Catts are very easy to rot. They don't like too much water and I think they are doing best in basket. You shouldn't have problem growing catts, just don't water them too much... Brassavola likes to be watered every morning and dry by the evening time. About mr. R. Mueller crosses-very easy to grow!!! When I bought my first Mueller cross I was watering it more than I should've. Since I lowered the watering it is growing and blooming like crazy (as a matter of fact it's in bloom now!). Hope that helps!