Ph/PPM in aeroponic

pincher · #1 10-12-2007, 11:11 AM

Hello,
I am a first time grower, using an aerojet 4x4. My veg phase went good, but I am having some issues during my third week of 12/12 cycle. I have looked at numerous guides, but get different numbers for PH and PPM, and just wondering if anyone here has been actually using aeroponics and can help.
I have been getting some leaves curling downward, mainly on my largest female. (also, a week ago I forgot to plug my pump back in, and they went 24 hours without a spray, so could that have simply caused permanent damage?)

I am using Supernatural nutrients, and it says to use 700-100 ppm, but i see people saying I can go up to 1800? Use the manufacturers recommendation or go higher? I am currently at 1300ppm.

Also, I see guidelines for PH such as 5.5-6.3, 5.8-6.0, 5.5-5.7, etc. Does anyone have first hand experience with aero that can tell me the true ideal range?

I will try to get some pictures posted as well..

Thanks!

MrIntricate · #2 10-12-2007, 02:28 PM

For 3rd week of beg, depending on how tall your plants are (that should be your main determinant for ppm), around 600-900 ppm. Better to stay lower than higher tough. I doubt your leaves are curling due to not enough nutes. Don't go to 1800. That's just nuts. That type of ppm should be reserves for late in flowering.

pincher · #3 10-12-2007, 02:34 PM

Sorry, I meant third week of blooming.. during veg phase they seemed fine.

pincher · #4 10-13-2007, 05:06 PM

I think I got it... I figured what the hell, and (meant) to bring my ph down to 5.7 last night. I must have put a little to much in, and when I got up this morning it was 5.5, and a lot of the leaves have uncurled. The ones that haven't are softer then they were, so I guess aeroponic ph should be 5.5-5.7. I have about 1400ppm with no burn noticed. I could see the difference in growth over night. I attached a picture of my 4 females - this is three weeks of veg, three bloom. I tried counting the buds on the plant in front, and gave up less then half the plant with over 60 of them...

pincher · #5 10-19-2007, 11:54 AM

take it back - 5-5.7 worked fine for a few days - leaves softened etc, but then started getting worse deficiencies, so back up to 5.8-6, and still a littel curling. I'm stumped, but they are still growing like hell.

email468 · #6 10-19-2007, 01:35 PM

I think your plants look great and it sounds like you are keeping a careful eye on them. I'll bet they turn out awesome!