Ask a Question forum: Depth of soil for elevated garden?

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Huatulco, Oaxaca, Mexico - hot
rbeels
Jun 17, 2017 9:12 AM CST
I will build an elevated organic garden on the north side of my home in Huatulco, Mexico. It will be 1 meter x 4 meters, with cement floor and side walls. I want to grow herbs, vegetables and flowers.
I am guessing that the soil depth should be about 18 inches over a layer of rocks on the cement floor. The garden will receive full sun during the Winter and mostly shade in the Summer.

Would 18 inches of soil be about right?
Should I run a sprinkler hose down the middle, or would a drip system be better?
Any tips would be appreciated.
Thanks very much, Robert
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Jun 17, 2017 1:03 PM CST
Welcome!

I would think 18 inches is the absolute minimum depth for your raised garden. Remember to put in drainage holes. Do not line the bottom with rocks - that will impede drainage.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

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Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Jun 18, 2017 12:36 PM CST
Being you said, Hot ! I would go 24 inches. Wood for sides. Cement will get hot, and make soil hot.
Drip system, best.
Bark or mulch on top to keep soil cool. Thumbs up
GARDEN HOEEE
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Anything i say, could be misrepresented, or wrong.
Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Jun 18, 2017 1:24 PM CST
oh !!! Robert !!! You will need, plenty of drain holes on bottom and good draining soil. I use one part potting soil or bedding soil to one part washed sand.

Also, I would use wood for bottom, so i could drill drain holes.
And like, Daisy said no rocks on bottom, thats not good .
😎😎😎
Anything i say, could be misrepresented, or wrong.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Jun 18, 2017 1:44 PM CST
Personally, I would make the sides concrete but not put a bottom in it. Then you wouldn't have to worry about height of the sides or drainage. Concrete is much more insulating than wood.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Webmaster: osnnv.org
Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Jun 19, 2017 6:45 PM CST
Rbeels: I am interpertating, that, you are talking about an elevated bed, a bed that the bottom, is above contact with the ground ?
I'm i right ???
Let me know.

Now ! For bed siding.
Put a cement paver, and a peice of wood, on the ground, in the hot sun for several hours. See, with, bare feet, which one gets hotter.
Then, decide, what you want to use for your garden bed siding.
😎😎😎

Anything i say, could be misrepresented, or wrong.

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