Honey murcott mandarin
Honey Murcott mandarin- the fruit is smallish and some are greenish in centre and hard when cut open. What does my tree need? Have an orange tree one side and a lemon the other and these are fruiting perfectly. The trees all look green, lush and healthy. 3 years ago had the best fruit on the mandarin, so huge and juicy. Now it's been diminshing every season. Help please.
I would recommend a soil test. You could have an imbalance in Nitrogen/Phosphorous levels.
Check watering, even though 2 of the trees are doing well, water is key to citrus success.
Here are some links for you.