Iv'e been combing the web to determine if any of the following are tip-bearers (TB), partial tip-bearers (PTB) or spur bearers (SB). As I understand it, the vast majority of apple varieties are SB. Here is what I have been able to determine so far -
Yarlington Mill = TB
Golden Russet = TB
Northern Spy = PTB
Jonagold = SB?
Liberty = SB?
Roxbury Russet = SB?
Wagener = SB?
In addition, I've been looking into bloom periods for the varieties below and have found a bit of a spread depending on the source. So far, I've found the following-
Yarlington Mill = ?
Golden Russet = "group 2" (of 5)
Northern Spy = late mid-season, late season
Jonagold = mid-season, "group 2"
Liberty = early mid-season, early season, early to mid
Roxbury Russet = ?
Wagener = early mid-season
Freedom = mid late-season
Jonafree = mid-season, early to mid
It appears there would be no problems with pollination including the triploid Jonagold if Y-Mill and R Russet fall into anything other than Early and Very Late seasons. Am I missing anything, my eyes are glazing over?