peter wrote:
Hi
I'm planning to build a few concrete block garden beds, probably
three blocks high, ten blocks long at the max, on a concrete floor.
What are the growing mediums better suited to this?
Is it a good idea to waterporoof/seal the inner surfaces?
Do you have to use mortar for a wall three bricks high?
Thanks all
Peter

What are you doing about drainage? I would think that mortar would be
needed or the whole thing will fall apart.

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Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8b
Sunset Zone 5