Can a hyacinth indoor plant be planted outdoors after blooming?
Certified GKH Gardening Expert
First you will want them to enter dormancy, then store for a couple of months. Then you can plant them. This article will help you in properly helping through dormancy: https://www.gardeningknowhow.com/ornamental/bulbs/hyacinth/curing-hyacinth-bulbs.htm
This article will help you on their care when you plant: https://www.gardeningknowhow.com/ornamental/bulbs/hyacinth/planting-and-care-of-hyacinths.htm