Short answer: dogs are welcome on a lead across the outdoor gardens and walkways, but not inside the Biomes themselves — the enclosed, climate-controlled environments simply aren't set up for it.
The extensive outdoor planting, the outdoor sculpture trail and the walkways between areas are genuinely dog-friendly, which given the size of the outdoor site still makes for a proper few hours out.
The Rainforest and Mediterranean Biomes are sealed, climate-controlled environments — the heat and humidity alone would be genuinely unpleasant for most dogs, quite apart from any policy reason.
Given your ticket lasts a full year, a genuinely sensible approach is splitting the visit — bring the dog for an outdoor-only day, then return without them another time to properly do the Biomes.
The outdoor site has genuine shade in parts but can get warm on a sunny day — bringing water for your dog is worth doing regardless of how short you think the visit will be.
Given the year-long ticket, a common approach is a dog-friendly outdoor visit early in the ticket's life, then a return trip without the dog specifically for the Biomes later in the year.
Beyond the planting itself, the outdoor sculpture trail gives a genuine extra reason to bring the dog along even on a Biomes-focused visit — worth building in time to walk it properly.
Worth knowing before you plan the wider trip, because the answer varies a lot between sites that look similar. Here's every major Cornish attraction we've checked:
| Attraction | Dogs? |
|---|---|
| Bodmin Jail | Yes — throughout, indoors included |
| Trebah Garden | Yes — whole garden and the beach |
| Glendurgan Garden | Yes — on a lead |
| Trelissick Garden | Yes — woodland and river garden |
| Lost Gardens of Heligan | Yes — most of the site, on a lead |
| Lanhydrock | Parkland yes — house no |
| Pendennis Castle | Grounds yes — indoor exhibits no |
| Eden Project (this page) | Outdoor gardens yes — Biomes no |
| Minack Theatre | Daytime gardens yes — check for shows |
| St Catherine's Castle | Yes — on a lead, free entry |
| Tate St Ives | Assistance dogs only |
| Maritime Museum | Assistance dogs only |
| St Michael's Mount | Assistance dogs only |
| Newquay Zoo | Assistance dogs only |
| Cornish Seal Sanctuary | Assistance dogs only |
| Paradise Park, Hayle | Assistance dogs only |
Policies can change — worth a quick check with the attraction if a dog-friendly visit is the whole reason for your trip.
See the full St Austell guide, filtered by who's with you.
Open the St Austell guide →