Plant in whatever you've got
Because you are starting your garden for this year, aren't you?
Casaubon's Book (a wonderful blog which everyone should read) has a post up today called Growing In Sacks, Pots and Whatever You've Got. I also want to recall the post I put up last year*, Plotting the Urban Window Garden, which contains links to more ways to make pots and planters out of whatever's on hand. And as I mentioned in response to lambert here, I've also made lovely planters out of olive oil and other tins. I just recently saw a plant in a Planter's Peanuts tin, and it was so cute and meta that it made me want to search the recycling containers for some!
* Last year's window garden was scaled back a lot after that post, since I became injured and unable to tend to my seedlings at a crucial period. It made me very aware of how vulnerable a person living on their own is, and how vulnerable a garden tended by only one person is. There's a moral there, I'm sure.