I'm interested in building some inexpensive planters for our driveway. I want them to be about 12' long, 2' wide and 2' tall, with open bottoms for drainage. They don't HAVE to be square but that's probably the easiest shape to work with?
Windsor stone is too expensive and doesn't make square planters without a lot of extra work breaking stones in half.
Someone in another group suggested hypertufa ( a combination of concrete, peat moss and sand or perlite ) but that looks like a hell of a lot of work to make them that way. You have to build molds etc and for this size the molds might cost a lot too.
I thought of making them with 8x8x16 concrete blocks which are a whole lot less expensive but they'd be pretty ugly that way, wouldn't they?
So have any of you solved this kind of problem? How can I make my planters inexpensively and with as little work as possible? ( I have too many other things to do! )