little leaf curl, lighter green on other plant and some spots

[bigmikeyg]

growing in cloth pot using promix hp mix

using sensi grow ph perfect at. rate of 4ml per litre (label rate) and ro water with cali magic at 1 ml per litre

in a 4x4 tent with 6 inch exhaust carbon filter and a kingbrite quantum board at 75 percent max draw 3000k spectrum ...

this has started recently...

the leaves on the one main line plant cbd diesel from seed started curling at top (first and second pic ).. and the other plant a gdp clone has gotten a lot lighter a shade of green .

see pics

any ideas ? al comment welcome :)

 

[Beachwalker]

PH perfect and RO water; What is the actual pH reading that you're pouring into the Pro mix?

 

[bigmikeyg]

PH perfect and RO water; What is the actual pH reading that you're pouring into the Pro mix?

5.45 sorry i didn’t get back sooner been out all day

 

[bigmikeyg]

also would like to point out that i’ve been struggling to get these ladies dialed in for how much to feed and how often .. this quantum board setup is new to me and i’m used to 1000w.. said screw it and went out and bought those soil moisture meters .. just to help me decide when :)

 

[Beachwalker]

5.45 sorry i didn’t get back sooner been out all day

Too low, promix likes 6.2, probably unavailable nutrients at that low of a pH

 

[Dirtbag]

Yeah it looks like ph issues for sure. What's your environment like, temp and RH?

 

[Lord Bonkey]

zinc lock out from low ph?

 

[Butts4Supper]

Too low, promix likes 6.2, probably unavailable nutrients at that low of a pH

Yup, 5.45ph is way too low. It's an easy fix in pro mix: ph your water to 6.1-6.3. I've always preferred 6.3 and that's my personal choice, when I use pro mix I usually cut it 60% pro mix 40% perlite, especially for auto's. Ime they(autos) like a drier root zone and make wispy little roots that are much different from photos. I don't have ANY exp with led lights but I do know that different spectrums drive the plant to consume different elements, just thought I'd mentioned that since you are under led. They also seem on the bright side of green, since nitrogen uptake starts to taper off in soil near 6.0. A source of nitrogen ph'd to 6.1-6.3 for the one in the tomato cage and I'd just run plain water ph'd to 6.1-6.3 as well to reset the medium on the other one and just wait and see how it responds. Chances are you've just created a lock out the good thing is that this is an easy fix. By this time next week you should be in a better position.

 

[bigmikeyg]

Yeah it looks like ph issues for sure. What's your environment like, temp and RH?

all this is well within the norms .. rh on the higher end but the controller still would not have kicked in the dehumidifier if i had it in there yet

 

[bigmikeyg]

Yup, 5.45ph is way too low. It's an easy fix in pro mix: ph your water to 6.1-6.3. I've always preferred 6.3 and that's my personal choice, when I use pro mix I usually cut it 60% pro mix 40% perlite, especially for auto's. Ime they(autos) like a drier root zone and make wispy little roots that are much different from photos. I don't have ANY exp with led lights but I do know that different spectrums drive the plant to consume different elements, just thought I'd mentioned that since you are under led. They also seem on the bright side of green, since nitrogen uptake starts to taper off in soil near 6.0. A source of nitrogen ph'd to 6.1-6.3 for the one in the tomato cage and I'd just run plain water ph'd to 6.1-6.3 as well to reset the medium on the other one and just wait and see how it responds. Chances are you've just created a lock out the good thing is that this is an easy fix. By this time next week you should be in a better position.

i tried that and still nothing. seems to be worse

think i’m gonna flip and see what happens lol

 

[BigCube]

I sit at 6.3 to 6.5 in promix hpcc and it loves it.

 

[Beachwalker]

i tried that and still nothing. seems to be worse

think i’m gonna flip and see what happens lol

Not best practice to put stressed plants into flower, I'd figure out what was wrong before I flipped if those were mine

Have you tried flushing those out? Use plain h2o @ 6.2

Finish the flush by giving them some pH 6.2 balanced nutes at 50% and let them absorb some nitrogen!

What are you feeding & at what ppm?

 

[bigmikeyg]

did flush... for run 6.2 for a week and a half and tried 50 nutes .. they started to grow but still lime green :(

 

[bigmikeyg]

i’m gonna do another flusher .. and see

 

[Beachwalker]

did flush... for run 6.2 for a week and a half and tried 50 nutes .. they started to grow but still lime green :(

How are you checking your pH? If it's a meter are you sure it's calibrated properly?

 

[bigmikeyg]

How are you checking your pH? If it's a meter are you sure it's calibrated properly?

Edit: I just re-read, how bad is your tap water? Also I'm not a big fan of pH perfect type products, maybe try something else see if you can get them to respond? Because something you're doing is causing that, so here's a few simple changes that you might try

i do ro water and my ppm isn’t high ... and yeah i calibrated the pen ...

 

[Beachwalker]

i do ro water and my ppm isn’t high ... and yeah i calibrated the pen ...

That might be problem, maybe you're not feeding a high enough PPM?

I like 300- 500 for my veg plants, small to large respectively. Get a PPM meter and stop feeding according to label instructions, if in fact that's what you're doing

To finish the flush I'd feed them some 20-20-20 at 500 PPM @ 6.2

Edit: I've seen a lot of problems including similar to yours with AN pH perfect, I'm not sure but I believe it's intended for hydro but @Aquaman would be the one to ask

 

[bigmikeyg]

That might be problem, maybe you're not feeding a high enough PPM?

I like 300- 500 for my veg plants, small to large respectively. Get a PPM meter and stop feeding according to label instructions, if in fact that's what you're doing

To finish the flush I'd feed them some 20-20-20 at 500 PPM @ 6.2

Edit: I've seen a lot of problems including similar to yours with AN pH perfect, I'm not sure but I believe it's intended for hydro but @Aquaman would be the one to ask

... been using it for the last few grows with out any of this issues like this ... gonna flush again... nutes yeah the ppm was 450 ish ... once i fed them after the flush..

 

[Beachwalker]

That may be, but it doesn't change my statement; search 'pH perfect yellowing' here and you'll see many, many complaints similar to yours with pictures that match your issue. Good luck, hope you figure it out!

 

[Butts4Supper]

been using it for the last few grows with out any of this issues like this

Just few a quick questions, is this reused media? Do you add cal mag to your R/O to bring back to 150ppm?