Hi guys! I need some advice from the experts here. I have a couple of dendrobium keikies from july of last year. This year, back in february-march, the leaves developed some kind of yellow spots, within about a month or so. Since then the spots didn't develop further, didn't progress, didn't regress. The new pseudobulbs are ok, no spots on them. Only the old ones, from last year. Any ideea what this could be?
Here are some pictures. There are some sunburn spots, which they got because I moved them outside a couple of months ago, under full sun.![]()






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