The U.S. South and Southwest are used to sizzling summers, but as the world continues to set new heat records, even northern, coastal, midwestern, and New England regions are seeing more and more summer days topping 90 degrees.

That’s posing a threat to some traditional landscape shrubs that are native to colder regions and that don’t do well in heat. Heath, heather, yew, birds nest spruce, dwarf Alberta spruce, and enkianthus are examples of shrubs vulnerable to heat stress.

The late U.S. Department of Agriculture plant pathologist Dr. Marc Cathey, who developed the American Horticultural Society’s Heat Zone Map, found that 86 degrees is a key temperature waypoint for plants in the temperate world.

He said that a variety of setbacks begin to happen at that level, including a shutdown in chlorophyll production, leaf and flower-bud wilting, a drop in pollen viability, and subtle chemical changes in plant leaves that open them to increased bug attack.

Plants that evolved in hotter regions have found ways to cope with those troubles – even when temperatures soar into triple digits.

Horticulturists say that given the warming trend, gardeners are likely to be more successful when they choose landscape plants that are adapted to the coming conditions rather than ones that have done well in the past cooler temperatures.

When it comes to landscape shrubs, here are 10 that can take the heat and grow well in most of the U.S. All have USDA upper-end ratings at least into Zone 9.