Bbq squiers and nail polish!
Best thing I've ever done to keep track, in addition to taking pictures is buy 100 packs of bamboo bbq squers then color code by swiping the top inch with various nail polishs. My tulips have been dormant for 8 weeks, and now theres inpatients and coleus in thier bed, but I know where every yellow pink , red tulip and hyacinth bulb lives to the inch because they are marked with colored stakes