I would guess most varieties will do as well as any other in S.E.Scotland; you would need to hope for not too many late frosts each spring. We grow, among others, Gijnlim which is an all male F1hybrid (which might be one to go for if growing from seed) as well as the old favourite Conover Colossus. The latter is certainly reliable and probably more readily availble for seeds if you are not going to splash out on year old crowns. Whatever way you grow, the key for asparagus is soil preparation.