I should also mention that the Turkeysong blog ( http://turkeysong.wordpress.com ) is an excellent resource for lots of obscure and useful information, from growing potato onions to making slaked lime and biochar. Lots of interesting experimentation--highly recommended.
"I must Create a System, or be enslaved by another Man's"--William Blake
Just a quick note, the leaves are grass-like. Grass seems to out-compete it and shade it, reducing the vigor of the bulbs. If you mean to have weeded beds, it's easy to be pulling up the plants because they are almost invisible in a grassy area. I've gone to planters as a home gardener, and it works better for me.
Normally trees don't drive trucks. Does this tiny ad have a license?
Building a Better World in your Backyard by Paul Wheaton and Shawn Klassen-Koop