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  Graphic Designer needs ADVICE Please.
From: Jill Bell godjillab at home.com> on 2001.12.16 at 00:43:15(7918)
Hi all,
I know that some of you will be able to help me with this problem, I would
like to fix it before it gets worse. I will describe the best I can:
Some of my larger leafed plants, like some species of Anthurium in
particular, are getting chlorosis. (I don't know the correct spelling for
this, I hope it is not too far off). It is occurring in the new growth, not
stealing from the old growth which makes me think that it is not nitrogen
chlorosis. Perhaps iron chlorosis? Whatever it is, I use soiless mix and I
think that my plants WANT something that I am not providing. Please tell me
what product to use and where can I get it, etc. I currently fertilize with
Peters 20-20-20 at half strength appx. once a month and use Super Thrive in
the fertilizer solution. I am not scientific unfortunately, or I would
understand what was going on better than I do, but I try to be a good plant
Please help me be a better parent.
Thanks all,
Jill Bell
From: "Derek Burch" derek at horticulturist.com> on 2001.12.16 at 04:24:50(7921)
Jill, stealing from the old leaves means one of the mobile elements. The
very most likely is magnesium, with potassium a close second. Magnesium
tends to show as yellowing around the edge of the leaf, often leaving a
normal green center in an inverted V shape.
Potassium is less uniform in its effects - it may be a yellowing, may be an
orange cast, or may be speckling of the older leaves as the element is moved
to meet the needs of new foliage.
The easiest source of magnesium to obtain and to apply is epsom salts,
magnesium sulphate. You can water with a solution or sprinkle it on the
soil. It is hard to overdose, but to be sure not to cause an imbalance with
potassium, try to find a source of potassium to give at the same time.
Potassium nitrate is a great material which gives a little bit of nitrogen
to the leaves and also lots of potassium to meet the need for that.
Unfortunately, potassium nitrate is a prime bomb-making materail, so take
some good i.d. with you when you shop for it.
Don't cut off the yellowing leaves until you can't stand them any more. The
plant will be taking some materials from them, as well as using the
supplements that you are supplying.
Good luck with stopping this yellowing. Don't look for the old leaves to
green up necessarily, but expect the new ones to stay green. Derek

From: Jill Bell godjillab at home.com> on 2001.12.16 at 22:11:37(7926)
Hi Derek,
The interesting thing is they are NOT stealing from the old leaves. It is
the new growth which is effected, I put the images on my website so you can
look if you would like. I am sure that I need magnesium because I have
never known that aroids had such a need for it before, so I will get some.
But I wish you would look, and you can click on them for a much LARGER look.
(Scott said that you and he would be looking with magnifying glasses) But
this is the best I can do for now.
I really appreciate the support and your knowledge and I have no doubt that
you will be able to help me solve this. I have spent the morning repotting
the damaged ones, washing off roots to hopefully get rid of any built up
anything that might be on them. So, I will get the mag this week and I do
fertilize with 20-20-20 regularly, so shouldn't that take care of the
potassium? Or do I still need more?

the above is the link for the images.
Thank you very much again,
Jill Bell
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