I would probably go for 'Orchid Lounge' which is a pretty open discussion area of things sort of orchid related.
Having said that... we are not strict on where you post things here. If something is obviously in the wrong place we may move it for you (mostly to help you get the right people looking at it and therefore responding), but unlike some forums no one gets upset with you if you post in the wrong place.
For many posts it can be difficult to decide where to post, so just pick the one you think is most relavant and go for it