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’ 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’ 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 an early pollinizer. Suited for zone 6a-7b.
'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.
‘Simcoe’ 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.
'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 89' is one of our hand bred trees that is on trial. We offer it on black walnut rootstock. 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 pairs well with 'Imshu' or 'Campbell Cw1' or 'Grimo 94' for pollination purposes. 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. We offer it on black walnut rootstock. Testing NEW - late pollinzer, best paired with an early pollinzer. 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. We offer it on black walnut rootstock. It is the highest yeilding and boasts 34% kernel. It is an early pollinizer, so it is best matched with one of our two late pollinizers or 'Grimo 94'.
‘Grimo 107' produces a smaller nut but has a smooth inner cavity that allows the kernel to be released freely in one piece. We offer it on black walnut rootstock. This thinned shelled nut boasts 37% kernel. Testing NEW - best paired with an early pollinizer.
'Grimo 113' is a long slender nut, with a wide open cavity that allows the kernel to drop out whole. We offer it on black walnut rootstock. The shell is very thin allowing for handcracking. Suited for zones 6-8.