Lowes offers Hastings Home Walk-In Greenhouse 4.69-ft L x 4.69-ft W x 6.39-ft H Clear Pop-up Greenhouse for $65.45 (reg. $87.26) free shipping. 

Product Description:
The Walk-In Greenhouse by Hastings Home is an essential for any home gardener who want to enjoy an extended growing season. The 8 sturdy shelves provide plenty of room for seedlings, herbs and vegetables, fruit-bearing plants, or perennial flowers, as well as gardening supplies. Its clear PVC cover with a roll-up door helps create an ideal growing environment, protecting seedlings and sensitive plants from frost or cold snaps, strong winds, pests, and other elements.