Porterweeds are great butterfly attractors for the sunny spots. So is Golden Dewdrop, which is in partial shade in my backyard & thriving. Both have purple flowers.

Allowing wild passion vibe to grow up into the bushes will ensure Zebra longwings & Gulf fritillaries hang around to lay eggs.

Floridata.com has a Plant Tag List so you can find plants for FL that attract butterflies...

Here is a link that might be useful: Floridata.com - butterflies

I have shade in the front of my yard and prefer flowers as well. It is a challenge to meet this issue.

I have found that Orange Justica and Fire Spike will both work in shade and flower.

Plectranthus 'Mona Lavender' PREFERS shade. I actually have it in my window boxes.

Also, Crossandra 'Orange Marmalade', loves shade and I pair it with the Mona Lavender...looks great together!

Shrimp Plants love shade and hummingbirds love this plant as well.

Florida Gardenia - which is a faux gardenia - can be hedged. It does tend to get 'leggy' and will need to be cut back at least once a year to keep it thick.

Ditto on the Porter Weed....I planted it in the front yard shade and also have it in the bright sun of the backyard. It seems to do well in both spots - which was a surprised to me. Same amount of flowers - which for me, is just a few on the stem. I've never been able to get it to bloom 100% on the flower stem....

Hope these suggestions help!