Both were about 7-8 years. They're about 18 years old now.
I put them in 5' treepro tubes for the first few years.
I've also planted: chestnut oak, white, red, pin, swamp white, bur, swamp chestnut, turkey, burenglish, shuettes, beadles, sauls, nuttall, shumard, and a shumard/northern red hybrid.
Just remembered, the chestnut oak has produced twice now in 18 years.
Along with about a dozen dunstan, I do have a 30' tall straight American chestnut that's beautiful. I hope to pollinate it with the genetically engineered chestnut they're working on.
The dunstans don't do well for me. They are multi-stemmed and die off alot.
This year will likely be the last year I plant oaks. Moving on to Apple varieties.
Wish there were a "habitat improvement " forum on here.