Ask a Question forum→Young avocado tree sunburn? yellow/brown spots

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San Mateo, CA
yoon626
May 21, 2020 3:25 PM CST
Hi, my 1 year old avocado tree that I started from a pit is getting yellow/brown spots on older leaves, and very dry tips on new leaves. I'm wondering if this is from too much sun or salt? Or some nutrient deficiency? Attached some photos here. I am in northern CA and it's been getting morning sun until 2pm or so. I found the spots and moved so now it only gets the direct sun until around 12pm.

Also, the trunk was sun damaged about 8 months ago when I was gone for a trip. At that time it lost almost all leaves and I had to cut off the top 3rd of the tree. Fortunately, it recovered and developed more bushy looking tree! Anyway, is there any way it can recover and develop more sturdy trunk? Please help! Thank you.




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[Last edited by yoon626 - May 21, 2020 3:29 PM (+)]
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Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
May 21, 2020 4:55 PM CST
Welcome!

That's a nice looking tree. Older leaves dying is not a problem as long as new leaves are growing to take their place. The tree should slowly get bigger, not smaller. Smiling

Has this tree been in this pot since last year? If so, have you fertilized? If not, use some avocado/citrus food at 1/3 recommended strength now, and then 2 more times spaced over the summer. If you have fertilized and used full strength, don't fertilize until next spring.

Edited to add: It should be in the sunnier position.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
[Last edited by DaisyI - May 21, 2020 4:56 PM (+)]
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San Mateo, CA
yoon626
May 22, 2020 7:22 PM CST
Hi, thank you for your reply! Yes it has been in the pot for about 8 months. I gave some banana leaves and tea bags occasionally. Do those count or should I still fertilize it with lower dose regular fertilizer?

I moved it back to where it was so it gets more sunlight. So you think those brown spots on the leaves are not because of the sun?

Also, what do you think about the trunk with previous sun damage? Do you think it's still a good idea to put diluted white paint?

Thank you again!
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
May 22, 2020 8:04 PM CST
You should put the banana peels and tea bags in your compost pile. Fertilize the avocado (unless you already have). I think the brown spots are because of elderly dying leaves. I couldn't see previous trunk damage but, if you want to paint the trunk, use some light colored latex paint, it needn't be diluted. I get the sample size from Home Depot. My last tree trunk was a lovely shade of pink. Smiling
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: Carol
Santa Ana, ca
Sunset zone 22, USDA zone 10 A.
Charter ATP Member Bookworm Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California
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ctcarol
May 23, 2020 3:20 PM CST
The white latex paint wouldn't hurt. I've seen entire hill sides of old Avocado groves cut back to shorten structural branches, and painted white to rejuvenate the trees. Ghost Groves. Hilarious!
San Mateo, CA
yoon626
Jul 18, 2020 12:02 AM CST
Thanks again for the answers! Thanks to all of you my avocado tree is doing much better and grown a lot!! Here is a picture of it with a dog =)


I am thinking about pruning again to make it even more bushy. Any thoughts?
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