I'm not too sure if they don't require quite warm soil, to really take off once again, and I've always waited til my indoor temperatures are warmer, or it's warm enough to move the containers outdoors, and they will get leggy and lanky unless you have lots of bright light during those short winter daylight periods, especially if you're getting lots of cloudy days. I've never had problems getting mine to grow once again, though in general I think they prefer not ever going dormant except during warm dry periods perhaps. I've notice mine could have the tops frozen to the ground and on bringing them indoors for storage, they promptly started growing again , without even repotting them , which suggests to me, they don't have a natural dormancy period. There are other species that do die back naturally every fall for me outdoors once the cool weather arrives however, and those would be the pinks and other "colored" types, though those have more bulb like bulbs, and not the elongated rhizomes like the white ones? Not sure which kind you have?

Hi, thank. Yea, mine are the pink flowered kind. It just up and died back in October, and was starting to die back since early September. Should I keep the bulbs in soil, or is it ok to keep them out of the pot during this period? Thanks.

I would stop watering them and take them out of the soil. Check to see if the bulbs are rotted, it sounds like they might me from your description. Keep them out of the soil until you start to see green sprouts, and it is warm in your area. Then replant.

THanks!!!! I appreciate your help! I have them in wrapped in a dry paper towel for about 2 weeks now, I was afraid that would kill them. The rot was only on the surface and Thank God, did not go in deep. I will check on them tonight.
I was trying to grow them next to my cold window. Where are my brains!! Hehe.

Here is a link that might be useful:

My pink ones were the "miniature" pink Rehmanii ones grown form seeds and I did sometimes leave them in the pot , just very dry for storage, thuogh in a cool not overly dry spot , they don't require any packing material to store them, since they seem not to get overly dry even after months of storage, unlike certain other types of tender bulbs, which can get overly dry in storage. Those were dependable bloomers for me , going dormant in late fall, stored and replanted right in the ground in late spring here. The giant whites , which have a different bulb, are another story, and I should pitch them about now, since they've almost never reflowered in years of growing them for some reason. I was informed those are very heavy feeders, so perhaps I just haven't fed them enough for them to reflower?

Are the white ones semi-aquatic?