Indoors, dust artificial green walls monthly with a microfiber cloth, feather duster or low-pressure air. Outdoors, rinse with a garden hose every two to three months and after dust storms or heavy pollen. For built-up grime, use warm water with a little dish soap and a soft brush. Never use solvents, bleach or a close-range pressure washer.
That is the whole system. Here is the detail behind each part.
Indoor walls: the monthly dust
Indoor foliage collects dust the same way shelving does, and dust is what makes an artificial wall start to look grey and lifeless. Once a month:
- Wipe accessible leaves with a dry microfiber cloth, working top to bottom so dust falls onto uncleaned sections.
- For dense panels, a feather duster or a hand vacuum with a soft brush attachment on low suction is faster than wiping leaf by leaf.
- Compressed air or a cool hair dryer on low works well for intricate foliage and hard-to-reach upper sections.
Outdoor walls and hedges: the quarterly rinse
Outdoors, rain does part of the job for you. Every two to three months, hose the wall down from top to bottom with a standard garden hose on a spray setting. Do it more often after pollen season, nearby construction dust, or coastal salt spray, which should not be left sitting on foliage between rinses.
Deep cleaning built-up grime
- Mix warm water with a small amount of mild dish soap in a bucket or garden sprayer.
- Apply to the foliage and let it sit for a couple of minutes.
- Agitate stubborn areas gently with a soft brush or sponge. Work with the direction of the leaves, not against it, so you are not levering leaves off their stems.
- Rinse thoroughly with clean water so no soap film dries on the leaves.
- Let the wall air dry. Do not towel-dry dense panels; it snags foliage.
Specific stains
- Bird droppings: soften with water first, then lift with a sponge. Dried droppings scraped off dry can pull color off the leaf surface.
- Grease and cooking film (common near outdoor kitchens and restaurant walls): warm soapy water handles it; repeat rather than scrubbing harder.
- Pollen: hose only. It rinses off completely if you do not rub it in first.
What never to use
- Solvents, acetone, spirits or citrus degreasers. These attack the plastic itself and cause permanent discoloration and brittleness.
- Bleach. Strips color unevenly.
- Pressure washers at close range. The jet tears leaves off stems and can shred foliage in seconds. If you must use one on a large commercial wall, keep it on the widest fan setting from at least 6 feet away.
- Stiff brushes or abrasive pads. They scratch the leaf surface, which then dulls and collects dirt faster.
After a deep clean on exposed sites: reapply UV protection
Washing removes grime, and on outdoor walls it also removes any surface UV treatment along with it. If your wall sits in strong direct sun, a deep clean is the natural moment to reapply a coat of UV protection spray once the foliage is fully dry. It is a top-up layer over the in-leaf protection, not a fix for foliage that has already faded.
Commercial spaces: build it into the cycle
For restaurants, hotels and offices, foliage cleaning belongs on the same schedule as light fittings and high dusting: a monthly front-of-house wipe-down and a quarterly deep clean keeps walls presentation-ready. Our commercial spec guide covers cleaning cycles alongside fire compliance and coverage math. It is also one of the quiet cost advantages over living walls, which need horticultural maintenance instead: see the true cost comparison.
When cleaning will not help
Cleaning restores foliage dulled by dust and grime. It cannot reverse UV fading, which is a change in the plastic itself. If a wall has bleached rather than dirtied, the fix is replacement panels in the affected zone, and choosing UV-stabilised foliage for the redo. Our guide on whether artificial plants fade in the sun explains how to tell the difference and what to buy for high-exposure sites.
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