Individual plants stay in bloom for about 3 to 4 weeks, with large clumps having the bloom period spread out over a slightly longer amount of time. I have had plants bloom in spring, summer and fall, but usually several plants will come into bloom at the same time, making for a nice mass display.
The best color seems to be in light shade or filtered sun where it develops a light purplish-olive tint.
In more sun, the color gets bleached out to a plain green.
They can take temperatures in the upper 20° F range without damage as long as frost doesn't settle on the leaves.
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