mixed 1/2cup each per 5 gallons soil. The plant was heavy sativa. watered with 6.0 ph, Medina Hasta gro 6-12-6, (10ml), maxicrop seaweed(cap full) per gal water.

 

[Guest]

canine why do you say ?


Thx

I'm no hydro guy, so keep that in mind. But the condition you are seeing can be caused by (in order of likelihood):

Too much N

pH too high (isn't 5.9 a tad high for hydro?)

Salts build-up

Root damage

Fungus

Directly from the mouth of a very trusted grower. If your roots are healthy and you're pretty on top of your nutes and know the N isn't on the high side, then I would first suspect your pH, then salts.

Hope that helps!

 

[Libalau-Timmay]

Thx a lot Canine, for the advise, that does help, now any suggestions??

I read a doc too that pointed to high N but Im a noob and not sure. How to test for too high N ?

Here is a quote from MynameStitch <-- thx Stitch

Hydro and Soil less Mediums
Nitrogen gets locked out of Hydro, Soil less mediums at the levels of 4.5-5.0.
Nitrogen has the best absorption rate at a ph of 5.5 to 8.0
(Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range to have Nitrogen is: 5.0-7.0. Anything out of that range will contribute to a nitrogen def.

Yes, I think 5.9 is on the high side but still within the acceptable levels , no ?

Salt Buildup This is something that is concerning me as I have not flushed the nute solution since day 1. I am wondering if a flush would help. Flushing isnt easy , those tubs are heavy, I need a small pump or something.

roots look OK I think , heres a pic.







fungus I dont think this is a prob but I havnt considered it either. I dont see \ smell any nasty. What to look for ?

 

[mace_ecam]

Claw is caused by toxic levels of N in the leafes, this can have a couple of reasons...

Highgrades formula was the first i think to be published for DWC... a lots of things have happened since highgrade

The GH Grow bottle contains a lots of ammonia, a fast release kind of N, combined with DWC (very fast release medium) its usually to hot. I don't like ammonia for DWC

Salt built ups = high EC in the rootzone in DWC, same thing

Anyways, go easier on the nutes dude keep your res topped with water or the EC will rise

your pH is cool

mace

 

[mace_ecam]

Ps: Your plants look great!

 

[Guest]

I agree. Like I said, I'm not a hydro guy, but your pH seems to be in the acceptable range. And your roots look very healthy. Fungus would be pretty obvious if it were present.

Don't most hydro growers flush like 2x a month? Seems like I've read that.

So yeah... I'd just back off your nutes a bit and see if the new growth looks a little healthier. (In my experience the old clawed leaves won't recover their original shape but don't worry about it.)

The plants do look good. Just a little tweak and I bet you'll make them even happier.

.canine.

 

[Libalau-Timmay]

Thanks a lot mace and canine , I will lighten up on the nutes.

Heres a nice bud site from one