this post was submitted on 06 Apr 2026
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Scientists behind a project to turn human wee into plant fertiliser hope to grow their first forest.

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[–] boonhet@sopuli.xyz 5 points 14 hours ago (2 children)

Before you get any ideas, weeing in your garden in the hope it'll help the plants grow isn't the best plan.

"Urine does naturally contain all of the nutrients that plants need such as nitrogen, phosphorus and potassium, but it also contains a variety of contaminants," explained Olivia Wilson, NPK Recovery's research and development scientist.

Well what good is this then, I don't own a wee fertilizer production company. I do own a compost mound I could pour wee into, though.

[–] SaveTheTuaHawk@lemmy.ca 5 points 12 hours ago (1 children)

Urine has been a fertilizer for over 2000 years. The only trick is to dilute it. Romans learned that.

[–] boonhet@sopuli.xyz 2 points 11 hours ago (1 children)

Tbf I've usually heard of it being combined with ash.

Mostly I don't feel like collecting pee though lol

[–] rizzothesmall@sh.itjust.works 8 points 11 hours ago

You're always collecting wee. It's timely distribution that is the trick.

[–] LallyLuckFarm@beehaw.org 3 points 12 hours ago

I don't advocate use of urine for folks on persistent medications and the like, but otherwise the guidelines I use are pretty basic:

Direct use is fine for plants not being used for consumption, or for trees and shrubs where the food portion is off the ground and away from splash back. If they're where others can see you it might be better to use a container to be more discreet.

Anything else will get a helping of the homemade compost with homemade charcoal that's been used to sequester the nutrients (also homemade).

Iirc many of the contaminants will be salts which will get flushed with irrigation or precipitation, but folks can also just dilute urea with water 10:1 or more to reduce the likelihood of salt buildup in the soil