Pot them up right away. If the bulbs are on the small size, you should be able to get 3 in a standard nursery gallon. Plant them deep enough so that all the green sprout is covered but handle very carefully..........if you break or damage that sprout, your lilies will not bloom this season. Make sure the potting soil is just moist to the touch (do not overwater!) and store them somewhere cool and dry.....the garage? Once they grow enough so that they are now showing above the soil surface and your ground soil is workable, you can plant them out into the garden. You can also grow them on in the container if you prefer but they will need daylight once the sprouts have emerged above the soil line. Protect from overly cold spells in spring if you go this route.

Just a word of warning - don't expect much from these bulbs initially. Dollar store lily bulbs are not of high quality to begin with and the presence of new growth indicates they haven't been stored properly. Typically this combination of conditions results in straggly growth and often no flowers during the first season. But go ahead and plant anyway. If the bulbs survive, they will grow bigger and stronger each year.

This link from one of the large lily bulb growers in my area outlines some of the concerns about buying/planting sprouted bulbs. btw, purchasing higher quality, fully dormant bulbs at the proper time of year from reputable vendors - like B&D Lilies - will be much more rewarding and generate much better plants and flowers than purchasing lower grade bulbs from mass marketers like the dollar or big box stores.

Thanks for the reply. I have pots of soil in the garage that I can stick them in, so hopefully they'll be happy to hang out in there until spring. They won't mind being planted out in chilly soil?

I don't expect much of them this year, but I'll give them a little extra attention and see if they can pull through and get over whatever abuse they've had. If they bloom true to color on the package, they'll be quite pretty. Not holding my breath on that being accurate, though!

I planted a few dollar store bulbs last year and this bloomed today. I think it is a sego lily variety but not sure. A lovely surprise!

OGT - your plant is Tigridia pavonia. It isn't in the genus Lilium so not a lily.