Q.My Voodoo Lily Bulb Was Stored In A Box In My Garage For The Winter.When Should I Plant It?
I live in Ohio -it could still freeze. BUlb started growing and is now 43″ tall. I could plant it in my largest planter, and yes, I know it smells, but after the flower does the whole stalk die back, and then it can be planted in the ground? Bulb is about 6″ wide. I have dug this up yearly and I never know what I am doing.

Certified GKH Gardening Expert
You can plant once the soil reamins above 60 degrees. In your area, the whole plant will die back each year and will need to be wintered indoors.
Here is an article that will help you with their care: https://www.gardeningknowhow.com/houseplants/voodoo-lily/voodoo-lily-information.htm