Answer: It sounds like you're growing your callas indoors in pots. They need fairly large pots (three in a 9" pot), in a well-drained, coarse but rich potting soil. Water moderately until the shoot shows more growth, then be more generous. Dilute applicationsof plant food on a weekly basis are recomended. Ideal temperatures are 50-55F at night, and about 10 degrees higher during the day. I'm not sure if Omaha qualifies as a dry climate, to be honest, but if your summers are dry, they would benefit from part shade if planted outside. Plant them out when all danger of frost has passed and nights are warmer. I'd guess the end of May would be fine for Omaha.
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