Heartnut
The heartnut is a seed sport of the Japanese walnut. Rather than the normal egg-shaped Japanese walnut shell, the heartnut is a flattened heart-shpaed nut that readily splits in two halves. When rapped on the edge, it opens like a locket, easily releasing the kernel. All of our selections have rated highly for cracking quality, nut quality and productiveness. The heart shape with the good cracking quality may not come true in the seedlings as it does in the grafted trees. Heartnuts are generally hardier and walnut blight resistant than Persian walnuts and have great commercial potential in the Great Lakes fruit growing region, a climate similar to its native Japan. If only two grafted cultivars are desired, be sure to order an early pollinizer to match with a late pollinizer for best cross pollinization. Go to FAQ for commercial growing information. Winter protect grafted area of the tree for the first 2-3 years in the colder zones of 5b-6a. Seedling trees are suited for zones 5a-7. Tree size can range from 10-15 m (40 ft) in height and spread .
We grow our seedling heartnuts from our best selections. This improves the chances of getting a good cracking heartnut. Suited for climate zones 5b-8.
'Imshu' is a heavy producer of medium sized nuts. With careful cracking, Imshu will crack out whole meats that drop out of the shell freely. It is a late pollinizer, so it is best matched with an early pollinizer. Nuts ripen and begin dropping in the last week of September. Suited for climate zones 6b-8.
‘Imshu’ heartnut grafted on black walnut rootstock is best suited for commercial growers. Heartnut grafted on black walnut are usually more productive than heartnut on heartnut rootstock. It is a late pollinizer. Suited for zones 6a-7b.
'Campbell CW1' is a heavy producer of medium sized nuts.The nuts will crack out a mixture of halves and whole meats that drop out of the shell freely. It is a late pollinizer, so it is best matched with an early pollinizer. Nuts ripen and begin dropping in the last week of September. Suited for climate zones 6b-8.
‘Campbell CW1’ heartnut grafted on black walnut rootstock is best suited for commercial growers. Heartnut grafted on black walnut are usually more productive than heartnut on heartnut rootstock. It is a late pollinizer. Suited for zone 6a-7b.
'Campbell CW3' is a heavy producer of medium sized nuts. It is a more compact tree but still keeps up in production with larger more spreading trees. The nuts will crack out a mixture of halves and whole meats that drop out of the shell freely. It is an early pollinizer, so it is best matched with one of our two late pollinizers. Nuts ripen and begin dropping a week after 'Imshu'. Suited for climate zones 6b-8.
'Simcoe' formerly 'Simcoe 8-2' was selected from a planting at the Simcoe Station Experimental Farm. It is a large Valentine heart shaped nut that freely drops out a mixture of whole and half nutmeats. It is an alternate bearer on a two-three year cycle with heavy and lighter crops. It is an early pollinizer so is best matched with one of our 2 late pollinizers. Nuts ripen 2 weeks after 'Imshu'. Suited for climate zones 6b-8.
'Stealth' is a large elongated nut and a moderate producer. The nut meat drops freely out of the shell whole. It is an early pollinizer and so is best matched with one of our two late pollinizers. Nuts ripen 2 weeks after 'Imshu'. Suited for climate zones 6b-8.
'Grimo 75' is a small heartnut that cracks perfectly each time. It is a new listing that we are observing! It is a cross of 'Campbell CW3' x 'Imshu', two of our most productive cultivars. It is receptive first like its parent 'Imshu'. Suited for zones 6-8.
'Grimo 89' is one of our hand bred trees that is on trial. It is a cross of 'Campbell CW3' x 'Imshu'. It has a medium/large size nut that cracks perfectly when cracked on the edges.It allows the nut meat to drop out whole and has 29% kernel. It is an early pollinizer, so it is best matched with one of our late pollinizers including 'Grimo 94', 'Imshu', 'Campbell CW1' or 'Grimo 75'. Suited for zones 6-8.
'Grimo 94' has much potential with a smooth inner cavity that allows the kernel to be released freely in one piece . Grimo 94 is protogenous, that is, it is a late pollinzer, best paired with early pollinzers. It averages 30% kernel. Suited for zones 6-8.
'Grimo 99' has much potential with a smooth inner cavity that allows the kernel to be released freely in one piece. It is a cross of 'Calander' x 'Rhodes'. It is one of the highest yielding boastng 34% kernel. It is an early pollinizer, so it is best matched with one of our late pollinizers including 'Grimo 94', 'Imshu', 'Campbell CW1' or 'Grimo 75'.
'Grimo 99' has much potential with a smooth inner cavity that allows the kernel to be released freely in one piece. It is a cross of 'Calander' x 'Rhodes'. It is one of the highest yeilding and boasts 34% kernel. It is an early pollinizer, so it is best matched with one of our late pollinizers including 'Grimo 94', 'Imshu', 'Campbell CW1' or 'Grimo 75'. Suited for zones 6-8.
'Grimo 146' is a nut, with a wide open cavity that allows the kernel to drop out whole. It is a cross of 'Simcoe' x 'Imshu'.It is an early pollinizer, so it is best matched with one of our late pollinizers including 'Grimo 94', 'Imshu', 'Campbell CW1' or 'Grimo 75'. Suited for zones 6-8.
'Grimo 146' has much potential with a smooth inner cavity that allows the kernel to be released freely in one piece. It is a cross of 'Simcoe' x 'Imshu'. It is an early pollinizer, so it is best matched with one of our late pollinizers including 'Grimo 94', 'Imshu', 'Campbell CW1' or 'Grimo 75'. Suited for zones 6-8.