Businesses usually come to us wanting a greenwall for how it looks — a lobby feature, a compound wall, a privacy screen for a balcony — and that's a reasonable place to start. But the part that determines whether it still looks good in a year is the irrigation and drainage system built into the wall, not the plant selection.
A greenwall needs water delivered evenly across its full height and width, with drainage that doesn't pool at the base or leave the top rows dry. This has to be designed into the structure itself rather than added afterward — retrofitting irrigation into an already-installed greenwall is far harder than building it in from the start, which is why we treat the irrigation and drainage design as the primary engineering problem, not an accessory to the planting.
Plant selection still matters, particularly for indoor versus outdoor installations. Indoor greenwalls need species that tolerate lower light and consistent artificial conditions — pothos and philodendron varieties are common choices because they fill in quickly and forgive some inconsistency in watering. Outdoor greenwalls can use a wider palette but need to handle direct sun, wind exposure and temperature swings depending on orientation.
Maintenance is a genuinely different skill from flat-bed gardening — pruning, feeding and pest checks on a vertical surface need a crew trained specifically for it, and a wall that isn't checked regularly can decline faster than a comparable flat planting because there's less soil volume buffering against neglect.
For businesses evaluating green building certification, greenwalls can contribute toward biophilic design and landscape credits, which is worth raising with your design team early rather than after the wall is built. If you're weighing a greenwall against floor-standing plants for a lobby or feature space, it usually comes down to available floor space versus wall space — both work, but they solve slightly different problems.
