Top 10 Best Mini Greenhouse Reviews in 2018 ————— 10. Best Choice 4-Tier Mini Greenhouse 9. Gardman R700 Heavy-Duty 5-Tier Greenhouse 8. Outsunny 01-0468 Portable Backyard Flower Garden Greenhouse 7. Gardman R691 4-Tier Steel Frame Greenhouse 6. Quictent Portable UV-Protected Greenhouse 5. Flower House X-Up Shelves Greenhouse 4. Quictent 3-Tier Walk-In Mini Greenhouse 3. Abba Patio Walk-In Mini Greenhouse with Large Door 2. Best Choice SKY1917 Tunnel Walk-In Green House 1. Palram Nature Series Mythos Solid Walk-In Mini Greenhouse