Another issue to consider is that any malady that attacks one plant, be it fungal or insects or whatever, would now likely be trouble for four plants.

tj

Might not be the best idea to combine them all in the same pot.

Maybe plant them all individually in clear pots, then take those clear pots and put them in a larger pot and cover the top with moss, making it look like they are all planted together. This way, you can swap them out if you want, and address fertilizing and watering concerns per plant.

These are the two most common size clear pots and are the most durable. The ones with slits in the sides seem kind of flimsy in my experience.

Clear Orchid Pots

You might want to check out what RePotMe has. I've thought about doing this too though with Oncidiums instead of Phals. Possibly with a couple compact paphs I have. Hmmm I do have a couple mini phals also. Maybe a net pot would work to ensure more even airflow.

Jane, would it be that much different than having a large orchid in a pot? The roots would grow 'round each other I suppose and you'd be fairly stuck keeping the same plants together forever...Might have to ensure you're planting them with their leaves parallel to each other so they don't crowd. This would be for Phals. I've got a couple multi-crown paphs that look like three plants in a pot and also a couple seriously overgrown Oncidiums (they came that way).

One of the local orchid stores here-she regularly creates centerpieces of multiple orchids (4-6) planted in a single pot, but these are (as Jane says) very large, shallow (with respect to height) pots.

Everything else aside, the only real issue I can see is what to do with this great big pot full of plants... :-) Mine get moved to mini-greenhouses near windows when they're done blooming. A big 10 inch pot would be a lot to move!

Look for a long rectangular pot most often used for growing bulbs like hyacinths or amaryllis keep in individual pots placed in display pot and cover with moss and voila you have a very attractive display for a windowsill or table decoration. 3 plants would look best together.

Thank all of you for your great replies. Wish I could wait til the right time of year to think of repotting my phals, but NO . . . . . . . . . . in the dead of winter here, but they're pushing to get out of their crazy little plastic pots NOW!