I really fell in love with growing Catasetinae species and hybrids while living in Florida. They love warmth, good light, and fertilizer. They are among the few groups that love to be fed!!
I purchased a few plants from Fred Clarke back in late June. He just may be the leading breeder in fine Catasetinae. Anyway, I repotted them all in straight sphagnum moss, not too loose and not too tight. Just kind of snugly in order to keep them upright.
If you have a chance to buy anything with Clowesia russelianum, or Rebecca Northern, or Grace Dunn in the parentage, you are in for a real treat!! Lots and lots of flowers on cascading inflorescences just over the rim of the pot. They are typically fragrant and long lasting blooms. I repot every year as they DO NOT grow into specimen plants for the most part. They have a tendency to split apart in a pot.
I repot every year, usually in early spring as the new growth commences. But here is what you look for when a Clowesia is 😃.



What you get is an abundance of these aerial, or birds nest kind of root developement. It will only get worse!! But these great wire thin, green tipped roots tell you that,
A the plant is happy
B you repotted it correctly
BigBill signing off for now! Please give these guys a try?!

Bill, what a great write-up!!
Repot every year, I think that's where I have been slacking.

Yes.
You should repot every year! As another hint, every time I repotted there wasn't much left in the way of the root system from 4-8 months prior. They were pretty much rotted, or mushy in somewhat lack luster moss.
I pretty much discarded all the roots that came away easily and removed 90% of the previous years' sphagnum. Once repotted, I waited for the new growth to be well along with 4-8 new roots penetrating into the new moss. These roots penetrate quickly. It was typically 6 weeks after repotting and I gave them Dynamite slow release fertilizer 20-20-20. Smaller growing plants got 1/4 tsp. larger
plants 1/2 tsp.
Simple as that.

And you still use Sphagnum. Maybe I need to rethink that one since it will be exchanged every year anyway. No time to go south, I suppose.

Oh yes, long fiber New Zealand moss. You can pot loosely and it won't hold enough water and if we pack it too tight, you'll block water flow.
Think of it this way. If we were Canoneers and loading our canon. We would not take out the ramrod and go tap, tap tap. It would not fire properly let's say. And if we take that ramrod and go hard, Bang, Bang Bang, and really pack down that powder and shot, the canon could blow up in our faces. We would like a happy middle for that canon. Think of moss the same way.

Bill, while I do get your point... Cannoneers? Not a real good example. We are all getting old, but not that old.
I would love to grow some of those, but I don't have the dedication it takes. I do buy other genera from SVO every year at the shows. He has great plants!

Canoneers! Yes I know, kind of obscure there but it was the first thing that I thought of regarding "tamping something" down.

It took me back to when my kids were young and we were camping in upstate NY. We went to Fort Ticonderoga. The guide said that during the French and Indian War, Canoneers had one of the shortest life spans on the field of battle. It seems that they were always the target of enemy fire.
Then came the part about the Canoneers being some of the best paid soldiers. Their qualifications were simply that they HAD TO HAVE 2 opposable teeth!!! This struck me as both funny and odd. The guide explained that two opposable teeth were required to bite the ends off of the paper cartridges!!!

But honestly growing Catasetums does not require dormancy unless your are in a very cold climate. I think that they are easy to grow, very colorful and can bloom 3, 5, 9 times a season. When is the last time a Phalaenopsis or Cattleya bloomed 9 times a year?

Interesting history and funny re: two opposable teeth, but these days that isn't a problem if you have dental insurance. If you don't, you should be saving your $ for the dental work, instead of buying orchids. I have the insurance, but lack the space, sun and have very erratic weather, so I stick with what will work for me.

Two opposable front teeth, loading a cannon -
Now that is a strong visual! Repotting an Orchid will never be the same!!

One thing I find totally amazing, that they really can bloom that often?

I had a cross that was a small dark purple flower, I don't remember the cross but it was a Fredclarkeara After Dark hybrid. That is why I bought it.
Anyway it produced two spikes in late May and as those flowers are opening, another spike appeared, then two more, then two more and the final spike opened in late September. By the time it was finished blooming, it had produced 9 inflorescences for 53 or 54 flowers.
The inflorescences were all around 9" long, semi-arching and came from a fat pseudobulb that looked like a " pregnant dill pickle"! I was totally amazed! It was too bad that they did this over a 4 month period because if I had been able to get that to judging with half of those flowers open, I would have a cultural award. No doubt.