THE
GREENHOUSE
Experts on how to help your hot-house plants thrive.
BY ROSIE WOLF WILLIAMS
G
reenhouses are no longer solely for use by botanical gardens or commercial nurseries. They come in all sizes and shapes to fit the requirements of passionate home gardeners – and they come with myriad benefits. A greenhouse can extend the growing season in colder climates, offer a humid environment for growing plants and prevent wildlife and insects from damaging fragile seedlings. No matter the size or type of greenhouse you choose, the key is to find the best possible location for optimal plant growth, and to set up the inside to fit your needs.
guide
Pick the perfect place
“ The greenhouse should be located on a level surface slightly elevated from surrounding ground surface,” says Randall Britton, Executive Vice President of Yardistry Structures, a Costco supplier.“ It is imperative to position it in an area that is protected from harsh winds and frost pockets.” Choose a spot that gets plenty of sun, ideally with a north or north-east aspect, Britton says. Face the longest side of the greenhouse to the sun to maximise exposure. Depending on what you want to grow, afternoon shade may also be good.
Assess your needs
Once you have a plan in place, think about the cost and the available space. Decide on a water source and if you’ ll need to have access to power. Buy the biggest greenhouse you can afford and fit into your yard. Even a small greenhouse can help you start seedlings, protect delicate plants and store equipment.
“ Generally twin-wall polycarbonate – the thicker, the better – is a much better protector of plants,” says Andrew Cook, Vice President of Sales and Marketing at Exaco Trading, a Costco supplier.“ Higher level glass greenhouses have in recent years become the product of choice as an alternative backyard pavilion – to be used as a personal space.”
Other considerations
If you are building the greenhouse from the ground up, build the frame before
30 | MAY / JUNE 2025 COSTCO CONNECTION