Andromeda plants like partial or dappled shade best, and that is your short answer to the andromeda sun or shade question. They will take full sun in cooler spots, but they thrive when you keep the harshest light of the day off their leaves. Get the light right for your plant and the rest of its care gets much easier on you.
I planted my Mountain Fire and it held a deep, glossy red on the new spring growth. A friend's plant a mile away looked washed out and tired by July. Mine sat on the partly shaded north-side woodland border of my zone 6 garden, tucked against a line of oaks. Hers baked in open lawn with sun on it from morning to dusk. I checked the soil under mine and it stayed damp far longer between rains, so the roots never dried out the way hers did. You can see the light and the moisture working together right there in the leaf color.
Here is why the spot matters so much for your plant. Andromeda grows broadleaf evergreen foliage, which means those wide leaves stay on the plant all year and get no chance to rest. In hot regions full sun bleaches and scorches that foliage, fading the green to a sickly yellow and burning the edges brown. Strong sun also dries your soil fast, and dry roots cannot keep the leaves cool. Shade does the opposite for you. It keeps the leaves cool and the moisture steady, so your plant holds its color and its shape through the season. If you garden where summers turn brutal, that cool, even moisture is what keeps the foliage from frying.
The andromeda light requirements are a bit flexible, which is what trips most people up. Full sun to partial shade both work on paper. But partial shade is the preferred choice in southern and hotter gardens, where open sun pushes the plant past what it can handle. Light also plays into pests, so you want to weigh that too. Lace bug pressure gets worse in full sun, and those tiny insects stipple the leaves with pale spots and weaken the whole shrub over time. Put your plant in too much sun and it fights heat stress and bugs at the same time, which is a hard combination to win.
Aim for morning sun and afternoon shade, or steady dappled light under high tree canopy. That mix gives the plant the energy it needs without the midday heat that fades the leaves.
So where should you actually plant it? Pick a spot with morning sun and afternoon shade, or the dappled woodland light you get under tall trees. The east side of your house works well, since it catches gentle early light and then stays shaded once the day heats up. This is the classic role of a partial shade shrub, and andromeda fills it well along a shaded border or under taller trees in your yard. If your only open spot bakes all afternoon, plant something else there and save the cooler corner for this shrub.
One more thing makes a real difference for you. Shelter your plant from cold, drying winds, especially in winter. Wind pulls moisture straight out of those evergreen leaves faster than the roots can replace it. The result is the same brown scorch you get from too much sun. Set your shrub near a fence, a wall, or a band of evergreens to block the worst of it. Give your andromeda cool light, steady moisture, and a break from the wind, and it will reward you with rich color season after season.
Read the full article: Andromeda Plant: Evergreen Care Guide
