I have ordered six winter hardy rose climbers. for this location zone
4b.

The Explorer series... for up here in Canada. I am about one hundred
miles North East of Toronto, Ont... We do have long cold Winters...

I will be planting them spaced about six feet apart along a Cedar
rail fence. At my cottage.

They will get full Sun for about four hrs. any help on preparing
ground would be much appreciated...

cheers Jak