I have seen tulips growing in water. Can they be started now? If so which type should I buy and how many for two 4 inch containers? How do I know if they have been chilled since they will not go through winter in the ground? Thanks for your reply. Linda Brice Barnowlpath@gmail.com
This is called "forcing" and then they are placed in water as a novelty. This is not a way to keep it growing, as they will not fare very well once they are forced. This is purely ornamental and temporary.
Here is an article that will help:
I live in South Jersey. We have had a mild winter but these are up to early what can I do to protect them
The foliage will survive freezes but if the flowers are budding and blooming during a freeze, you will lose those.
Watch the weather and if a freeze is anticipated, cover any budding or blooming plants. If they are blooming before a freeze, just cut them and bring them in to enjoy.