This is for when things start greening up.
Bears fresh from the den usually head for the alder bottoms and eat some skunk cabbage. It gives them the runs and lets them pass their hair/mucous plug from hibernation. From there they eat new grass for a few days until their system gets normal. Then they go looking for more substantial food.
Knowing that, take a 2lb bag of grass seed and put in a five gallon bucket with a gallon of water and put is some place warm, like next to the water heater. In a couple of days the seeds will begin to germinate and stink like composting grass clippings. It's best to have a lid for the bucket and to do this no more than 4 days before you plan to put this at your bait.
It really stinks but it draws bears.