I had an all green one 40+ years ago, back in the days when I had a large gh. It did get huge and only bloomed for me once and I missed pollinating it. I remember the flowers only last one day and it has to be pollinated first thing in the morning - as soon as the flower is fully open. I just bought a variegated one from Tropiflora just because I like the leaves. No illusions here about it blooming in my lifetime.
