[sam51]

planted my first and second lots of spuds, at the same time.
the late spuds desire are blooming 2ft high with flowers on,
the first earlys seem miles behind poor growth only about a foot high no flowers,  any one else got a problem with theres, mine look healthy
but seem slow.

[DD.]

Probably nothing to worry about. Some varieties don't flower at all and height of foliage varies immensely.