sii ----- the bag is to just allow inside of the bag to stay humid, which can stop the orchid from drying out.

The damp moss is used as a sponge thing, that can release the moisture in to the air inside the bag, that helps to keep the inside of the bag humid.

The plant is placed in a position that doesn't touch the damp moss ----- and that's mainly to prevent parts of the plant from staying wet for too long ----- and some parts of the plant staying wet for too long can lead to rotting, fungal growth etc.

Also, not sealing up the bag completely (ie. allowing at least some air-movement into and out of the bag area) allows for air/oxygen exchange --- and also could cut down on unwanted organisms like fungus/bacteria or something..... from growing on the plant.

Ok, is this what it should look like? The bag is open, plant away from the damp moss.

I'll keep it out of the sun.

I think that looks quite ok.

Also check this link here : (click here).

It’s sort of different ways of accomplishing the same thing. If the plant is undergoing “KelpMax therapy”, it may be potted up, as the new roots will grow into the medium relatively quickly. The inverted plastic bag is a way of reducing stress on the plant while it is recovering.

If you’re trying sphag-and-bag with an unpotted plant, it should not be in contact with the moisture source in the bag. I have usually used soppy paper towels as the moisture source instead of moss, and I’m not growing anything in paper towels! In that case, once roots begin growing, you can then pot it up in whatever medium you want.