Keeping track

[3rdragon]

How do you track what you have planted where, and what you want to plant where, and what you planted there last season?

As a kid I just did popsicle sticks with the name written on, but nowadays I have ambitions for crop rotation and record-keeping, and little sticks just aren't cutting it. We have a map, and a Google spreadsheet with when we planted stuff and how long it took to germinate*, but neither is an easy way to know if I should plant lettuce in this particular spot, or if kale would be a better choice this year.

---------
*I didn't make it -- a friend of mine gave me a copy of hers, and I just put stuff in boxes.