curling leaves, any advice?

[balla420]

Hey, i'm in my first week of flowering. 4 female blueberry strain. ph is about 5.8 nut. sol is about 25 Degrees C i'm using and air cooled 400w hps light, the ppm has raised up to about 1200, but today i added more ph adjusted water, along with a dose of hydroguard, and the ppm's dropped to 965 here are some pics, best i could get, its wierd though because there is 2 leaves on one branch that turned yellow/brown and curled up, then one leaf on a different branch of the same plant is starting to get yellow/brown spot, that has been getting bigger (both problems over a period of about 3 days) all the other plants are fine, and the tallest one (closest to light) is fine, so i'm pretty sure its not from heat.

I was thinking about changing nut sol. a little ahead of schedual so i can flush the plants with salt leech, do you think that will fix that problem. can't wait to see these girls flower....... anyone know about how long it takes for blueberry to start flowring? appreciate any advice, i'm out, lata

[KamelRedLight]

Those are burn marks my friend. The last picture looks like 2 fingers touched something hot and burnt up. The middle one looks like light bleaching, what happens when my leaves touch a CFL, but I pull them off before they burn. It looks like one branch was touching a ventilation hose, is it scorching hot? It doesn't look like nutrient related problems, make sure the plants aren't touching anything hot.

Another possibility is hot spots created by the reflective foil on those vent tubes burning your leaves. Is it aluminum?

[GrowBot]

^^^what he said^^^ looks like they're stretching a bit. you may want to get the light a little closer. LOOKING GOOD!!!

[balla420]

hey, i can't put the light any closer, or it would be touching the tallest plant, i am using a 400w hps, and the leaves have never touched the reflector. again, thats why i'm so confused, because i know it looks like light burn, but i highly doubt it, because the tall plant is closer (width wise and height wise) to the light, and it is absolutly fine, so if that one didn't get burnt, how is another plant farther from the light going to get burnt?? that aluminum flex tube, is not hot (on the side with the problems, it isn't even warm) and it hangs over a different branch that is fine, so i don't think its the light reflecting off of that, any other ideas? think i will flush the plants with clearex tonight, and add new nuts.

[balla420]

you can see as well, on this one this same plant, the leaves are starting to curl down, but are staying green. does that help, identify the problem?

[urgr8estfear]

I see the light reflected off the metal tubes is the greatest on the tube on the right, so I'll assume the socket for the HPS bulb is on the left.
This opens up the possibility that the curvature of the metaltube on the right side acts as a lens and burns only a single leave.
Consider the design of a newtonian telescope for a moment ('hollow' mirror), the geometry seems just about right for this.
Flat tubes cannot have this problem.

[GrowBot]

if you can't move your light then tie them ladies down out of the way. try and even up the canopy, get it lower. you tell them what to do!