Are you looking for spring or summer flowering bulbs? Some spring flowering bulbs that come to mind are chionodoxia, scilla siberica, grape hyacinth, pushkinia, crocus. These are all small but very pretty. Botanical tulips are also quite attractive and very different from regular tulips in that they are small and very hardy. My favorite is tulip tarda.

I agree with what Eimer and irisgal said. Either extreme cold or freeze/thaw cycles will damage bulbs in something as small as window boxes. I haven't managed to be successful with something like a large whiskey barrel even, but I have been successful at planting in smaller pots that will be kept cold, but just above freezing. I think you can get window box liners so that you can have evergreens in the boxes for winter and then just pop them out and drop in the new boxes with the bulbs. If you have a couple bunches of window boxes with different varieties that bloom early and late, you can even have a succession of different bulbs in the boxes. Pansies also are great for spring window boxes since they tolerate frost well.

Bingo! Thank you so much! I googled them, and of course some sites said they only grew to zone 8 warmest - HA! We are zone 9 heading lately towards zone 10 - I never pay attention to the top heat zone for plants, unless it is below 8. Jackie

beautiful rose. I have not grown Blaze or improved based on reports of it not being hardy in our zone. I'm not convinced though, I am no expert and would trust roseseek. What about Dublin Bay? Do you remember if it was fragrant? I have heard that some roses wont repeat if not in enough sun.