The surviving, more cold hardy rough lemon (reported to survive temperatures below 20 degrees) was the rootstock and grew into a tree. As such, the rough lemon became the fruit of your tree.

It’s best to spray trees in May and June, or September through November, to control mites. Use caution when spraying as you can cause severe damage to the tree leaves if temperatures are above ...

Lemon trees are easy to grow, ... The Cape rough-skin lemon was brought to South Africa from the islands of St Helena four centuries ago and is the sweetest and best-known lemon tree variety.