I'd go a lot deeper, those dahlia tubers can get good sized and if the
drainage isn't real good, they'll rot real good.

http://groups.yahoo.com/group/dahlia-net


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Dragons Must Fly when Thread's in the Sky

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"Jennifer" wrote in message
om...
I'm wondering if anyone has done this before and has had any
success.
I am setting up a dahlia garden 8 x 16 in a spot which used to have
grass. I am digging out the grass and going down about two feet.
In
order to retain water I was going to line the bottom with plastic,
cut
holes for drainage and then fill up the area with dirt. My two
concerns are, is 2 feet deep enough for a dahlia and even with holes
in the bottom do I run the risk of having the dahlia tubers rot?


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