The 4 Tier Portable Greenhouse protects plants and seedlings from elements of weather and climate.The main shelves use high quality metal with powder coated, heavy-duty bearing net on each layer is strong enough to hold more seed trays, pots and plants growth light. Greenhouses are lightweight yet sturdy enough to ensure long-lasting use. Ideal for starting seedlings, protecting young plants or to get a head start or extend the plant growing season. Enjoy fresh, healthy flowers and vegetables all year round.