The size of your greenhouse will naturally depend on the size of your garden, but also on how you intend to use it. “We’d put a 3 x 2.6 model in a small urban garden, as it gives you enough space to potter about, and you won’t grow out of it too quickly,” she says. “Some clients want to be able to host a dinner party in their greenhouse, in which case you really need a lot of room – enough for a table, plus some space to grow things.”

When it came to the aesthetic, Pollyanna says, “I knew I didn’t want a typical working greenhouse. I wanted it to be beautiful as well.” She opted for a deep bronze-coloured aluminium frame that blends into the surrounding greenery in her garden, with a wainscot (panelled) base. “I wanted a traditional-style greenhouse, but with a more contemporary base, because a brick base might have jarred with the black tongue-and-groove cladding of my garden studio,” she says. A panelled base is also quicker and easier to install than a brick one.

The specs

Pollyanna wanted to be able to grow tomatoes in the ground inside the greenhouse, rather than in grow bags, so she has combined a limestone floor with an in-ground planting area on one side, leaving plenty of space elsewhere for shelving and a gravel bench.

She has a potting shoe – essentially a tray with a tall back which can be filled with compost, acting as a potting bench – which is serviced by her favourite feature, the water pump, which draws water from a reservoir which collects the rainwater that drains down from the roof of the greenhouse when it rains. “I wouldn’t be without that: it’s amazing how much I use it and obviously the rainwater is a lot better for the plants [than tapwater],” she says.

There is a shade for the days when the sun is too intense, and the greenhouse is also fitted with a self-opening window, which works by way of a Bayliss piston – a cylinder fitted to the roof, filled with a cylinder of wax which expands as the temperature rises, activating a piston that opens the window. “I’m completely obsessed with it,” says Pollyanna, “it creates a chimney effect, allowing the air to move around.”

She has a power source so that she can add heat in winter. “I don’t have lighting, though,” she adds. “I ummed and ahhed about that but I didn’t think I’d be out here in the evenings. Little did I know.”