What a fruit tree looks like as a young sprout

4 avocado trees All of these avocado trees are doing well, as you can see in the images below: This is the shortest avocado tree below and its older leaves look like they're dying while its new leaves are healthy and growing very fast. I'm only using a small grow light too for them to grow so fast which is nice:  This is my 3rd tallest avocado tree below which is doing very well. It has healthy new green leaves at the top: This is my second tallest avocado tree below which is very tall, and it is the only one of my four avocado trees that isn't directly using a grow light, but getting light directly from the sun. And from mainly using the sun, it has grown healthy new leaves at the top of its branch: This is my tallest avocado tree b elow and it is doing very well. The first image shows the entire avocado tree. The next 3 images show different areas of the avocado tree, which are- the branch off to the side(second image), the top 5 branches(third