I've just been reminded about it though, and have found a couple of resource pages with instructions on how to start a Bike Garden!
Step 1: Starting seed sprouts on your bike frame
- Cheese Cloth
- Sprouting Seeds
- Safety Pins
- A bike
Step 2: Making a bike basket planter
- A bike with a front basket on it
- Lots (20-ish) of large safety pins
- 4+ twist ties
- Plants or Seeds
The great thing is, you can invite people to help themselves to free edibles or flowers when you leave your bike parked. This could also be a good way to do some guerrilla gardening when you're out and about...transfer a flower here and there, and keep growing more.