My orchid has a large bud on it. It is a very pale green and is very close to opening. There is a smaller tighter bud farther down the spike and another looks like it is forming. Yet the big one just won't bloom. It has been like this for around a month maybe. I decided to place it outside a few days ago in hopes that the natural humidity will help. I haven't seen much of a change though. How long can buds take to open?