The Botanical Garden of Siena, or Orto Botanico dell’Università di Siena, is a terraced green space tucked inside the medieval city walls. Its paths descend a hillside past plant collections, ponds and glasshouses, with glimpses of terracotta rooftops and the countryside beyond. It is a quiet contrast to the busy lanes around Piazza del Campo and the Duomo.
Run by the University of Siena, the garden is part of a long tradition of botanical teaching and research. Early botanical gardens helped medical students identify useful plants, and Siena’s collections still reflect that heritage alongside a wider interest in plant diversity. The approach is named for Pier Andrea Mattioli, the Sienese Renaissance physician and botanist whose writings on herbal medicine circulated across Europe.
The garden rewards a slow wander rather than a checklist approach. Look for Tuscan and Mediterranean species, medicinal and aromatic herbs, ferns and plants adapted to drier climates. Shaded paths and the scent of herbs offer a different perspective on Siena, particularly after a morning spent in churches and museums.
Spring brings flowers to the beds, while early autumn offers gentler temperatures; in high summer, visit in the morning. The garden is roughly a 15-minute walk from Piazza del Campo, but allow for an uphill return and wear comfortable shoes. Check current opening times before setting out, and note that sloping or uneven paths may be difficult for visitors with limited mobility or pushchairs.