Last Year Grapefruit Size Oranges, This Year Mandarin Size Oranges

Question

Last year my Orange tree put out meaty, sweet, juicy grapefruit size. This year they are Mandarin size and on the sour size. So What happened and what can I do.

Answer 1

This can be mitigated by checking soil nutrition and pH, periodically. Amend as necessary.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm