Pictured here is an avocado tree started from seed by a friend just a couple of years ago! It was started from a Haas avocado, but because plants started from seed do not usually produce specimens ‘true to kind’, it may not have all the characteristics of the true Haas. However, so far the leaves and such seem to be developing along the lines of a Haas. When I received the plant, it was getting pot bound, so I moved it to a larger container, and plan on putting it in the ground this coming spring.
If you enlarge the picture, you can see that the leaves were developing large brown areas. In spite of research, I could not diagnose the problem, but it was causing the leaves to fall off (and it was not water, sun or fertilizer issues). I tried copper to no avail, so next I mixed a batch of aerated compost tea and sprayed these on the leaves, and voila, the new leaves are coming in nice and full without browning!
In this picture, I have a nursery purchased, grafted, “Brogdon” avocado tree that I purchased a couple of months ago (lots of growth since then!). This is one of the more typical Florida avocados, and I picked the Brogdon because it is cold tolerant down to 24 deg F. Now the mango on the left (and the small one from seed in the pot) are going to be a challenge to protect in the NE Fl climate. Anyhow, you can see how much different the leaf structure is on the Brogdon as compared with the seed started Haas. I am also not sure about how much cold the Haas seedling can handle, and it’s questionable when/if it will flower or produce anytime soon, being that it is not grafted.