That's interesting about the Canadian zone system, Caroline. With so many factors in play regarding plant hardiness it can only be a good thing to consider more than temperature. It's not uncommon for plants to be sold around here as Canadian hybrids and that is used as a sales argument, meaning they should be hardy also for the Swedish climate!
I hope the Eremurus will do really well for you in pots and that they will bloom the first year
. Some, but not all, of the Ruiter hybrids I planted (with a reasonable root size) bloomed the first year from a spring planting, but took a break the second and bloomed again the third year.
