I grew up in Bradenton, FL and was always looking for and trying to grow flowering trees. Don't remember seeing mayhaws or hawthorns there in zone 9/10. However, when we moved to Gainesville In north FL, mayhaws/hawthorn grew wild in the woods. The fruit was smaller than wild crabapples and had a large pit in the center, not pretty fruit, yellowish color. Heard some people made jelly out of it. We have different varieties of wild hawthorns here in NC with wild ones on my property having the worst long needle-like thorns you ever saw. Worse than poncyrus trifoliata ever thought about being. Makes loads of flowers in spring and loads of tiny haw apples in fall though. Crabapples easier to process for jelly though and not as thorny. You probably don't get enough chilling hours in zone 10 FL to get haw to bloom, or they would be noticed in the woods and planted along interstate highways there like they are in north FL.