When you say a 55 gallon greenhouse, are you talking about something like a 55 gallon fish tank? Are you looking for smaller orchids to go in there?
Ditto to what was said above in that it really depends on your conditions for what will be easiest.
That being said- One of my favorite easy growers is Prosthechea(Encyclia) cochleata. That one is tolerant of a huge range of conditions. Cold to hot, or on a windowsill year round, it doesn’t really seem to care about temperatures as long as it’s above freezing. It does fine in a range of light from slightly brighter than Phals(low light), Cattleya light (high), and even Vanda light levels (very high light). It grows vigorously and puts out a ton of roots with each growth. It is a sympodial Orchid rather than a monopodial, so if one pseudobulb gives you issues and rots, you can just cut it off and the rest of the orchid is fine. Plus it is a sequential bloomer that will be in bloom for 4-6 months, longer the older the plant gets, and possibly even year round.
Last edited by SaraJean; 09-02-2020 at 02:03 PM..
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