concrete raised beds
Newby to the forum here, hopefully someone can help me... I have just bought a new house with a nice courtyard garden. It is about 80% sandstone paving, with a strip of gravel on the back edge, hemmed in by brick walls on two sides and a fence on the third. I would like to turn the strip of gravel into a contemporary raised bed, to plant some bamboo and an dwarf acer. I want the bed to be one of those white rendered affairs that are common in swanky roof gardens etc, dont judge me....
After research, the method i am going to take is:
Get rid of gravel, dig down and fill with compacted hardcore.
Mark out shape of raised bed and hammer in a rectangle of rebar, and wrap with some reinforcment meshing.
Build the shape of the raised bed in plywood forms, up against the paving, but leaving a couple of inches gap against the walls and fence.
Fill the lot with concrete, leaving the bottom part of the raised bed for drainage (so i have essentially build four walls in a rectangle shape).
Once dry, take off the forms and paint it with some kind of thick white waterproof paint to give a nice finish.
I am also wanting to install a waterfeature like a water blade to trickle down into a part of it, i think i will build the structure for this out of plywood and paint it with the same thich waterproof paint so it looks like it is part of the concrete.
My questions are, will this work? Have i missed anything? Does anyone have a suggestion on the waterproof paint which will also blend in the concrete to the plywood water feature?