Bulb plants

Question

How to take care of bulb plants that were supposed to be for outside but are not.

Answer 1

This article will help you with that:
https://www.gardeningknowhow.com/ornamental/bulbs/bgen/preparing-bulbs-for-winter-how-to-store-bulbs-for-winter.htm

But, just so you know, you can plant spring blooming bulbs up until the time the ground freezes. They don't mind at all.