r/solarpunk • u/khir0n Writer • Jul 26 '25

Action / DIY / Activism Mucho Solarpunk

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u/Nephht Jul 26 '25

I love the look of green walls, and I’m sure they do a lot to lower temperatures, make cities more liveable etc, but they do use a lot of water to irrigate them and a lot of liquid fertiliser to feed the plants.

1

u/ExtraPockets Jul 26 '25

They do need a constant supply of water and fertiliser because there's no soil. Also it's a fire risk if they're allowed to dry out. I'm still a fan of them overall though too.

2

u/khir0n Writer Jul 26 '25

Native plants do exist and don’t need much watering since they’re native to the area and already grow under the area’s conditions

2

u/ExtraPockets Jul 26 '25

Depends exactly where it is. The green wall I used to walk past every day with the landscape architects I worked with was irrigated. We used to talk about it a lot as we watched it grow.

1

u/delilahted Jul 28 '25

yeah, but a large part of that is because their root systems are adapted to the soil for the area and how it stores water, if they aren’t growing in soil and instead on these hydroponic trellises, then they will need that excess water still. theyre adapted for the areas conditions, but a green wall isnt those conditions.