Summer Festival Botanical Garden JGU Mainz
Nature experience, plant bazaar and concerts in the Botanical Garden of the University of Mainz
About Summer Festival Botanical Garden Mainz
The Botanical Garden of Johannes Gutenberg University Mainz is one of the most diverse university gardens in Germany. On approximately ten hectares on the edge of the campus, over 8,500 plant species from all climate zones on Earth grow — from the alpine rock garden and the tropical houses to the systematic bed area, where the relationships between plant families are clearly illustrated. The annual Summer Festival, traditionally held on a Sunday in August, opens this scientific collection to a broad audience in a particularly festive setting.
From 11 a.m. to 6 p.m., the garden transforms into a vibrant place of learning, experience, and encounter. Garden staff, scientists from the Institute of Organismic and Molecular Evolution Biology, and garden enthusiasts from numerous associations create a packed program. Themed tours explore the Mediterranean area, the succulent collection, the useful plants section, and the medicinal plant quarters maintained with the Rhineland-Palatinate Chamber of Pharmacists. In the show house complex, guests encounter tropical orchids, bromeliads, and carnivorous plants. The plant bazaar, one of the day's highlights, offers perennials, potted plants, and seedlings cultivated by specialty nurseries and plant lovers — from tomato rarities to beloved hibiscus varieties.
The Summer Festival also serves as an educational offering on biodiversity. At activity stands, researchers and association representatives explain the importance of wild bees and bumblebees, demonstrate identification methods for native wild herbs, or show how insect hotels and deadwood piles can ecologically enhance one's own garden. Children can repot plants, roll seed balls, identify butterflies, or test their knowledge with nature memory games. Live music on the lawn in front of the main building, regional food stalls, coffee and cake, and an ice cream vendor provide culinary accompaniment to a relaxed late summer day.
Nestled between the university campus and the Hartenberg-Münchfeld recreational area, the Botanical Garden is easily accessible on foot, by bike, or via Mainzer Mobilität. For decades, the Summer Festival has been a fixture on the city's event calendar and is a vibrant expression of how the university, city society, and nature enthusiasts can come together.
Summer Festival Botanical Garden Mainz — edition 2026
The 2026 Summer Festival promises a packed program combining science, gardening, and festive culture. Starting at 11 a.m., staff and association members will welcome guests at the entrances on Anselm-Franz-von-Bentzel-Weg and Becherweg. Guided tours will depart every half hour, alternating between the show houses, the Mediterranean plant world, the medicinal plant quarters, and the systematic department. The plant bazaar at the central festival square opens at 11 a.m. and offers rarities from local specialty nurseries and enthusiasts. Concurrently, botanical associations, beekeepers, and nature conservation groups from Rheinhessen will present their work. In the late afternoon, a concert on the festival lawn will conclude the day before the festival winds down around 6 p.m.
Programme Summer Festival Botanical Garden Mainz 2026
Sunday, August 23, 2026
- 11:00 AM — Opening of entrances, start of the plant bazaar
- 11:30 AM — First themed tour of the show houses (tropical, succulents)
- 12:00 PM — Tour of medicinal plants with the Rhineland-Palatinate Chamber of Pharmacists
- 12:30 PM — Children's activity: rolling seed balls at the educational stand
- 1:00 PM — Tour of the Mediterranean area and rock garden
- 1:30 PM — Wild bee activity stand with the Nature Conservation Union (NABU)
- 2:00 PM — Tour of the systematic department (plant families)
- 2:30 PM — Lecture on biodiversity in urban areas
- 3:00 PM — Family tour with nature explorer rally
- 3:30 PM — Identification workshop for native wild herbs
- 4:00 PM — Live music on the festival lawn, coffee and cake
- 4:30 PM — Tour of the useful plants section
- 5:30 PM — Closing concert at the main building
- 6:00 PM — Festival concludes
The exact 2026 program will be published by the organizer in the summer on the official website. The structure follows the proven key points of previous years.
Highlights Summer Festival Botanical Garden Mainz 2026
- Themed tours of the show houses, medicinal plant, and Mediterranean areas
- Plant bazaar with rarities from specialty nurseries and enthusiasts
- Hands-on activities for children focused on plants, insects, and pollinators
- Live music on the festival lawn, regional food stalls, and coffee & cake
- Free admission for all garden visitors
Prices Summer Festival Botanical Garden Mainz 2026
Practical information — Summer Festival Botanical Garden Mainz
Getting there: Anselm-Franz-von-Bentzel-Weg 9b, 55128 Mainz, on the campus of Johannes Gutenberg University. Accessible via Mainzer Mobilität bus lines 54, 55, 56, 57, 58, 68, 69, 75, and 76 (stops Universität, Friedrich-von-Pfeiffer-Weg). Limited parking available in the Forum / Natural Sciences parking garages.
Admission: Free for garden visitors. The Friends' Association welcomes donations for the preservation of the plant collection.
Accessibility: The main paths are mostly paved and accessible with wheelchairs or strollers. Accessible restrooms are available in the main building.
Family-friendly: Special children's program, changing facilities, lawns for relaxing. Please wear weather-appropriate clothing.
Dogs: For the consideration of the collection and other guests, dogs are not permitted in the Botanical Garden.
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