Since it was founded in 1923, the Dutch family-run business Janssen Brothers Nurseries (Gebr. Janssen B.V.) has grown to become a highly reputable nursery. Since 1976, the company has become specialized in growing fruit tree rootstocks and is therefore unique in its sector.

The company has a very extensive and constantly expanding range of rootstocks for fruit trees such as apple, pear, cherry, and plum. Rootstocks for other types of fruit, such as apricot, almond, and nectarine, are also grown. Due to factors such as their consistent quality, the rootstocks of Janssen Brothers Nurseries are exported to fruit tree growers all over the world.

In addition to growing fruit tree rootstocks, the company invests a lot of effort in the continued development of innovations and research into optimal propagation of new high-quality fruit tree rootstocks.