After Year 1 of growing, most Irish gardeners face the same decision: invest in a polytunnel, or invest in raised beds? Both cost real money. Both massively change what you can grow. Here's the honest comparison.
Quick Answer
If you want tomatoes, peppers, chillies, aubergines, cucumbers or a longer season: polytunnel.
If you have heavy clay soil, poor drainage, or want a tidier visual garden: raised beds.
If you can only afford one and you live in a typical Irish suburban garden: raised beds first, polytunnel in Year 3.
Can You Put Raised Beds Inside a Polytunnel?
Yes. For many Irish growers, the best long-term setup is raised beds inside a polytunnel: the tunnel adds warmth and rain protection, while the beds solve drainage, define paths and make crop rotation easier. The trade-off is cost. A small tunnel plus timber beds and imported compost can easily become a €1,000-plus project.
If budget is tight, build outdoor raised beds first and leave enough space for a future tunnel. If you already have a sheltered, sunny plot and heavy soil, raised beds give the fastest improvement. If your main goal is tomatoes, cucumbers and earlier seedlings, the tunnel matters more.
Quick Decision Matrix for Ireland
| Your constraint | Build first | Why |
|---|---|---|
| Wet clay soil | Raised beds | Drainage is the limiting factor before warmth. |
| Windy west or exposed site | Raised beds | A cheap tunnel will suffer unless it is properly anchored. |
| Tomatoes and cucumbers are the priority | Polytunnel | Warmth and rain protection change the crop range. |
| Small rented plot | Raised beds | Lower commitment, easier to remove, less permission risk. |
| Established allotment with clear rules | Polytunnel | Best return once water, paths and boundaries are known. |
The Costs
| Polytunnel | Raised beds | |
|---|---|---|
| Entry-level cost (2026 Ireland) | €400–€900 (3m × 2m) | €80–€200 per bed (scaffold boards DIY) |
| Mid-range cost | €1,000–€2,500 (5m × 3m wind-rated) | €250–€500 per bed (sleepers or kit) |
| Plus required extras | Ground anchoring, crop bars, irrigation | Bagged compost to fill (~€60–€150 per bed) |
| Lifespan | 5–10 years cover; 15–20 years frame | 10+ years (sleepers), 3–5 years (scaffold board) |
What Each Enables
Polytunnel unlocks
- Tomatoes — the big one. Outdoors Irish tomatoes are a lottery; indoor they're reliable
- Peppers, chillies, aubergines — Mediterranean crops become genuinely possible
- Cucumbers — outdoor Irish cucumbers are slow; polytunnel they produce like crazy
- Extended season — harvest into November/December with hardier crops
- Earlier starts — begin seed-raising in February with warmth
Raised beds unlock
- Better drainage — particularly helpful in Ireland's wet climate and for heavy clay soil
- Warmer soil earlier in spring — you can plant 2–3 weeks sooner
- Back-friendly height — less kneeling, easier maintenance
- Visually tidy — defined beds look more cared-for than patchy ground
- Control over soil — fill with exactly the compost mix you want
Mistakes to Avoid
Do not buy the biggest tunnel before you know your site. In Ireland, wind exposure, anchoring and access to water matter more than catalogue size. A smaller wind-rated tunnel that you can manage every week is better than a large structure that overheats, dries out or lifts in a storm.
Do not fill raised beds entirely with cheap multipurpose compost. It shrinks, dries and loses structure. Mix compost with topsoil where possible, mulch yearly, and treat the bed as soil you improve over time rather than a container you refill from bags every spring.
Think About Your Situation
Heavy clay, wet site, existing outdoor crops fine
Raised beds first. They solve your single biggest constraint (drainage) and don't require a polytunnel-sized space commitment.
Good soil, sunny garden, want to grow more variety
Polytunnel first. Your existing ground is fine; what you're missing is warmth.
Tiny garden, zero space for a polytunnel
Raised beds only. A cold frame or small greenhouse can scratch the tomato itch without a polytunnel footprint.
Allotment (50–100m²) with standard soil
Polytunnel first — the space is fine, the payoff on summer crops is enormous, and most allotments allow polytunnels (check rules).
What to Buy in Ireland
Polytunnel: The Polytunnel Company is the specialist. Go wind-rated — Irish weather punishes cheap kits.
Raised beds: DIY from scaffold boards is cheapest (~€80 per bed). Sleepers (railway or new) look better but cost 3–5× more. Quickcrop sells kits if you prefer pre-made.
Work out what fits your space
Not sure which matches your garden? Talk to your Homegrown plot-share host or visit a community garden to see both in action.
See Community GardensSource and Review Note
Cost bands are indicative Irish retail ranges checked against common supplier categories in 2026. Site rules, wind exposure and material prices vary, so confirm dimensions, anchoring, water access and permission before buying. Last content review: 26 June 2026.