Surprisingly difficult information to suss out! Apparently not many sources care about any distinction between male and female clones. This tree is described as polygamo-dioecious, meaning that while individual cultivars may be primarily male OR female, they also produce some perfect or bisexual flowers, which accounts for sporadic fruit set on what are suspected to be male trees.

I could only find one, very unofficial source stating 'Wildfire' to be a male clone.

According to Dirr and Warren in The Tree Book: Superior Selections for Landscapes, Streetscapes, and Gardens, Wildfire is a male clone. We've only planted a few (since they typically show some dieback after hard winters here) and we have not noticed any fruit.

Yeah I got a wildfire for the fruit. I read somewhere that it can take a few years to get a the flowers and fruit. I am only on year two. Awesome tree.

Thank you all for your help! This is what I was afraid of! Definitely a lesson learned for me! At least I planted some service berries as well!

I wonder if you planted one female species tree if it would be polllinated by the male 'Wildfires'? I have a lot of species trees and the berries, while small, are quite decorative against the flaming fall foliage, and the birds sure seem to appreciate them.

@sara how old is your tree ?? Do you have cultivator or straight species ?

That one is straight species and has been in the ground for about 20 years. I have maybe a dozen species trees and a few cultivars, too. I love Nyssa.

@sara that’s awesome! Seems like a few of the names I see on here often must have some really great yards. What’s your favorite cultivator ? I have green gable and wildfire. Was thinking of adding one more

To tell you the truth, the species trees are my favorites. That may be because they are the ones that I've had in the longest and so are the most mature. A couple of them were mislabled and turned out to be weepers; those are particularly attractive. Even the species trees turn fiery red in autumn. A great attribute of these trees (and the reason that I planted them initiailly) is that they can handle standing water and also are very drought-tolerant. I planted them in a spot where the ground is wet through May and then dries up like concrete until the rainy season begins in the fall. I do supply summer irrigation, but not much. And they are native to the US SE, so they are clearly fine in that climate or similar, as well.

Yup, blackgum can grow in wet or dry soil. They're about the best color in the oak forest right now.