Stumped!

[tip302327]

Most all of my plants, Hash, Blueberry, Tashanity,and a few bag seeds, seem to be having the same problem. 3 week veg clones all the way thru 5 week flowering plants but at different stages. This is my 5th grow which certainly does not qualify me as an expert grower but I do understand the basics. I am stumped!

Coco w/20% perlite. Second use, flushed to EC of <80 PPM and treated with
CalMag to 250 PPM.

Indoor, sealed grow room adding CO2 @ 1200 PPM (no air enters or leaves grow room).

Lights on 72 -77F / lights off 65F

RH 45% flower room and 65% veg / clone room.

Fertz. Base h20 250 PPM + DutchMasters Gold A+B to 600 PPM.

Runoff averages 500 PPM with ph @ 6.0 - 6.3

2000W HPS. in flower room 24" from canopy

2, 2 bulb 4' floros and 4 18" single bulb mounted vertically in each corner in veg/clone room.

Pics are from younges, least sever to oldest, most sever.

The last pic is of what is left of a blueberry plant that I have since scrapped.
I have 3 week old clones and hope to resolve these problems to save the strain. And finally, yes there is some mite damage but is now at least under control.

The only thing I can think of is my PH meter is off? I calabrate it once a week at least.

I have done everything I can think of and seems the problem is just getting worse! Help! Thanks in advance.

[volak]

looks to me like nute burn, just my opinion, i may be wrong.

[stinkyattic]

I can't get the pics to enlarge but there are a couple things I would check. Your nutes and conditions sound fine in theory but there's three things about the pattern of damage that make me go hmmm...
1) Splotchiness and evidence of desiccation on the leaves. Are you certain that you don't have mites? I can't enlarge so it's hard to see if the splotchiness is more like little white freckles. Check for tiny webs/eggs under the leaves and chew-marks on top.
2) V-shaped tipburn. You flush often/recently? Usually I see that and say 'soil salting!' but combined with the other two factors it might not be so simple.
3) Severe down-curling of the leaves. Usually that indicates either nitrogen overdose, suffocation (but you add CO2), or a problem with your roots in relation to their home. From here, your pot size looks big enough but your soil looks kinda wet. What's the drainage like? ESPECIALLY with used media, I'd add EXTRA drainage, including perforations in the SIDES of the pot. When I grow in any pot over a gallon I make sure there are several 1/2" side holes drilled a few inches from the bottom to help air circulate better. This will also help you prevent or heal the dreaded root rot. If you have root rot, the plants will act root bound and wilty. If you have areas in your soil that never dry out, the plant can't use them, and will also act like it is rootbound.
I'm going to add that if you ever re-use media, it's not a bad idea to spread it out to dry completely before you use it again, and even bake it in the oven to sterilize. Whatever you do, make sure that you let your pots get quite dry between waterings. Fresh coco is difficult to over-water, but as you get into some older media that has decomposed a bit and has root particles and such in it, it will start to behave more like plain ol DIRT, lol.
Oh also, if your plants are sitting in trays, make SURE that when you water to runoff, they never sit in the runoff water. Prop them up on something to prevent that.

Summary:
-Check for bugs
-Avoid re-using soil indoors, put it on the veggie garden
-Give good air circulation to the root zone by adding drainage and holding back on water

[tip302327]

Well now, I must look like an idiot. I was searching for info on what I posted above and tripped over this post. Sorry bout that stinky, I didnt realize you had replied and dont want anyone to think that I was wasting your all time. Anyway here it is 2 months later and I am still fighting this same problem. My BB plants both look leathery or dried out leafs with brown spots and brown leaf edges. I am completly at a loss of what is going on. I am strict with my ph (meter) and keep it at as close to 5.8 run off as possible so it is never below 5.7 or over 5.9 and to date havent went over 999 PPM with the fertz. The above grow has since been chopped and was weight wise, well sad to say was poor. On to this grow.

I started with fresh baled coco and flushed it until the run off PPM was:
-less than 90
-PH @ 5.8
Out of desperation I switched from Dutch Masters gold to H&G cocos A + B
All of my plants besides one (which looks perfect) show signs just like the
above pictures but not that bad (yet).

I am at a total loss. It would be easier for me to grow bud from a rock. lol
I just dont understand how my plants can be doing so poorly when I keep the PH dead on and am using quality hydo nutes in coco thats drains excellent. I had to laugh somewhat the other day when one of my OMMP paients dropped of 2 lemon kush plants about 3 weeks old. I asked him what they were in and he said dirt from the backyard. What fertz? Miracle grow from under the back of the sink, 7 years old. Go figure. I have thousands invested and spend 2 hrs a day. He walks in with 2 plants in dirt, thirsty, rootbound with shit fertz and they look better than anything I have growing. Fu....!

These plants, from seed were in beer cups, maybe 9" tall. I transplanted them into 1/2 gallon pots with the same treated coco I have been using. The plants look perfect and are growing at a very fast pace. 10 days later I checked the roots and was shocked to see the bottom of the coco completly solid white with roots. I transplanted into 2 gallon pots. Someone tell me WTF. Why are the 2 plants from seed doing so well and all but one of my clones (5th week) flowering look like shit. Same soil, room, temps, PH, R.H., fertz, bla, bla, bla.

I have come to the conclusion that there is something fundamentally wrong going on here. I will get some fresh pics up tomorrow.

[tip302327]

I have uploaded a few pics of my current grow. As can be well seen, these plants are showing the same problem as the last grow in the pics above. 2 weeks ago I turned off the CO2 and started bringing fresh outside air in via a 400CFM blower since the way the crop is growing it was just a waste of gas.

Pic # 1

These 2 plants (Lemon cush) from seed are 30 days old and about 10" from rim of pot.

Pic # 2
This is a BB plant 5th week flowering.

Pic # 3,4 and 5

Random seeds of unknown strain but more sativa.

I chopped 2 small plants today to check the stem and root ball. The stem color looked fine but there was hardly any root mass at all. Matter of fact, it had not grown much at all, if any on either plant since I transplanted them
5 weeks ago right before flipping to 12/12. There was no slime and what roots there were were not abnormally brown. Just no growth. Any ideas?

[tip302327]

Just some more pics of the same crop.

The first pic is a close up of the first plant above.
All the rest are various plants at different stages of problems. I am aware of the mite damage.