Put them in a paper bag and put them somewhere in your garage where they
will stay dry. Otherwise, just plant them. I have sorted them by color and
stored iris risones over a year in the garage, but only 2/3 rds of them
lived. It is best to plant them now. You don't have to cover them with
dirt. Half of them can be out of the ground. It always takes mine two
summers to bloom, so the sooner you can get them in the ground, the sooner
you will see color.
In my climate, four-o-clocks are not hardy in the ground over winter, and
they take a long time to bloom from seed (as late as late August). One year
I did buy the tubers, and was very happy to get flowers starting in July on
very large handsome plants. I would do it again, but they haven't been
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