Backyard Discovery Aggie Cedar Cold Frame Greenhouse Planter – Portable Mini Greenhouse with Auto Vent Polycarbonate Lid, Raised Garden Bed for Seed Starting & Year-Round Outdoor Gardening

Upgrade your year-round gardening setup with the Backyard Discovery cedar cold frame mini greenhouse, a smart and space-efficient solution designed to help seedlings, herbs, and delicate plants thrive in changing outdoor conditions. Built from naturally durable cedar wood that resists decay and moisture, this raised planter combines long-term outdoor performance with a clean, premium backyard look. The standout feature is the temperature-activated lid, which uses a heat-sensitive wax hinge to automatically open when temperatures rise above 70℉ and close as the air cools—no electricity, wiring, or daily monitoring required—helping protect plants from overheating while maintaining ideal growing warmth. The double-wall polycarbonate panels allow generous sunlight to reach your plants while retaining heat for improved germination and early growth, making it perfect for starting seeds earlier in spring and extending your growing season into colder months. Powder-coated steel legs and hardware provide extra structural strength and rust resistance, while the slatted base and mesh liner create excellent drainage to prevent root rot and promote healthier plant development. Its compact footprint makes it ideal for patios, decks, and smaller backyard spaces while still offering enough room to grow multiple plant varieties at once. With pre-cut, pre-drilled, and pre-stained components, assembly is straightforward even for beginner gardeners, and the included 5-year warranty adds peace of mind, making this cold frame greenhouse a reliable, low-maintenance investment for gardeners who want stronger seedlings, better seasonal protection, and consistent growing results.

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Category: Top Rated Planters & Garden Tools

Most Helpful Customer Showcase

“Solid, high quality planter! This is an extremely high quality product. The cedar is heavy and thick. This is a solid piece that will stand up to hot summers and freezing winters. I love that I’ll be able to start plants earlier in the spring, and keep them later in the fall because of the greenhouse lid- and be able to protect my plants from hungry deer!” – Amazon Customer (Source: Amazon)

“Wonderful Product. I’m so excited about this cold box! It is such a fantastic concept and I’m thrilled to be able to have to all my herbs protected and thriving longer! The box and liner are made so well that I’m sure it will survive even the heaviest storms. It was simple to put together too!” – Elizabeth Swanson (Source: Amazon)

“Wow, that was easy! We absolutely love our Backyard Discovery cold frame greenhouse box. The written instructions are simple to follow (3D instructions can also be viewed from scanning the QR code). Tip- leave plastic covers on items until ready to use. The part numbers are printed on the plastic covers. As a beginner, I am excited to grow vegetables and seeds earlier in the season to help our garden flourish. Backyard Discovery designs are well made and attractive. We decided to buy matching planters for our patio.” – Natalie Hoffman (Source: Amazon)

“Bravo!! Excited to use this next Spring! Like the pergola (that’s how we use it) we got from Backyard, this was very well designed. It’s easy to put together, directions are great and everything lines up perfectly, and it’s rock solid! Can’t wait to put this to use!” – Lynsey Curtis (Source: Amazon)

“A gardener’s dream greenhouse! This greenhouse is made from 100% cedar and is extremely durable. I live in the Chicagoland area and year after year it still looks brand new. My herbs have thrived in this greenhouse with the temperature activated hinges that really work and the excellent drainage! It was easy for me to assemble and a beautiful piece to add to any garden. I highly recommend this portable greenhouse!” – Patsy Buckberg (Source: Amazon)

“HIgh Quality Product…Worth the Money This cold frame is a fantastic addition to our backyard garden. It’s a high-quality product that’s built to last for years. The clear instructions made assembly quick and easy, allowing two people to put it together in under three hours.” – Christine O’Neil (Source: Amazon)