Over the past couple of years, a large number of people have introduced ranges of small greenhouses. Most of these are lean to units to place against a wall, but others are freestanding.
One of the most popular products is the Forest Garden Victorian greenhouse. This is a lean to unit with timber structure including roof vents for good air flow and internal shelving. This arrives in treated timber, that do not require painting, but looks impressive when painted. With a footprint of just 147cm x 74cm, this is not taking a large floor area and is ideal for smaller gardens, or for someone who wants to try GYO without a large financial investment.