I am a little confused... (bare with me, I am new to this!)

Say I want to make the Nox Orchid... I choose Nox & Orchid and it gives me a list of both flower and plant combos. Does this mean that any of the combos on their own will make the Nox Orchid, or do I have to pick one flower combo and one plant combo, and combine the results of each or ...? (Hope that makes sense! lol I need some coffee, I think.)

Thanks in advance!!