Anyone grow Rocky Mountain penstemon?

last year

I had the seeds in my hand this morning but decided to put them back on the rack after hemming and hawing because my prior experience with native (to my area) penstemons has been they are mildew-y mess. What has your experience been with this one?

(BTW - the hybrids I have, Dark Towers and Blackbeard, haven't yet suffered mildew problems).

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