Propagate by division in Spring or Autumn or by herbaceous stem cuttings
Try to plant in a location that enjoys partial sun and remember to water moderately. Ulster Blue Dwarf is generally regarded as a hardy plant, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea).By our calculations, you should look at sowing Ulster Blue Dwarf about 63 days before your last frost date.