Because pear trees sound "far away", planting two pear trees in the yard is like husband and wife. If the distance between the two is too far, the relationship between husband and wife will deteriorate faster. Pear trees will have a big hat and shade, which will affect the family's fortune. It's best not to plant them.
It is unlucky to plant pear trees at home without facing the gate. Pear trees have big hats and big shade, which will affect the fortune of the family. Moreover, it is unlucky to plant a pear tree with small white flowers and homophonic "far", but it can be planted next to the cemetery. It is unlucky not to plant pear trees alone.
Solemnly declare: the answer is for reference only, please don't be blindly superstitious.