Potting Shed vs Greenhouse: Which to Buy
A greenhouse prioritises maximum light for high yields. A potting shed offers better insulation and storage for propagation. If you have limited space, the decision comes down to summer growing power versus year-round practicality.
Key takeaways
- Greenhouse: Best for heat-loving crops (tomatoes/peppers) and maximum summer yield.
- Potting Shed: Best for seed starting, propagation, and secure storage.
- Insulation: Potting sheds retain heat significantly better than glass greenhouses.
- Cost: Potting sheds are a larger investment but often include installation and flooring.
Installer's note
We fit both greenhouses and potting sheds every week. The customers who are happiest long-term are the ones who thought about what they actually do in the garden. If you spend most of your time sowing seeds and potting on, a potting shed is the better buy. If you grow rows of tomatoes and cucumbers all summer, stick with a greenhouse.
This guide compares the aluminium greenhouse against the wooden potting shed. We cover light, heat, storage, price, and comfort.
The core difference: light vs. insulation
A greenhouse brings in light from all sides. A potting shed combines a glazed growing area with solid walls for storage.
- Greenhouses give summer crops plenty of light and warmth. They are also useful for hardy winter crops. Tender plants may need extra frost protection in either building.
- Potting Sheds are a hybrid. They feature a large glass front and roof section angled to catch the sun. The solid timber back and side walls sacrifice some light for significantly better heat retention and security.
1. Growing performance: which yields more?
If your sole goal is to grow 50 tomato plants and maximise your yield, a greenhouse wins. The all-around light is unbeatable for summer crops.
However, a potting shed is often the better choice for propagation and early season growing.
Solid timber walls make a sheltered workspace, while the glazed front and roof bring light onto the staging. Keep a thermometer near tender plants during cold spells. A potting shed is useful for:
- Starting seeds in trays.
- Overwintering tender plants like Pelargoniums.
- Growing shade-tolerant crops or salad leaves.
Verdict: Greenhouse for yield; Potting Shed for propagation and season extension.
2. Storage: where do the tools go?
A potting shed gives you wall space for hooks and racks, with room to keep supplies out of sight. A greenhouse can also store pots and compost neatly beneath staging. Leave space for air to circulate and keep the aisle clear.
A potting shed offers:
- Integrated Staging: High-level shelves for seedlings and sturdy lower staging for heavy pots.
- Hidden Storage: The solid timber walls let you install hooks, racks, and shelves. Store your lawnmower, strimmer, and tools securely out of sight.
- Security: Mortise locks and solid wood doors come as standard on our range. A potting shed is far more secure than a glass greenhouse.
Good fit: A potting shed if storage and a working bench are high on your list.
3. Working comfort (the "cup of tea" factor)
A sheltered place to pot up plants is welcome on a wet afternoon. Both buildings get you out of the rain. The potting shed's solid walls give it more of a workshop feel.
Swallow potting sheds include a timber floor and a working bench. There is room to organise seed trays and keep favourite tools close by. A chair can make it a pleasant place for a break, too.
Comparison table
| Feature | Aluminium Greenhouse | Wooden Potting Shed |
|---|---|---|
| Light Transmission | Glazing on all sides | Glazed roof section and front |
| Heat Retention | Extra frost protection for tender crops | Good (Timber acts as insulation) |
| Storage Capacity | Under-staging space and shelves | Excellent (Wall space + floor) |
| Security | Contents visible through glazing | High (Solid walls + locks) |
| Maintenance | Low (Wipe glass clean) | Medium (Oiling timber every 3-5 years) |
| Price Point | £600 - £2,000 | £3,000 - £6,000+ |
The price reality
We believe in transparent pricing. A high-quality potting shed is a significant investment.
You can buy a standard 6x8 aluminium greenhouse for under £800. A ThermoWood potting shed of the same size costs over £3,000.
Why the difference?
- Materials: You are paying for premium, heat-treated timber. It resists rot for decades. Toughened safety glass is included.
- Floor: Potting sheds come with a sturdy timber floor. Greenhouses require you to lay a perimeter base or full paving.
- Installation: Our Swallow potting shed prices include professional installation. Aluminium greenhouses offer DIY assembly, with installation available on selected models. Choose whichever suits your time and confidence.
Which model fits your garden?
1. The compact choice: swallow jay (6ft wide)
View and buy Swallow Jay 6x6 Painted Wooden Potting Shed
Well suited to standard urban gardens or patios. The Jay fits a full-depth potting bench while leaving enough floor space for standing and storage.
- Sizes: 6x6 up to 6x20
- Best For: Propagation, small tool storage, and smaller gardens.
- Price: From £3,751 (includes install)
> View the full Swallow Jay range
2. The grower's choice: swallow rook (8ft wide)
View and buy Swallow Rook 8x8 Painted Wooden Potting Shed
The extra width allows for storage on both sides of the aisle. There is room for a comfortable chair and heater setup.
- Sizes: 8x6 up to 8x20
- Best For: Serious enthusiasts who want a "garden room" feel.
- Price: From £5,181 (includes install)
Swallow Jay 6x8: growing space and storage
|
Swallow Jay 6x8 Best for: Gardeners who want a potting shed that fits a standard UK garden Useful features: The 6x8 is the size we install most often. Full-length bench along the glazed front with room for tool hooks and shelving on the back wall. ThermoWood frame, toughened glass, auto vents, and installation all included. Price: From £3,751 View the Swallow Jay 6x8 |
Matt's tip: think five years ahead
Think about how you use the garden now. If growing crops is the main pleasure, give them the light and space of a greenhouse. If potting, propagation and storage share the space, a potting shed may suit you better.
Summary: which should you buy?
Buy an Aluminium Greenhouse if:
- Your main focus is growing summer crops like tomatoes, cucumbers, and peppers.
- You have a separate shed for your tools.
- You are on a tighter budget.
Buy a Potting Shed if:
- You need a dual-purpose building (growing + storage).
- You want a comfortable, warm workspace for spring and autumn.
- You want a permanent garden building that adds value to your property.
- You prefer the traditional aesthetic of timber over aluminium.
Ready to explore? Browse our full range of Swallow potting sheds. All include free UK installation.
Frequently asked questions
Is a potting shed warmer than a greenhouse?
Solid timber walls can help a potting shed retain warmth. Position, glazing and weather also affect the temperature inside. Use a thermometer when overwintering tender plants; either building may need extra frost protection.
Can I grow tomatoes in a potting shed?
You can, but a greenhouse gives better results for summer crops. Tomatoes need maximum light and heat. A potting shed has less glass, so light levels are lower. Use a potting shed for starting tomato seedlings, then move them to a greenhouse or sunny spot outdoors.
Do potting sheds need planning permission?
Many potting sheds qualify for permitted development in England. Within 2m of a boundary, the overall height must not exceed 2.5m. The distance is a height-rule trigger, not a minimum setback. Other conditions apply, and rules differ across the UK.
What is the difference between a potting shed and a garden shed?
A potting shed combines a glazed growing area with storage. Its glazing brings light onto staging for sowing and potting. A garden shed focuses on storage, although many have windows.
How long does a thermowood potting shed last?
ThermoWood frames last 30+ years with minimal maintenance. The timber is heat-treated at 215°C to remove moisture and sugars that cause rot. Swallow potting sheds carry a 12-year warranty on the frame. No annual preservative treatment is needed.
