I've never eaten azarole, hawthorn or medlar fruit.
I'd like to taste them one day. I have planted trees and shrubs mainly for the use of the birds. The squirrels, possums and racoons also take advantage of any potential source of food. If I get any fruits or berries it is by pure luck. But that's OK by me. I am not really planting a garden as a food source for me, but rather do the yard work as a spiritual meditative practice. It works for me, and I get a lot of exercise.
I purchased my property five and a half years ago, and have done quite a lot of yard work in the succeeding years.
I xeriscaped the entire front yard, building raised beds for cactus, yucca, and similar arid plants, and diverted the rain run off around the sides of the house to the backyard where I have plants that require more water. The front yard looks like it belongs in Santa Fe rather than in Central Oklahoma. A surprising number of cactus are cold hardy if kept dry in raised beds.
The backyard abuts a city park that features an open mowed meadow leading down to a wooded riparian area. Which gives my own modest suburban property an expansive visita maintained by the city.
I am treating the backyard almost like a Medieval cloister, and have been planting trees and shrubs that might have once been found in such gardens. Hence, the medlar and the azarole trees. The Mexican Plum, which is native to Oklahoma, is the only tree plum that does well here. I am also looking to plant heritage roses, which are disease resistant.
I can't plant some trees and plants here due to the local problems with red cedar rust that effects many fruiting trees and almost all hybrid roses. I have been putting in a lot of labor building raised beds, paths, and drainage channels, so that in the future, the gardens will actually be quite low maintenance. Hard work now, low maintenance later.
I had been trying to locate a thornless cockspur hawthorn, some are sold under the name of Crusader Hawthorn, but could not locate one. Unlike many hawthorns, these are supposedly resistant to the cedar rust. But I was unable to find one locally or find a mail order nursery with one in stock. So, the azarole looked like a good optional choice, and it also would have been commonly found in Medieval cloisters in southern Europe.
I dare not plant quince trees due to the cedar rust threat.
How are your medlars doing in Western Washington State? That's prime apple country, so I suspect they thrive there.
I'll keep you updated on the azarole news this spring. I think it should do well here.