Blc. with black spots/yellow leaves

[estación seca]

What is the ambient temperature? That kind of shoot loss happens with insufficient watering and with too-cool temperatures. The green leaf I see is wrinkled, suggesting the plant didn't get enough water at some time in the past.

It is hard to get good healthy growth on Cattleyas in a temperate winter, even with supplemental lighting. Most people's growing areas are too cool for strong growths.

[etcherkate]

Originally Posted by estación seca

What is the ambient temperature? That kind of shoot loss happens with insufficient watering and with too-cool temperatures. The green leaf I see is wrinkled, suggesting the plant didn't get enough water at some time in the past.

It is hard to get good healthy growth on Cattleyas in a temperate winter, even with supplemental lighting. Most people's growing areas are too cool for strong growths.

This time of year, the temperature is about 60 degrees overnight, and 65-70 during the day, depending on whether anyone’s home. I wonder if the leaves are wrinkled because I waited too long to repot? I also suspect that I burned some of the new root tips with fertilizer; I’m now mixing my solution at a quarter of what the manufacturer recommends.

I have an older book on orchids that dates back to when Cattleyas were the most popular orchids grown by hobbyists, a fact that I find baffling. Cattleyas don’t seem to like my conditions at all!

[Roberta]

Originally Posted by etcherkate

This time of year, the temperature is about 60 degrees overnight, and 65-70 during the day, depending on whether anyone’s home. I wonder if the leaves are wrinkled because I waited too long to repot? I also suspect that I burned some of the new root tips with fertilizer; I’m now mixing my solution at a quarter of what the manufacturer recommends.

I have an older book on orchids that dates back to when Cattleyas were the most popular orchids grown by hobbyists, a fact that I find baffling. Cattleyas don’t seem to like my conditions at all!

There are Catts and then there are Catts... so much variation in parentage, with some being far more forgiving than others. It's really important to know something about your specific plant, to determine the conditions that it actually wants. They do tend to be rather strong epiphytes - use large bark, let them dry between waterings and repeat. When repotting, it is critical to do it when new roots are just starting. That can be at any time in the new-growth or bloom cycle, depending again on parentage. (New growth and/or blooms are irrelevant, it's all about roots) Some root only once a year, others may do it more often. You just have to watch..once one or two new ones just emerge, do the potting, make sure that the plant is very stable in the pot. Then when more new roots emerge, they will establish and grow. But those new little root tips are so easy to damage, you need to pot when the plant is actively creating them - if you do it when it is just starting, those first couple might get damaged, but there will be more emerging shortly.