The history of Arboretum Kalmthout goes back as far as 1856, when the Antwerp dendrologist Charles Van Geert started a proving ground in Kalmthout for his nursery in Antwerp. It remained a nursery until 1952, when the brothers Georges and Robert de Belder bought the site to create their private botanical garden there.

Under their leadership Arboretum Kalmthout grew into one of the world's most prestigious botanic collections. They introduced hundreds of new plants, which came from friends and growers all over the world. They collected seeds in the wild, and also selected a number of new cultivars. In addition to collecting new plants, increasing importance was given to scientific and educational aspects. The garden grew into one of the most valuable collections of woody plants in Europe.

In 1986 Antwerp Provincial Authority purchased the site and the property has been expanded and now measures over 33 acres The independent non-profit organisation “Arboretum Kalmthout” retained full responsibility for management, upkeep, and operation.

Jelena de Belder – the wife of Robert - was a big fan of Cyclamen, the tuberous plant from the forests of her homeland Slovenia. She planted very many of them in the garden since the 1980s. During our visit in September, we took a walk along the Cyclamen-trail with many so-called autumn cyclamen; sometimes a few together and in other places whole carpets of flowers.