At this point, take them out of the sun, stop watering them until the leaves start to turn yellow, cut off the foliage, knock the dirt off of the bulbs (you are trying to dry out the bulb a bit) and put the bare bulb in a well ventilated space, someplace dark and dry, that stays around 50 degrees for at least 8 weeks. Repot them, water, put back on the windowsill and see if they bloom again. You are forcing the bulb to go through "winter" then "spring" again. The buds formed at the basal plate this summer, the trick is to tell the bulb that its spring again, and the buds will appear when the bulb breaks dormancy again. This doesn't always work the first year. Commercially grown bulbs have been specially forced to bloom the first year in your home. The bulb may be so depleted afterwards, that it can take an extra year or so for the bulb to build up its reserves so it can make the new buds. You can also treat these bulbs as houseplants, keep them growing all winter on your windowsills. Sometimes they will put up bloom scapes in the late spring on their own. Your choice is to try to force them into an artificial dormancy or let them cycle on their own. The expert on forcing indoors is Margaret, mcash70 she lives in zone 3a. She's been very successful in reblooming bulbs. Send her a private message for more specific directions and tips.
