• Projected mid-century warming here is among the largest in the temperate Western Hemisphere (~4 °C under SSP3-7.0); the parkland-boreal boundary is projected to advance north substantially, with the grassland-parkland boundary moving in turn.
• Aspen dieback across the southern Alberta + Saskatchewan reach tracks the same warming-amplified drought signal seen in Wasatch and Colorado aspen.
• Garden-relevant: cold-hardy prairie + parkland natives (Saskatoon serviceberry, buffaloberry, prairie sage, native flax) carry forward strongly; cold-hardiness ceases to be the binding constraint while summer drought tolerance becomes more important.