Yesker Mini Greenhouse 106"x36"x36" Portable Small Green House for Indoor Outdoor Greenhouses with PVC Cover Compact Greenhouse Kit for Winter Gardening Balcony Patio Outside Backyard Plant Protection

You could buy a greenhouse that is long and low, and then open one end and seal it into an open door. Something like this: https://a.co/d/09muyPkK A thin film will pass a good fraction of the UV, while a window is designed to block it.