Heartnuts are also known as the Japanese walnut (Juglans ailantifolia) although they are really a sport of the normal oval shaped nuts. The cultivated varieties have a heart shaped nut that cracks open on the edge and have been selected for flavour, cracking quality and productivity. Heartnuts are normally hardier than English walnuts (Jugalns regia) and more resistant to walnut blight. Even though they are generally partly self-fertile it’s better to plant two or more cultivars to help pollinisation. They need full sun and well-drained soil and in the first few years concentrate on putting down a long taproot. During winter it is worth using fleece to protect the grafted area of the tree for the first few years. Trees can grow to 10-15 m in height and width.
|Campbell CW1||Canadian Heartnut that produces a good crop of medium/large nuts, partly self-fertile, late pollinator.|
|Campbell CW4||Heartnut bread by Doug Campbell of Ontario, Early pollinator, Compact tree with a good yield of medium size nuts, late pollinator.|
|Grimo Manchurican||US Heartnut that produces a good crop of medium sized easily cracked nuts, partly self-fertile|
|Imschu||Reliable heavy cropping Canadian Heartnut that has medium sized nuts that crack out whole. Partly self-fertile and late pollinator.|
|Schubert||Canadian Heartnut that produces medium nuts, partly self-fertile, late flowering and vigorous tree, parent of Imschu.|