Best Garden Dome for Plants and Growing
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Quick answer
For most growing setups, our pick is the Ultra specification. Choose Extreme if you prefer our premium 3 mm panels, including at exposed or coastal sites. Choose the size to fit your staging and seating. Clear, UV-protected panels give abundant all-round light, and you get a comfortable room to tend and enjoy your plants in, tougher than greenhouse glass, with an orangery feel without the orangery price. Ventilate well in summer and use a heater to keep frost off in winter.
Why plants love a dome (and so will you)
If you love plants but want somewhere lovelier than a greenhouse to enjoy them, a dome is a revelation.
- Light from every angle. A dome's solid, clear, UV-protected panels flood the space with daylight from all sides, not just overhead, which suits healthy, even plant growth. Sun-loving plants thrive.
- A room, not just a greenhouse. Unlike a greenhouse you'd never linger in, a dome is a comfortable, weatherproof space to actually be among your plants: potting, pruning, or just sitting with a coffee surrounded by greenery.
- Toughness. As a material, polycarbonate is around 250 times more impact resistant than glass and flexes rather than shatters, so a stray ball or wind-blown debris won't leave cracked panes and shards among your plants.
- Year-round. Solid polycarbonate keeps the wind and rain out, so you can grow and relax in it through every season, where a flimsy structure would struggle.
Choosing your growing dome
- Size to your ambitions. A few statement plants and a seating nook need less than a serious propagating and display setup. Allow room for staging, pots and yourself: the Mini gives you 5.7 m² of floor, the Standard 9.6 m² and the Large 19.6 m².
- Specification. Ultra suits most growing setups: its panels are 30% thicker than Original, with stainless steel bolts, nuts and anchors, and it's our pick for most gardens, including windy ones. Extreme is our premium 3 mm specification for growing spaces where you want our strongest panels, including exposed, coastal or high sites. Original suits a sheltered garden and simpler growing. The Large comes in one specification, with maximum-thickness panels.
- Ventilation is your friend. Plants and people both benefit from airflow; the roof vents, windows and door included with every dome let you manage heat and humidity for healthy growth (and fewer problems such as mould).
Setting it up for growing
- Staging and display. Tiered staging, shelves and plant stands arranged around the curved shape make the most of the light and keep the centre open.
- Floor that copes with water. A durable, water-friendly floor, such as paving or outdoor vinyl over a level base, handles watering and spills easily (see our flooring guide).
- Manage heat and humidity. Open the vents and windows, and fit sunshade privacy panels where the sun hits, to prevent overheating in summer. In winter, a heater keeps frost off: a thermostatic electric heater on a supply installed by a registered electrician is the simplest choice, kept well clear of the panels and foliage, and any fuel-burning heater needs ventilation and a carbon monoxide alarm. Balance airflow to control humidity and condensation (see our ventilation guide).
- Mix plants and comfort. A chair or two among the greenery turns it from a working glasshouse into a sanctuary, which is the whole point of a dome over a greenhouse.
Greenhouse, dome or polytunnel?
Quick steer: for large-scale, dedicated crop growing on a budget, a greenhouse or polytunnel covers more ground for less money (see our comparisons of a dome vs a greenhouse and a dome vs a polytunnel). For a beautiful, durable, year-round space to grow, display and enjoy plants, an indoor garden you love being in, a dome is in a different league. If you want pleasure as well as productivity, choose the dome.
Frequently asked questions
Is a garden dome good for growing plants?
Yes. The all-round natural light keeps plants thriving, and you get a comfortable, weatherproof room to tend and enjoy them in, like an orangery for a fraction of the cost. It's tougher than greenhouse glass too.
Is a dome better than a greenhouse for plants?
For a space you grow and relax in, yes: it's bright, durable, usable year-round and lovely to be in. For large-scale dedicated crop growing on a budget, a greenhouse or polytunnel covers more ground for less money.
Will plants get enough light in a dome?
Yes. Clear, UV-protected panels all round give abundant light from every angle, which suits even, healthy growth.
How do I stop a growing dome overheating?
Open the roof vents, windows and door for airflow, and fit sunshade privacy panels where the sun hits on hot days. Good ventilation also manages humidity for healthier plants.
Which specification suits an indoor garden?
Ultra for most setups, including windy gardens; Extreme for our premium 3 mm panels, including at exposed, coastal or high sites; and Original for a sheltered garden and simpler growing. The Large comes in one specification.
Sources: polycarbonate material data from A&C Plastics, Piedmont Plastics and KASTLITE.