Does a vigorous rootstock mean it can be difficult to get blooming after pruning?

[sockworth]

@marten

bend branches – branches that are more horizontally-oriented tend to produce flower buds faster.

And also try pruning in late summer after growth stops, as described in video in below thread, which is supposed to induce flower bud creation. Also, cultivars affect precocity. More than half my apple trees are fruiting on 3rd leaf (m111 rootstock), but my Fuji has not. Fuji was not precocious for me based on my limited experience.

Summer pruning apples

I thought this video was interesting and well explained, especially at the 10 minute part. [The IMPORTANCE of Summer Pruning an Apple Tree - Part 1 of 2]