I usually put all my Christmas cactus's on my porch in the same place every year with no problems. The seem to thrive outdoors. I noticed on my largest plant white "bleach" marks on several of the stems. Sort of like when you spill bleach on your jeans. These are like a very pale yellowish white on the leaves and very large. Usually two or three portions of the stem. I looked for spiders or mites or other problems but couldn't find any thing. What could be wrong? I don't want to lose this plant. None of the others seem to have any problems. ,Thanks for any help, Priscilla

to NGA Priscilla!

Could you post a photo of the white spots? That would probably be a big help for others to ID what's going on.

Hi Priscilla, from me too.

I agree with Ann, if you can upload a photo it may help in identifying the problem with your Christmas Cactus (Schlumbergera truncata). My first thought was possibly water spots but if none of your other Schlumbergera have the white spot problem and if there are no pests present and it's not due to an environmental issue (like sunburn or sudden change in temperature) the only thing I can think of is a possible fungal infection. I googled and found this photo for comparison with what you have on your plants: http://www.bing.com/images/sea...

Member @JB grows the Holiday Cactus and may be able to offer advice.

I will ask my friends on our Holiday Cactus Group. Please let me know when the pictures arrive and I will copy them and send them on to the other list and see what they say.

the weather switched from cool and cloudy to sunny and hot then the same all over again in my part of the north. My first thought would be sunburn. Does it look anything like this, which is possible sunburn on Christmas cactus (from Missouri Botanical Garden)?

http://www.missouribotanicalga...

@sooby, that link takes us to the insect and bug ID forum.

I realized that and corrected it, apparently not quickly enough Thanks.