Yes, but you'll probably just kill off all your plant's current roots. Look up semi-hydroponics for orchids. The trick to get them to root in water is to do it when they are putting out new roots that will adjust and grow into it. The old roots will not survive being suddenly submerged all the time, and rot away. You'd be better off trying this experiment when the root tips are just starting to push out. Hydroponics requires moving water for good aeration, and I've heard of people growing them in full hydroponic set ups, but it seems more expensive than it's worth. Sticking it in water isn't hydroponics, so you won't get the same results as either of those methods, but maybe with enough water changes and nutrients added, you might have some luck. I'd highly recommend the semi-hydroponic method if you just like that kind of culture for orchids.

I have tried it,it works. As stated, all of the old roots will deteriorate but new ones will form which are adapted to the new environment. I saw no reason to grow them like that as it was more work than it was worth. The water gets grungy and has to be changed but the plants will adapt.

There is another way which is different but less work. Grow them in nothing. I have a few Cattleya which were mounted but the branch deteriorated. Termites or some other wood boring critter reduced the wood to a mere shell. The plants are fairly large and instead of tying them to a new branch or wrestling them into a basket or some other contraption, I just passed a couple of wires through the rootball and they are hanging thusly with no pot, branch, basket or anything else. Of course also no bark, moss or coconut. The don't seem to mind at all.

Orchids are very adaptable.

Nick

"Orchids are very adaptable"

LOL Tell that to the several Phal bellinas and violaceas I've loved and killed through the years *crying*

Faelies may be the exception. I do best with the few Phaelies I have be growing them mounted.The potted ones are in hygroton and grow SH. Sphagnum moss does not work for my Phaelies even though it works well for many other genera namely the Bulbos and the cloud forest plants.

Nick