That is excellent information! Thank you SO much, that gets a star. I never knew there were two kinds of zinnias, one with resistance to fungus. The zinnias I'm experimenting with are Zahara, so lucky for me they are resistant kind. Have not been bothered by mildew on the tall ones that I grow in the garden either, but those are grown in our hot summers so maybe the heat keeps away the fungus. they are too tall for pots so I didn't include them. We had a cold (for us) night last night, I need to watch the temps.