When Will Lone Filbert Nut Tree Mature?

Q: I harvested one lone filbert nut on my tree. When will the tree mature and give me more? 

A: Congratulations! You have accomplished the typical yield from a single filbert tree. The reason is that filberts (and hazelnuts) have male and female flowers on the same plant but the pollen is self-incompatible. Filberts require another tree nearby to provide appropriate pollen. If you plant another tree, let me know how your yield increases.

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