Mainau Island Lake Constance

Mainau Island: A Garden Worth Planning Your Lake Constance Trip Around

Mainau is a 45-hectare island in Lake Constance, connected to the southern German shore by a footbridge, and managed since 1932 by the Bernadotte family (Swedish nobility, Scandinavian royalty by a circuitous route). The island was a hunting estate before they turned it into an elaborate garden, and the baroque palace at its centre still defines the layout.

The draw is the flowers. The island grows over 30,000 roses in the rose garden alone, has an Italian Water Staircase modelled on Villa Carlotta, a palm house, and a butterfly house with free-flying tropical species. The floral calendar runs from the first tulips and narcissi in March through dahlias and late roses in October. Each season has its headline feature, which the management communicates clearly on their website.

The most impressive single display is the Blumenteppich — a flower carpet made from thousands of freshly planted bedding plants in a geometric pattern, changed each year. It’s usually at its best from late April through May.

Getting There

Mainau is on the southern side of Lake Constance, reachable from Konstanz by bike (about 8km along a well-maintained lakeside path), by boat from Konstanz harbour (30 minutes, reasonably priced), or by car to the mainland entrance and then on foot over the pedestrian bridge. The boat approach is more pleasant.

From the railway perspective, Konstanz is the logical base. It’s a university town with a well-preserved medieval centre, reasonable accommodation options, and direct trains from Stuttgart (1.5 hours) and Zurich (45 minutes).

What to Expect

The island is genuinely beautiful but also genuinely popular — weekends from late April to June can be very crowded. Arrive when it opens (usually 9am) or come on a weekday morning if possible.

Admission is around €17–21 depending on season. The butterfly house costs extra. The restaurants and café on the island are somewhat overpriced, as you’d expect from a popular visitor attraction, but the Rose Garden terrace is pleasant for a coffee if you time it between the lunch rush.

Plan two to three hours minimum, longer if you want to sit in the gardens rather than just walk through them.

Lake Constance Beyond Mainau

The lake (Bodensee in German) is shared between Germany, Austria, and Switzerland. The cycle path that circumnavigates it — about 260km total — is one of the better multi-day cycling routes in Central Europe, well-signposted and mostly flat, with ferries crossing the width of the lake to break the journey.

The island of Reichenau, also on the German side of the lake and also a UNESCO World Heritage Site, has three Romanesque monastery churches from the 9th–11th centuries and is essentially the opposite of Mainau: quiet, agricultural, no crowds. It takes about 45 minutes to cycle across the island. The two make a good pairing if you’re in the area for multiple days.