I think the only reason I ask this is because I've notice that my hibiscus doesn't get much activity from pollinators; so little, in fact, that I can't remember the last time I saw one in the flower and I go out there everyday to look at all the pollinators.
I found this very curious since the hibiscus flower is so large and I would think that the larger bees, such as the carpenter/bumble bees would be attracted to it since it's easy to work on. Instead I see them a lot on the Blue Fortune (they absolutely love that plant), Mexican Petunia (even though they can't fit in that flower, they resort to nectar robbing) and they also love the Cosmos.
But I also see them on other flowers, such as sunflowers, watermelon, strawberry, marigolds, and so on.... But never the Hibiscus and the Mexican Petunia is right next to it, but they fly right by those big red flowers and rob from the petunia flowers....WTF
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BTW, just to emphasis, I'm not just talking about the big bees, it's all pollinators, I just never seem to see them in the flower of the Hibiscus.