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 Lotsae
Registered: 04/10/09
Posts: 50
Last seen: 7 years, 6 months
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 Yellowing= sulfur deficiency? PK spike? 
#300818 - 10/20/09 10:59 AM (16 years, 6 months ago) |
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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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 Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal 
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Lotsae]
#300820 - 10/20/09 11:03 AM (16 years, 6 months ago) |
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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. 
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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coda
Registered: 04/20/08
Posts: 4,736
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Harry_Ba11sach]
#300957 - 10/20/09 05:10 PM (16 years, 6 months ago) |
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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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MFDoom666: sobriety kills my buzz every time.
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Lotsae
Registered: 04/10/09
Posts: 50
Last seen: 7 years, 6 months
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Re: Yellowing= sulfur deficiency? PK spike? [Re: coda]
#300988 - 10/20/09 07:25 PM (16 years, 6 months ago) |
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Yes, it started on the bottom. Leaf-wise, it worked its way from the outer edges to the center.
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coda
Registered: 04/20/08
Posts: 4,736
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Re: Yellowing= sulfur deficiency? PK spike? [Re: Lotsae]
#300995 - 10/20/09 07:38 PM (16 years, 6 months ago) |
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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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MFDoom666: sobriety kills my buzz every time.
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