Meyer Lemon Trees

Question

I have two Meyer Lemon Trees. The oldest is around four years old and was very prolific and now is struggling. Part of the tree have died and it’s struggling although recently it tried to put out fruit and I removed them in order to focus on growth.

The second tree is approximately two years old. It is covered with lemons the size of oranges but the leaves are now displaying the same coloration as the older tree.

I have photos of both sizes of some leaves. Can you tell what’s wrong and how to treat the problem?

I tested the soil and I am now adding peat moss to lower the alkaline level. I have use a Neem Oil spray and soil drench.

Soil is clay.
Thank you @[e-mail]

• 
• 
• 
• 

Answer 1

Well you treated it for insects and a nutrient deficiency caused by high pH. The other possibility is a bacterial or fungal infection. See treatments below:

https://www.gardeningknowhow.com/edible/fruits/lemons/common-lemon-tree-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-leaves-turn-yellow.htm
https://www.gardeningknowhow.com/edible/fruits/lemons/pests-of-lemon-trees.htm