Christmas Cactus Spots?

susansmsJanuary 25, 2014

Our Christmas Cactus has developed discoloration of some leaves that turn into hard white areas. We have the plant on our lanai in Florida, where it has been somewhat cold at night--50 degrees. In the daytime, the lanai is about 70 degrees. Any idea what might be the problem, and suggestions as to how to fix?

Thank you.

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I'm going to go out on a limb here but are you near the ocean? To me it looks like water spots from the salty air. These plants can usually tolerate 50 degrees but maybe the humidity in the air condenses on the stems. That's my best guess with the info provided.

    Bookmark   January 26, 2014 at 3:53PM
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Tiffany, purpleinopp GardenWeb, Z8b Opp, AL

I wonder if this is oedema.

"Oedema is a disorder of plants caused by the roots taking up more water than the leaves can transpire. This excess water ruptures the cells, particularly on the undersides, and leads to water-soaked patches that turn corky and unsightly."

    Bookmark   January 27, 2014 at 10:49AM
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Christmas cacti LIKE cold, so it's not the 50 degree temperatures you referred to. How compact is your soil? If it's too compact, it can affect the leaves, usually making them thin and wrinkled looking.

    Bookmark   January 29, 2014 at 1:35PM
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