Different times for different species in different zones. When I lived in Florida, I had a Juno that opened up late after dark and stayed open till 11:00am in the morning. Victorias open right after dark but don't stay open long after daylight. Of course, not many people have room for a Victoria water lily in their pond.

I have Trudy Slocum. It opens up late afternoon/early evening, a little after I get home from work, but before dark. It's a great bloomer with huge, huge blossoms.

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