Sick girls, big garden, can't figure it out.

[milehigh]

Made a big change to garden a few months ago with new cabinets and ever since have had problems with flowering plants. The growth seems to be stunted dramatically, and the leaves are drying up and falling off. It seems to affect some strains more then others, and some all most not at all. Please have a look at the photo and give me idea's.

Grown in Dirt under 600W actively vented cool tube.

 

[Guest]

http://www.icmag.com/ic/showthread.php?t=11688&highlight=mynamestitch
looks to be zinc

 

[Core]

got some sillimar experience on my hands...sproutco thinks mine are mag def
dont think its zink though

 

[milehigh]

using new soil with correct additives. Ph seems to be in correct range, even measured run off and it is ok. So I don't think lock out. Some of the Sativa and haze plants seem to be affected the most. But all have stunted growth. The ventilation is not what it should be and will be improved and may be an excuse for slower growth but not the problems pictured. About 20 girls show a lot of this, a few show a little and some almost no problem except slow growth. The soil water and light are the same for all. I am just baffled. Ask questions please. Thanks in advance, this is a serious issue.

mh

 

[MTF-Sandman]

How about the details of your setup/environment/nutes/soil/water?

Looks like multiple nute lockouts/defs to me, but without details and more pics can't really tell what...

 

[Guest]

Sorry to hear about your girls man, are you with them now or are they 2,000 mile away, lol

 

[Allusive]

If you checked your pH and it is fine, then I would think it could be mag... IMHO the easiest thing would be to flush depending on your setup and then just measure the nutes carefully and go on the light side. Personally, in flower like that, I've had leaves do that due to too much phosphorus (which can lock out other nutes), too much bloom booster (hydroplex).

 

[sproutco]

Need more details like already asked. You tested the ph. What did you get? What is in your soil? Is there dolomite lime? What about your nutrients. How much and what is in them? Looks like another case of magnesium deficiency with the interveinal chlorosis starting at the bottom leaves and working their way up. Zinc def would be affecting the tops and they are still green from the picture. How many plants have we all seen like this in the past week? Mj may just be mag hungry. The excessive burning is throwing me off a little so add more details about your grow.

 

[richyrich]

The order I check things is like this.

pH - If you know your pH is OK and has been OK, next

nutrients - make sure your nutrient profile is OK, skip all of the additives and go straight nutes if you suspect nute problems (lock out, not enough NPK, etc.) you gotta figure out what is doing what. check the new growth tips in the next few days. if you still have problems, next

root health - if you have root rot you are gonna see all kinds of problems (defincienies). when i went through quite a dilemna, my leaves looked just like yours. i had signs of magnesium, sulfur and nitrogen deficencies all at the same time. was driving me crazy. when i finally checked the roots, the rot was setting in. if your roots are jacked up, your gonna get all sorts of deficencies because the roots cannot absorb squat.

my opinion is your roots may be unhealthy.

 

[milehigh]

Here are two more photos of the very worst ones. Thanks for the help.

8 or 9 litre pots, 600W HPS, Garden Shop soil with added coco, and worm castings. And a nute regiment of Rhizosys products including Bacto and MYCOR. Some of the soil was reused a second time, but the problem seems to be in newly potted plants to. It has affected most stains with the hardest seeing only slow growth. Wet soil at bottom of pots measure 5.5 to 6ph and .7 to .9 EC

We have added additonal fresh air just recently and switched to the best soil in the grow shop and are seeing some improvement but not enough.

Roots are healthy and overwatering and rot are not a problem.

 

[Allusive]

Hrm, since it's between the veins on a lot of the leaves, what is your phosphorus like, not due to a def but sometimes the affects of too much phosphorus can look like mag def, but without purple in your leaves I dunno. Still looks like mag the most to me. I would try switching back to the last soil/nute regimen that worked for you (I know, kind of an obvious suggestion...)?

 

[bubbaKu]

Since your ph isnt jacked up too high in the runoff, I wouldnt think it is rot. What color are your roots? Now, about the nutrients you are using, the bacto and MYCOR look like good stuff, Ive used similar products. The beneficials will bring your EC up by .2 to .6. What other products are you using? Fertilizer regiment? And are the pots sitting in standing water on tables?

 

[minds_I]

edit: nevermind

 

[milehigh]

Changed the suspect soil and seeing some improvements. Maybe to many additives.

Thanks for the input.