My latest bud break was to a cider apple graft. It could be a combination of sloppy technique on my part and possibly later bud break for the cultivar, Bitter Pew. This is a first try with this scion, a cider apple found in the state of Maine circa 1900, and grafted to Bardsey. It is so small by now I will wait to air-layer/marcot it until next year.
If you have Honeycrisp and initial it HC, that bodes badly for either the stock it is on or the placement, near as I can tell blindly from here.
The two that are latest to break buds in my collection are Lamb Abbey Pearmain/Budagovsky118, and Edelborsdorfer/Geneva41. EdBf is in its fourth leaf since buying the whip from Cummins.
I grafted LAP onto Budagovsky118 last year. It was last to take, but grew slowly throughout the 80 day dearth last summer. Edelb. bloomed on just two spurs this season, its first, and set one fruit. If all goes well, this will enable me to enjoy an apple that folks have eaten since 1175.
Lamb Abbey is a small tree, so I might have to wait a while before allowing it to yield a debut sample fruit, lest it be further stunted by making seed.