Do oncs bloom from the same bulb twice.. or once they send up a spike is it not possible for it to send another one.. do i need to wait for a new growth to get a new spike?
Oncidiums bloom from their new, mature growths. At least mine do. I don't know if there are any that bloom on old previously bloomed growths, but I doubt it.
well since you can get spikes from either side of the pseudobulb, would it be possible for a plant to bloom off the old growth if only only one spike came from that mature pseudobulb the year before?
The new growth will come from one side of the bulb or other. I don't think they will bloom and put out a new growth from the same side. So if it bloomed from both sides it wouldn't be able to send out a new growth.
no but say miltoniopsis, sharry baby, or whatever, some times you get one from a pseudobulb, and sometimes you get two growing at the same time, one on each side of the pseudobulb. If only one spike is sent up this year, next year, in addition to the spike on the new growth, could another spike appaear on the mature growth?