Your Encore Azalea winter leaves stay on the plant through the cold months. These are evergreen shrubs, so you won't see bare branches like you would with deciduous types. Some leaf thinning happens during harsh cold snaps, but your plants keep most of their green foliage all year long.
When I first grew evergreen azaleas winter caught me off guard. I watched my Zone 7 Encore plants through a tough January with temps down to 12°F (-11°C). My plants lost about 20 to 30% of their older inner leaves. Some outer leaves turned bronze-purple instead of dropping off. By mid-March new bright green growth was pushing out. Within a few weeks the plants looked full again. That first winter scared me, but now I know it's normal.
Your Encore azaleas hold their leaves year-round unlike deciduous azaleas. They keep making food from sunlight even in reduced winter light. Deciduous types drop every leaf in fall and shut down. Your Encores take a different path. They slow down but keep their foliage working at a low level through the cold season.
Some azalea leaf drop during winter is a survival response, not a sign of trouble. Cold stress in zones 6 and 7 triggers your plant to shed its oldest leaves first. This cuts moisture loss through leaf surfaces during dry winter winds. Your azalea keeps its youngest leaves and lets the old ones go. You'll notice dropped leaves come from inside the plant and lower branches.
NC State Extension calls Encore azaleas evergreen. Their azalea cold hardiness rating goes through Zone 6a. That means your plants can handle lows down to about -10°F (-23°C) before serious damage hits. But your planting site matters a lot here. A shrub tucked against a south-facing wall holds more leaves than one standing in an open field.
In my experience, zone 8 and 9 gardeners rarely see any winter leaf drop at all. Their mild winters don't stress the plants enough. If you garden in zone 6, expect the most thinning and plan for it. Zone 7 falls in between. Your leaf loss varies from year to year based on how cold and windy each winter gets.
You can help your Encore azaleas keep winter foliage. Add 4 inches (10 centimeters) of mulch around the base before the first freeze. Use pine straw or shredded bark for best results. Plant in a sheltered spot protected from north and west winds. These two steps cut cold stress on your roots and leaves. A little winter prep goes a long way with your evergreen Encore Azalea winter leaves.
Read the full article: Best Encore Azaleas for Your Garden
