page_title: Green wall
section_title: Plants
hierarchical_section_title: Green wall / Plants
caption_attribution_description: English: Green wall of live vegetation on Blusson Hall, Simon Fraser University, Burnaby, British Columbia, Canada.
context_page_description: A green wall is a vertical greening typology, where a vertical built structure is intentionally covered by vegetation. Green walls include a vertically applied growth medium such as soil, substitute substrate, or hydroculture felt; as well as an integrated hydration and fertigation delivery system. They are also referred to as living walls or vertical gardens, and widely associated with the delivery of many beneficial ecosystem services.
  Green walls differ from the more established vertical greening typology of 'green facades' as they have the growth medium supported on the vertical face of the host wall, while green facades have the growth medium only at the base. Green facades typically support climbing plants that climb up the vertical face of the host wall, while green walls can accommodate a variety of plant species. Green walls may be implanted indoors or outdoors; as freestanding installations or attached to existing host walls; and applied in a variety of sizes.
context_section_description: Plants need to be close together in order to look good. The right plants need to be chosen for the right places because the ones with disease can contaminate others surrounding it. In order to have a wall growing all year round, 95 percent of the plants need to be evergreen. Perennials are best for seasonal green walls. It is necessary to choose plants that can withstand disease since replacement is costly. There are specific plants best suited in different environments. Different plants for shade, sun, windy, and a combination will need to be considered for longer a lifespan. The lifespan of plants will need to be considered when assessing long term green walls. Regular maintenance, the right places, and the right plants are needed to sustain a living wall. Pruning dead plants and weeds will keep the wall healthy and gaps need to be filled.
caption: Green wall the Simon Fraser University, Burnaby, British Columbia, Canada.
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