Living Wall Coverage Rate
Coverage rate is the percent of surface covered by vegetation. Our stewardship team scores each living wall’s coverage rate on each visit. This page illustrates and describes coverage rates to clarify terms and set expectations.
Vegetative Cover Diagrams
Vegetative coverage is typically “measured” using the naked eye, but this requires a trained eye. The diagrams below illustrate the optical illusions between coverage that is evenly and randomly distributed, versus coverage that is un-evenly and randomly distributed. Although vegetative coverage is measured in plan view (looking straight down on the green roof), most people experience the green roof in perspective, which further complicates accurate coverage scoring. In perspective, taller plants may appear to provide more coverage than they do, and shorter plants may appear to provide less coverage than reality.
95-100% Vegetative Coverage
Mature living walls in good condition should have a coverage rate of approximately 95%. Our BioWall system is typically delivered pre-grown, with approximately 85-95% coverage immediately, depending upon grow-out time and species selection. With adequate light, a BioWall should reach 95% coverage within a 4-8 weeks of installation.
95-100% BioWall Vegetative Coverage: A mature BioWall flourishing in a sunlit atrium!
95-100% BioWall Vegetative Coverage: A BioWall several months after planting.
95-100% BioWall Vegetative Coverage: A small BioWall several months after planting.
95% BioWall Vegetative Coverage: A newly installed BioWall. Coverage is good on day one, but the plants are still small.
Living Wall Vegetative Coverage: 90-95%
An evenly distributed living wall coverage rate of 90-95% is good. As the plants in these walls are living, they require room to breathe and grow, and the best solution to minor open spaces is often to encourage the plants to grow, rather than to overcrowd them. A healthy, well lit living wall with 90% coverage should only be about 4-6 weeks of growth away from 95% coverage.
90-95% Living Wall Vegetative Coverage: An area of a BioWall just after planting. The gaps in coverage should fill in within 4 weeks +/-.
90-95% Living Wall Vegetative Coverage: A newly installed BioWall. The large Philodendron ‘Rojo Congo’ at bottom left have a few gaps around them, as these very large plants need space to grow. These gaps are usually not noticable after a month or two.
90-95% Living Wall Vegetative Coverage: A newly installed BioWall with a few areas that just require some plugs.
Living Wall Vegetative Coverage: 80-90%
The lowest coverage rate category we show for living walls is 80-90%, as initial planting should reach 80% coverage or higher. Some space between plants is necessary to allow plants to grow, but initial foliage gaps should be filled with foliage within 4-8 weeks of planting. However, very low light areas can be difficult to fully cover until light levels are increased.
80-90% Living Wall Vegetative Coverage: This BioWall is the same as is shown at the top of the page, only just after planting. This BioWall was planted in place, versus pre-grown, and is approximately 85% covered in this photo. This BioWall achieved 95% coverage approximately 4-6 weeks after this photo.
80-90% Living Wall Vegetative Coverage: In this BioWall, coverage is spotty around the recently planted Agloenemas. These gaps should close up approximately 4 weeks after planting.
80-90% Living Wall Vegetative Coverage: This BioWall was planted in place, versus pre-grown, and is approximately 85% covered in this photo just after installation.