Light green leaves on top

**ACSCorp** · 03-25-2008, 06:27 PM

First grow of Jock Horror. Everything was going fine until a few days ago when my biggest plant started exhibiting really light green leaves on the new blooms and burning on the edges of the fan leaves below them. Behind the plant in the picture is another plant from the same strain that does not show the problem. Same nutes, same soil.

My grow medium is a soiless mix of 1/2 coir and 1/2 peat moss with about 20% Miracle Grow Perlite (It's that fortified crap, I couldn't find straight perlite till just now).

Nutes are Fox Farm (Grow Big and Big Bloom). I have been mixing them as instructed on the enclosed chart but was doing a soil mix (I guess using this medium, I should of been doing the hydro formula, huh?).

PH was being kept at 7.0 but I have just recently dropped it down to 5.6 (after the proble appeared). My ppm meter shows levels just below what the Fox Farm chart says it should be.

I'm still using CFL's but want to switch over to 400 watts of MH. What do you all think the problem is?

Thanks

**Azgrow** · 03-25-2008, 06:29 PM

kinda looks like a zinc defeciency to me..but those pics arnt very good..can you take more close to the leafs...peace az

**Dirtyboy** · 03-25-2008, 06:33 PM

I think ya may have given an over dose of nutes. Lay off the nutes for a week and see what happens. If ya see them yellowing up then feed them.

**ACSCorp** · 03-25-2008, 08:17 PM

Sorry for the poor quality. Crapy digital.

Here is a closeup of the affected area.

**VictorVIcious** · 03-25-2008, 09:45 PM

jsut keep an eye on it, yes your ph was high for coco, you want your ppm down a little for it too, usually about 1 point below recommended. As an example for rockwool in bloom my hydro book recommends 2.4 ec. For coco they recommend 2.2 ec. SOme times a leaf has gotten some minor damage and it never affect any others. The other light green is just new growth, I am sure you know that. Nice looking plants. VV

**ACSCorp** · 03-26-2008, 06:00 AM

Thanks (again) VV.

I did a flush last night with straight water at a ph of 5.7 and the odd thing was I was continually putting in water and nothing was coming out. The pot has drain holes and I had prepared the bottom with a layer of tissue paper and a 1/2 " layer of perlite a week ago when I moved it to a larger pot. I noticed the top was all soggy so I poked a pen through the drain hole and water came gushing out!

Either an air bubble had formed or the drainage holes were all plugged. My water must have been accumulating in the bottom of the pot thus also causing an accumulation of nutes! Just hope I caught it in time. I ph'd the run off and it measured at 4.5.

My other plants are still tiny (about 1/4 the size of the ones in the picture) but I am still nursing them all along. I only germinated 6 of my 10 seeds initially in case I screwed up and germinated the remaining seeds this week.

I'll adjust my nutes as you suggested and hope for the best.

**ACSCorp** · 03-26-2008, 07:53 AM

Better digital camera with good closeups of the affected area.

Guess this can be a thread on how NOT TO!

**Azgrow** · 03-26-2008, 08:22 AM

wow you need to flush your plants with soome ph'd water,also how close is your light...peace az

**ACSCorp** · 03-26-2008, 01:34 PM

Already done. The lights were about 2 to 4 inches (four 30 watt CFL's). I increased it to 8 inches already.

**ACSCorp** · 03-30-2008, 09:17 PM

Flush seems to have worked. mant new shoots appeared and they are darker in color but still a little light. I also transplanted and will do one more fluch.