No, summersweet is not evergreen. Your plant is a summersweet deciduous shrub, which means it drops all of its leaves once a year and grows a fresh set the next spring. If you want a shrub that stays green right through winter, this one will not do that job for you.
In late fall your green leaves shift to a warm golden yellow and then fall to the ground. What you are left with is a set of bare brown stems, not the glossy green leaves you see on a holly all year. The change happens fast once the nights turn cold, so do not be surprised when your shrub goes bare in a week or two.
That summersweet fall color is one of the better reasons to grow the plant. The yellow tone glows when the late afternoon sun hits it, and it holds for a couple of weeks before the leaves let go. Then your shrub goes fully bare for the cold months. You trade winter green for a strong autumn show, and for many gardeners that swap is worth it.
The word deciduous just means the shrub sheds its whole leaf set each year on a schedule. Most trees and shrubs you already grow follow this same pattern, so your summersweet is in good company. The leaves drop in fall, the plant rests all winter, and new growth pushes out once the weather warms again. A summersweet deciduous habit is normal and healthy, not a sign of any problem.
One quirk catches a lot of new gardeners off guard. Summersweet leafs out very late in spring, often weeks after the plants around it have gone green. You might look at the bare stems in April and think the shrub died over winter. Give it time and the leaves will show up, usually by late spring once the soil has warmed. Scratch a stem with your nail first, and if you see green underneath, your plant is fine.
Your bare shrub still has plenty to show in the cold months. After the white flowers fade, summersweet forms small brown seed capsules that line the stems like tiny beads on a string. These capsules hang on through fall and well into winter, and they add real texture to a quiet garden bed when little else is happening.
Leave the spent flower spikes on the plant in fall instead of trimming them. The dried brown seed capsules hold their shape through snow and frost, giving your bare shrub a finer look up close all winter long.
If winter structure is what you want, learn to value those capsules and the bare branching form of your plant. The stems have a clean upright habit that reads well against snow or a plain fence. This is where the real Clethra winter interest comes from, since the shrub gives you shape and seed heads instead of green leaves through the cold season.
Still, bare stems are bare stems, and you may want a bit of green nearby in January. The fix is simple. Pair your summersweet with a few evergreens like inkberry holly or a low juniper planted close by. The evergreen holds the green for you all winter. Your summersweet still brings fragrant flowers in summer and yellow leaves in fall, so the bed never looks empty.
So plan for a shrub that changes hard with the seasons. You get sweet white flowers in summer, golden-yellow leaves in fall, and a frame of brown capsules through winter. Treat your summersweet as a four-season plant with one bare phase, not as a steady wall of green, and it will more than earn its spot in your yard.
Read the full article: Summersweet Shrub: Care and Growing Guide
