Hi David, I find Oncidiums easier actually than Phals or Cattleya, just because it is a water hog, so overwatering is not an issue for it. I guess because our area has a long hot and dry period with very dismal humidity, so it dries up very fast. I can even leave it in standing water for a couple of days during summer and it will enjoy it, seeing the pseudobulbs plumping up again. I was mean to some of them before
I thought I can leave them in my growcamp during winter as long as I close the foil cover. Apparently not, they were struggling, but they bounce back when temps warm up and at times will send a spike in Spring, always hit and miss. Then there was a time, one of them sent a Fall spike as soon as summer temps ended. So I changed my approach and started bringing them indoors in late Fall last year, and they started spiking..ah, so that's my mistake! The temperature! So now I got some blooms lined up this late Fall to Winter.
Before it is only my Phals or maybe my Paphiopedilum that I can expect winter spikes.
One annoying thing with my Oncidiums, they always get those nasty specks on the leaves. I don't spray them water, it just gets it, so I think it maybe reaction to our tap water. I just water the root zone. But it survives. Anyway, I just trim the tips if it gets too ugly.
Phals for the most part I have to treat like a cold growing succulent. It enjoys the cool conditions but really need to keep it dry during cold season. And I avoid misting the leaves, saves me leaf rot issues. I know some would always recommend misting the entire plant, but that is not how it behaves here
And so far it works, and also allowing those fat roots room to roam, they so love the air, I think that is often the primary reason the plant dies, gets too suffocated and wet at the root zone level.
How are you with Cattleyas? I am not so good with them..have killed some, but I adopted one last year, Bc. Little Mermaid 'Janet' and for the first time I have a bud woohoo!!! Reading about it, they say it is fragrant too! So for sure I will add a photo of this one in this thread when it blooms.