Lapin cherry trees are indeed self-fertile. They should fruit by five years. If this is not happening, there are other reasons. Did the tree flower? If not, is the tree being pruned too severely? It is important not to cut off the spurs or short shoots on which flowers form. Did the tree flower but not fruit? If the tree does not require another pollinator (as in this case), the problem could be cold and/or wet weather during bloom, which reduces the activity of pollinator insects, preventing the transfer of pollen. Such weather conditions also prevent pollen tube growth in the female parts of the flower. We hope this advice is helpful and would suggest contacting your tree nursery.
Lapin cherry trees are indeed self-fertile. They should fruit by five years. If this is not happening, there are other reasons. Did the tree flower? If not, is the tree being pruned too severely? It is important not to cut off the spurs or short shoots on which flowers form. Did the tree flower but not fruit? If the tree does not require another pollinator (as in this case), the problem could be cold and/or wet weather during bloom, which reduces the activity of pollinator insects, preventing the transfer of pollen. Such weather conditions also prevent pollen tube growth in the female parts of the flower. We hope this advice is helpful and would suggest contacting your tree nursery.