Generally two or more different cultivars are needed for cross pollination. This means that two grafted Grimo 112X chestnuts will not cross pollinate since they are identical twins. For cross pollination, two seedling trees or two different cultivars will be needed. Spacing requirements vary with the type and age of tree. Nut trees should be planted in good, well drained soil.
Drainage is more critical than soil type, though chestnuts prefer a sandy loam.
Fertilize with a cup of bone meal mixed in the soil at planting time. Do not use granular fertilizer in the first year. Increase the amount annually, continuing with the three applications. Do not feed after June 30th, as the trees may not harden properly for winter. Planted in small numbers, nut trees would require little spraying.