torres.grant•21d agoProlific Poster

Ran across a stat about how much water trees pull from the ground every day and it blew my mind

I was looking up something about root systems after a job last week, just trying to figure out why a maple was sagging near a driveway. I stumbled on this fact online that said a mature oak can pull 40 to 50 gallons of water out of the soil in a single day. I had no idea it was that high, like I knew trees drank a lot but that number stopped me cold. It made me think about all the times I've seen people water their lawns like crazy right next to big trees, just wasting water since the tree is already sucking it all up anyway. I started noticing how compacted and dry the ground gets around those oaks compared to open spots on the same property. Has anyone else looked into how much water certain trees actually use, or got surprised by a random number like that?

3 comments

3 Comments

nora_park21d ago

Wait, 50 gallons for one tree? That's insane. Is that just for oaks or do other big trees like maples or pines drink that much too?

-2

phoenix_grant3420d ago

And @matthewmartin nailed it, maples are brutal near houses.

matthewmartin21d ago

You said "wait, 50 gallons for one tree?" and honestly that's the thing most people miss - it's not just about the tree drinking it but what happens to all that water underground. A big oak's roots can spread out way past its branches, like 50 feet or more in every direction, and they're basically pulling moisture from a huge area. Maples are actually crazier because they're thirsty year-round, not just in summer... pines are a bit different since they're built for drier soil and store water in their needles, but even a mature pin oak can suck up 40 gallons on a hot July day. What nobody talks about is how that water changes the ground around it, making it impossible for grass to grow close by or causing foundation issues if the tree is too near a house.