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OfflineLotsae

Registered: 04/11/09
Posts: 50
Last seen: 5 years, 5 months
Yellowing= sulfur deficiency? PK spike?
    #300818 - 10/20/09 12:59 PM (7 years, 1 month ago)

I have a few plants whose leaves are starting yellow enough to cause alarm. The bottom leaves are even turning yellow on the ones that are more nitrogen-rich and a darker green, as well.

I'm starting the third week of flowering today, medium is 70/30 perlite/verm, I'm using the full line of Earth Juice minus catalyst and Meta-k. I'm also using the Grow solution as well, even though I am in flowering I like to keep a little nitrogen in there and EJ's Bloom solution has zero nitrogen.

I am also using the microblast which is a complete line of micro nutrients, except I don't see sulfur listed. Could this possibly be from S deficiency? The only reason I think this is b/c the veins are turning yellow, as well, and not staying green.

Also, less importantly, can anyone recommend any good organic methods of inducing a PK spike?

Thanks, pics attached.











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InvisibleHarry_Ba11sachM
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Registered: 04/20/08
Posts: 11,753
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Lotsae]
    #300820 - 10/20/09 01:03 PM (7 years, 1 month ago)

I don't know about your plant, but I can say that sulfur deficiencies are pretty rare, so it's not likely, but once again, I don't recognize what's happening there, so it could be correct.  :shrug:

Secondly, the only thing from earth juice that's worth using is catalyst and possibly microblast. I tried them for a couple grows, and the second I switched I slapped myself for not trying other things sooner. EJ is a pain in the ass


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Invisiblecoda


Registered: 04/20/08
Posts: 4,734
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Harry_Ba11sach]
    #300957 - 10/20/09 07:10 PM (7 years, 1 month ago)

Micro def's begin at the new growth and work down.  Which direction on the leaves did the yellowing start from?  I'm assuming it began at the bottom of the plant?


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OfflineLotsae

Registered: 04/11/09
Posts: 50
Last seen: 5 years, 5 months
Re: Yellowing= sulfur deficiency? PK spike? [Re: coda]
    #300988 - 10/20/09 09:25 PM (7 years, 1 month ago)

Yes, it started on the bottom. Leaf-wise, it worked its way from the outer edges to the center.


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Invisiblecoda


Registered: 04/20/08
Posts: 4,734
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Lotsae]
    #300995 - 10/20/09 09:38 PM (7 years, 1 month ago)

Outer edges to the center point to an N def.  Sulfer, Iron, Mg all start on the new growth and work from the inner leaf to the edges.


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Cannabis, Marijuana, Ganja & Greens >> Cannabis Cultivation

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