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Senior Member
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Joined: Mon Jan 02, 2012 11:07 pm
Location: Austin, TX

raised bed around tree

I've heard that its back for a tree's root system to have dirt/mulch piled up around it. What do you thing? I want to utilize space without being an eyesore so I thought about building a 4x4 raised bed around my tree in backyard. Our dirt is too hard to dig.
Austin, TX Zone 8b

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Super Green Thumb
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Joined: Sun Feb 15, 2009 11:04 pm
Location: TN/GA 7b

I don't think the dirt/mulch should hurt the tree as long as:

it is organic and breathable (don't lay down plastic or anything that is going to block air and water passage)

it is well away from the trunk of the tree. You don't want mulch or dirt piled up against your tree trunk, where it will tend to rot the trunk out and encourage insect pests.
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Super Green Thumb
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Joined: Mon Jan 19, 2009 3:20 am
Location: Northern Utah Zone 5

The tree will compete fiercely with other plants for sunshine, water and nutrients. You may get some flowers to do OK, but it won't be a prime situation for veggie plants.
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-

Greener Thumb
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Joined: Sun Apr 04, 2010 7:29 pm
Location: Central PA

and if the tree is big on surface / shallow root feeding, any significant depth can kill the tree.

I see that in new developments all the time - people pay big extra bucks because the lot has 'mature trees' - five, ten yrs later they're paying big bucks to have the dead trees removed before they fall on the house.

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