To get back to the OP's question: In South / Southeast US --
Try Outside Pride's gulf coast wildflower mix. The DOT uses this roadside from Pensacola - Tallahassee. Great forage. Seeds that germinate in the soil instead of a flowerpot are tougher, because they had to bootstrap their way to the top.
https://www.outsidepride.com/seed/wildflower-seed/gulf-coast-wildflower-seed-mix.htmlAgree 100% with Lemon Queen sunflower, if you have a place that will take the height.
Shrubs/trees: Vitex, vitex and vitex. Midseason flow, and if you shear with hedge trimmers, an August flow too covered with butterflies.
A deciduous small tree, it needs irrigation at first but is drought-tolerant when established.
No irrigation? Go for natives. Carolina laurel for early flow, will mature fast. Coreopsis sown in the dirt. Elderberry. Nandina Domestica.
Late bloomers welcome in the dearth: Aster and Goldenrod, somewhat invasive Spanish Needle is covered with bees all fall.
You can buy natives that need little or no care at a nursery like 7 Pines, DeFuniak FL.
Or, you can check charts like this one:
https://edis.ifas.ufl.edu/publication/IN1255Re: does it matter on a half-acre? Yes. IMHO bees putz around close to the hive in the evenings, and will work later when forage is close.