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06-27-2015, 08:50 PM
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Senior Member
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Join Date: Apr 2013
Zone: 9b
Location: Davis, CA
Age: 29
Posts: 212
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Thanks for all the suggestions. I know it's definitely not a calcium deficiency. I am currently using both solid crushed oyster shells as well as a liquid calcium/magnesium supplement. It's been overcast in San Diego today and the black spots haven't reappeared, so it's most likely sunburn.
Last edited by MrHungx; 06-28-2015 at 06:41 AM..
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Post Thanks / Like - 3 Likes
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06-28-2015, 05:23 AM
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Senior Member
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Join Date: Jul 2011
Zone: 6b
Location: Springfield,MO
Posts: 830
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I had this same thing happen to a couple of my Cats this summer, I had the realization that it is not sunburn they were just cooked! It happened in approximately 1 hour in late afternoon sun. Sooo sad...Jean
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06-28-2015, 10:51 AM
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Senior Member
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Join Date: Jul 2012
Zone: 8a
Location: Athens, Georgia, USA
Posts: 3,208
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Calcium is reported to translocate poorly into existing leaves, etc. If you recently purchased the plant, it may be that you are providing enough calcium now, but maybe less was provided in the nursery? Just a theory.
FWIW, I would be thinking about sunburn as the cause and moving the plant to lower light, just in case.
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Post Thanks / Like - 2 Likes
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Tags
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plant, black, infection, infected, rot, set, orchids, entire, portia, var, emailed, vendor, fear, hausermanns, beginning, coerulea, catt, due, deficiencies, nutrient, silken, acquisition, recent, treating, supplements  |
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