I would bring them in. I don’t like to leave anything outside except, cymbidiums , below 50. They would probably survive lower temps but I don’t think it would be beneficial to them.

I wouldn‘t consider those types to need very high light levels so I don’t think you gain anything by leaving them out.

Your night temps are still good. I would leave them out until frost is predicted.

Seems your temperatures are still warm enough during the day.

When I grew in NY, usually by the middle of October, everything came inside.

These are nice temps for flowering Phals and the winter Catts.

If it stays cloudy and cool during the day over a extended period of days, I would bring them in. Otherwise, leave them be.

Jane

Strange things happening, this morning and 20 mInutes ago I couldn't comment to this post, now I can?

Mike,

Starting late last week, I've moved anything I care about inside for the winter. We're having similar temps here in Ohio. I left most of my varied collection (brought Phal violaceas types in a few weeks earlier) under the eaves of my house when we dropped into the upper 30's and lower 40's for a few nights over the last few weeks. No problems that I can see, but they were under an eave where they were protected and a little warmer than in the open. A few of the things that were in flower are now struggling to maintain those flowers after the drastic outside/inside environmental change.

If those plants are in the open, I'd move them in before that mid-30's night.

Good luck,

Bob

James, Jane, Bob, and Shavedmonkey, I can't thank you all enough.

I can see the point of leaving some out to initiate bloom, but then the weather here is so brutal and cold for such a long time before I even reach my max warmer temperatures in the day.

For instance, it will drop to the high thirties low forties before midnight, sometimes right after dusk, then stay that way until the sun is well up after 9 or so. The temps here can stay that cold for hours before the plants benefit from warmth which was a concern.

I can see if it gets cold for just a few hours then warm up in the a.m, but here, no such luck.

So with the majority thinking I should bring in the ones that do better in warmth, which means ALL of them except my dendrobiums which I will keep very dry to get buds will come inside.

I just don't want to chance them being wet too long with too long of the cold. I am gussing root rot and no growth will catch up in time.

I might even take a few and bring them in by night but ot by day for increased light as long as I can. Of course this time of the year in October, the sun is so minimal anyways and so that will call for lights even in a south facing window(

I did buy some cheap T12 shop lights I will hang over them , something different to suplliment on timers.

Thank you again and I just hope amny of them will spike despite not leaving them oustide. It's waste for me to grow orchids if I can't get them to flower again. That is why I have triple the same plants or more so chances are better . lol It never ends.

Thank you so much again. I can always count on the friends here to help me.

Many of them will be in a sunny 4 seasons porch which gets nice and cool and only gets heat from an opened door. It does not get as dry in there as it would up in my spare room with a skylight which is heated and can get very dry where I keep a humidifer and my Phals.

I too would advise you to bring them inside. IMO 30s and low 40s are too cool For your oncs. They can take the 40s but why should they if you have a choice?

BTW reading the list of names, I have all those in my onc collection. Lol. I love the chocolate scent of sharrys and the vanilla scent of the twinkles!

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I brought them all in. Wish I could get them all to re bloom. Maybe now that they are in they will? Time wil tell. My dendrobiums are still oustide loving it though. Keeping them on the dry side to encourage spikes. Hopeing this helps.

Thanks again.

Mike, I'm not too far from you (45 mins south) and all my orchids are still outside. Vandas are blooming like crazy. I promise they are MUCH tougher than we give them credit for! Temps above 40 for the coming week here, so they'll stay outside until then.

Suzabanana. not to be an enabler, but I hope you make it to the orchid show this November 8 to the 10th!! Close to you!! Thank you for the info..

Oh, and all of them are under L.E.D florurescent lights now thriving. I love it. Daylight bulbs and boy are they doing better than ever!!

Mike