The first was available for aechmeas if they don't bloom in 3-4 years . The apple when rotting makes ethylene , which stimulates blooming.
The second I heard and I think it is true.
The third - I don't know.
The fourth may work, but I don't think it makes the plant bloom and I wouldn't put the ice to touch the orchid' roots.
.But it may replace the frequent rains from the tropical forests...
But it's still available: DISCLAIMER: To those of you who may be new to growing orchids, all of the above are completely false. I'm posting this so that 1) the myths of orchid growing may be debunked, and 2) some of them are quite amusing and someone might get a chuckle out of them.