Ask a Question forum→Blueberry leaves drought symptoms? Brown patches on leaves

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Northern California
Mercurianmad
Jun 2, 2020 9:14 AM CST
Yet another question about the blueberry plants.

We just had some rainy days followed by some very hot sunny days and my blueberry plants are getting these brown patches in the center.

When I look it up it seems to look like drought symptoms but my plants are always kept well watered. They are in smart pots though so they also drain pretty well. The plants themselves are mounded in the pots. So I don't think that it could be a drought kind of thing. It doesn't look like any of the blueberry rust diseases that I saw. It really looks like drought symptoms.

The only thing I can think of that might've stressed the plant is that on hot days it's been 95° here with 60° nights. Could heat have stressEd them out?

Totally lost sorry about all the blueberry questions but I'm still learning about them and still find them quite tricky to grow.
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Name: Big Bill
Livonia, Michigan (Zone 6a)
American Orchid Society Judge
Region: United States of America Critters Allowed Growing under artificial light Echinacea Hostas Region: Michigan
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BigBill
Jun 2, 2020 9:49 AM CST
That is relatively minor damage from what I see in the pictures. It could very well be related to heat stress. It could be as a result of container growing.

When my kids were younger we all went blueberry picking in SW Massachusetts. There were hundreds of blueberry bushes. Not a single one grew perfectly!! Not one! A little leaf damage is to be expected.
If your soil is acid enough, and it drains quickly and you water them properly, they should be fine.
I think that I have talked to you before about blueberries. Mine are innthe ground. I am in my second season and I just inspected mine yesterday. No real leaf damage, but when I had less then 10 berries produced last year in year #1, and this year I am estimating 300+/-, I am quite pleased.
But what do I think about your issue, I don't think that blueberries enjoy the heat! And in a container over the coarse of several days, those roots can really heat up! And I don't think that that is helping you any. I think that the heat might be your main problem.
There are dwarf varieties that are better suited perhaps for containers. Did you buy those or just buy whatever was available. I am growing High Bush Blueberries that can get to be 6-8' high and 6' wide. I don't see them doing as well in a container! Just a thought.
I would just give it a few years and see how they do. I would stop trying to grow immaculate blueberries. It ain't happenin'.
Rodney Wilcox Jones, my idol!
Businessman, Orchid grower, hybridizer, lived to 107!
Name: Big Bill
Livonia, Michigan (Zone 6a)
American Orchid Society Judge
Region: United States of America Critters Allowed Growing under artificial light Echinacea Hostas Region: Michigan
Butterflies Lover of wildlife (Raccoon badge) Orchids Cat Lover Birds Bee Lover
Image
BigBill
Jun 2, 2020 10:20 AM CST
Here are a few images of mine.
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Not to brag but three bushes in the ground. No instruments, no meters. Fertilized in mid April and again in two weeks. Mine never dry out!
They get direct sun from noon until the sun goes down. They are in the ground using native soil, peat moss, and a half cup of Hollytone when planted last year.
I applied some more like I said in April. If you learn to trust your eyes, you'll do a lot better then by relying on some meter. Those moisture meters are noted for being inaccurate.
The first bush is two feet high, the other two are approaching three feet. Date of Planting was April 20, 2019.
Aside from a little munching on leaves, no brown spots.
I still think that your choice of containers might be the source of your issues but I do not see any of them as being serious.
Rodney Wilcox Jones, my idol!
Businessman, Orchid grower, hybridizer, lived to 107!
Northern California
Mercurianmad
Jun 2, 2020 10:31 AM CST
Thanks guys. I guess I freak out about the blueberries too much lol. They get mornjng sun and afternoon shade. They are Northern high bush, only one grows 6-8 ft. The rest are 4-5 ft. The heat is probably messing with them but I will stop fretting over every leaf😅

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