Double, giant cactus-flowered Zinnias?
I have a few dozen NK (=Northrup King?) zinnias, planted from seed, surrounding my clump of three Agastache plants. There are taller ones called "Giant Cactus Mixed Colors," and another, shorter one that is also double-flowered, with shorter petals, and also in mixed colors. They're just starting to get buds, and I imagine they'll be blooming in a couple weeks or so.
I did a search on the forum for zinnias. Several people mentioned being surprised at how good they were at attracting hummingbirds. However, they all seemed to be growing the single, more wild type zinnias. I would have preferred single-flowered seeds, but I didn't see any on the rack, so I satisfied myself with the usual double ones. On the forum, there was mention of double-flowered zinnias, but no one seemed sure whether they get used or not by the hummingbirds. My guess is that they may not be as good.
Does anyone have any definitive experience with the double flowered ones? Do the hummingbirds use them?