The Jeli Arboretum is most astounding during the blossom of the rhododendrons in May and June. Due to the careful establishment of the famous collective garden by Istvan Ambrozy Migazzi, the evergreen garden consisting of mostly rhododendrons could be created.
An interesting feature of the garden is that a section of it is organised by the continents the plants derive from, based on plant geography. The Founder rests in eternal peace near the garden.