Woot offers Sunnydaze Outdoor Portable Mini Greenhouse Tent with 2 Zippered Side Doors and Iron Tube Frame - Clear - 4' x 3' for $21.99 (reg. $61.95) free shipping with Prime. 

Product Description:
This mini outdoor greenhouse provides a practical solution for extending the growing season and protecting delicate plants. Designed with a durable iron tube frame and a reinforced PVC cover, it offers strength and weather resistance while maintaining consistent humidity and warmth inside. Measuring 51" wide by 36.25" deep and 37.5" high, it fits comfortably in small outdoor spaces like patios, decks, and gardens. Two doors with zippered openings allow convenient access to plants for watering, trimming, and harvesting without disturbing the structure. The compact design supports the healthy growth of vegetables, herbs, and flowers by shielding them from harsh elements and pests. The roll-up flap can be secured in place for ventilation, helping regulate airflow and temperature as needed. Whether used to start seedlings, grow produce, or protect blooms from early frost, this greenhouse creates a controlled environment that promotes thriving plant life in any outdoor setting.