Magnesium Difficency?

[Opie Yutts]

I would keep giving them nothing but PHd water until you see the new growth going nicely without yellowing, then start adding nutes slowly beginning at about 1/3 strength. Look at the charts and use a PPM meter to determine how much nutes too use, or keep increasing slowly until you see small signs of stress, then back it off a touch.

[razzapiggy]

I think Stinky was under the impression that I used soil that's why she was saying the Ph was way too low. My PH is generally right in the correct area (I use the cheap kind of Ph checker so it's hard to get it to to .X but its very close with the color coding)

Perhaps it's time to invest in a ph stick...

I gave em phed water for several waterings, and recently went back to the ferts (2nd watering back tonight) I'm at 600 PPM. Honestly, like 85-90% of the plants aren't really getting that yellowing or browning on the leaves, some of them are a bit burnt around the edges of the leaves (nute burn I believe) Uggh, I am a little frustrated.

[razzapiggy]

P.S New growth is normal color.

[razzapiggy]

anyone?

[Opie Yutts]

If the new growth is normal, that's good news. But watch it carefully for signs of stress. Just keep your PH around 5.5 and your nutes at the proper PPM, and everything should be fine.

Also, did you check the problem charts I (and others) posted in the problem area?

[razzapiggy]

Yeah, I have those resources save on my favorites, and looked at them before posting. It's honestly hard to tell if it's nute burn, or magnesium. They look fine, new growth looks nice... have my PPM at 860 right now. I have about four weeks to go, so I'm going to give them a high Phos. blooming nute (Shooting Powder it's called) for a few weeks, then do a ten day flush at the end. Will post some pictures.

[Opie Yutts]

Perhaps it's time to invest in a ph stick...

They're like less than $25 at the hydro shop, and it would be the most valuable use of your money in your entire set up.

If you have 4 weeks to go there may be little or nothing you can do about the yellowing. It is completely normal in many varieties for yellowing to start about this time in your grow.

[sane]

I think it is nute burns too. what hydro system do you use? do you have all the same clones/strains,or is it of a mixed variety. that could explain why most other plants are not showing symptoms. flush and give a dose of the Advanced product Revive as directed. That will correct any deficiancies if you are locked out.

[razzapiggy]

I only have like three weeks to go so I'm not positive a full flushing will do all that much. Since I want to hit them with the Shooting Powder (high in Phos) very shortly, and then flush at the end, this will set me back quite a little while. Right now I water by hand so flushing would be quite the proccess (next time I do ebb and flow)

It seems most of the plants are now showing signs of whatever this is, but new growth is fine... and the buds are coming along damn quickly... kinda confusing. I have two different strains in there as of now. I just don't get how I'm burning them at 900 PPM..it makes no sense to me.

[FireTheft]

no no ... still flush ... 3 weeks is a ton of time....just because its soiless doesn't mean your ph can't get out of wack.