Cerdanyola del Vallès will host a bonsai exhibition on 2 and 3 May, an event included in the city's annual Roser de Maig festival. The exhibition is organised by Amics del Bonsai de Cerdanyola with support from the Cerdanyola del Vallès City Council.

This year's exhibition will take place at the Sant Martí School gymnasium, located at Avinguda Sant Iscle, 1-3. Visitors can attend on Saturday, 2 May, from 10am to 2pm and from 5pm to 8pm. On Sunday, 3 May, the exhibition will be open from 10am to 2pm.

The bonsai display is one of many activities planned for the Roser de Maig 2026 festival. Other events include an art fair, a children's photography workshop, a Modernist Fair, and an amusement park. The festival also features open days at the Ca n'Oliver Museum and Iberian Village, alongside the main Roser de Maig Festival.