Is this Mg def?

[~Shhh~]

Looks alot like the pics I see of Mg def plants...

Lil history... plant was feed pH 4.8 water for a few days as pH meter was screwed and I didn't realize... It's still rooting through the rockwool block.

Had been on a diet of 1/2 strength formulex (starter food), rhizotonic and some silicone till then. I'm thinking the Mg was locked out with the low pH but since discovering it was the pen that was screwed up (4 days back) since, it has been feed 1/2 strength starter food (formulex) and rhizotonic and no signs of recovery yet...

Any advice would be great!

 

[Kryp Keeper]

cant see the pic

 

[forsakenangel]

k well im not the only one who cant see a pic

 

[~Shhh~]

Weird, shows for me I'll try again.

direct link:

http://www.uk420.com/boards/index.php?act=attach&type=post&id=364358

 

[~Shhh~]

Anybody?

 

[CrossEyedMary]

I can't see the pic but whatever problem you are having I think you already answered it. Your pH was too low. I'm sure they will snap out of it once this is fixed.

 

[~Shhh~]

I'll try this pic thing again.... fookin annoying whats with this old gallery forum gallery BS!

Direct link to my gallery-

http://www.icmag.com/ic/gallery/showphoto.php?photo=788339&ppuser=13264

I know what your saying, clearly a pH issue, but i was thinking I could maybe kick start recovery by foliar sprayin with something (1/4 strength nutes?) to help em?

Maybe just panicking as cant afford to lost clones

Can u guys see pics now?

 

[EvilTwin]

Hi Shhh...
No need to panic yet. Plant doesn't look that bad. Yes, I can see a very faint interveinal fading starting...or maybe it's the normal pattern for that leaf. My old eyes are failing me, I'm afraid. In any case, Mg is a core element in the chlorophyl molecule and is crucial for proper energy manufacturing. Marijuana loves it and uses lots. Some strains are worse then others, So I never wait for the inevitable deficiency and simply add 1/4 tsp of Epsom salts/gal routinely from the start. Does no harm.
ET

 

[CrossEyedMary]

I agree eviltwin, plant doesn't look that bad. Just get everything back to normal and it will be fine.

 

[~Shhh~]

Cheers guys! I guess with the other probs panic set in! Will give them some TLC and a foliar of epsoms to see if that helps

 

[Mr. Greengenes]

Rockwool cubes hold a LOT of water, and that plant looks a bit small for the size of the cube. Some people recommend soaking them before putting in a cutting, but I tried that once and went to a fast dip and shake instead. Even in the smallest size 'grodan' cubes the excess water keeps the roots from getting enough O2. I've noticed that smaller plants will show deficiencies that soon clear as they start to grow, as long as the cube is not kept too moist. If the cube is too wet, the signs of deficiences persist and the plant doesn't grow as fast as it's sisters.

 

[~Shhh~]

Thanks Mr.Greengenes, that may well be a factor as after the drought, I tended to water a lil more, which would makes sense alongside what you've just said, since then I have watered less & checked more. They seem to be rooting now and growth is coming along alot better, just looking for color to come back, do u think I should mist with epsoms? If so what is the rec foliar dose for epsom if u might know...

Thanks!

 

[Mr. Greengenes]

Geez, I don't know about foliar feeding, I haven't done it in years. I'm not really that hot on it, I figure it just adds one more unknown variable. If you want to use the epsom salts, why not just water it on the cube?

 

[EvilTwin]

Shhh,
I tend to agree with Mr Greengenes on foliar feeding. If the plant has functional roots...then I see no reason to apply anything to the leaves. I use 1/4 tsp/gal Eosom salts as maintenance and double that (or even more) for an advanced deficiency. As part of normal feeding.

On the rockwool cubes, what I've read from the manufacturer is that even completely soaked...there's still 40% air inside the cubes. Soaking is important for stabilizing the cube ph but a good wrist flick to expel excess water seems to get them about right.
ET

 

[growcodile]

foliar feeding often works for me as a quick fix, but you shouldnt overdo it by strenght and how often you do it .. once with a low/mid grade solution could be helpful ..

 

[~Shhh~]

Thanks guys appreciate all the help, in the end I just kept the cubes damp/ wet and stayed on top of pH & EC, they all seems alot happier and greener after some 1/2 strength nutes & vit B1.

 

[Mr. Greengenes]

Now that I read Growcodiles post, I have to say that's right. Foliar feeding is great for exactly that, a quick fix of a problem. It works especially well when there's already been some root damage and the leaves can compensate.