Red blueberry leaves and a black powder on the edge of sunflower leaves.

[BlackThumb]

Hello,

I have three blueberry plants and a few sunflowers growing. They are all growing in pots, but the sunflowers are kept outside, and the blueberries are now indoors after being left outside for a while.

The sunflowers have started to have a grey-black powder at the edge of their leaves. Not all, but I broke them off and am hoping it won't come back.

Two of the blueberries started having reddish-brown leaves, which don't seem to have worsened since I took them inside. However, the plant which did not develop these leaves has just developed two small bright red leaves.

Please excuse the photo quality!

Here is the blueberry with the bright red leaf:

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These are the browny-red marked leaves:

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As for the grey-black powdery substance on the edge of the sunflower leaves, I threw the leaves in the bin. One has it very slightly, but not enough for it to show up on this camera.

Thank you.

[Boron Elgar]

I've many blueberries, and that overall reddish tone is what they exhibit in late fall as they are about to drop their leaves.

Still, the spots may be more problematic and have something to do with the change from outdoors to indoors, nutrition or watering..

As someone who grows many plants in tubs and large containers and does so "out of climate," necessitating bringing them in for protection over the winter, I must inquire as to why the blueberries are being taken inside this time of year. If your sunflowers can survive outdoors in June, your blueberries should, too.

Can you give more background, please?

Boron

[BlackThumb]

Thank you for your reply!

I got the blueberries delivered from an online plant shop (Thompson and Morgan. They're reputable). They were healthy until I put them outside. I then brought them indoors when I noticed that two of them had started going reddish.

A few days were hot and I watered them when the soil felt dry, then the weather became more wet, so I stopped watering them.

I'm not sure if that's the sort of information you wanted.

[BlackThumb]

As for the sunflowers, the grey/black keeps coming back on the edge of the leaves. I don't know if it's a pest for a fungi, so was going to buy a pesticide that kills fungi as well, but I don't like the idea of using pesticides.

I've been searching online for safe ways to kill pesticides and fungi, but they're all for specific problems, and I don't know what's causing it.

Does anyone have any suggestions?

[Boron Elgar]

Blueberries are generally outdoor plants. There are different varieties for different climates, though. Did you order ones appropriate for where you live? Do you plan on planting them in the ground?

It is always dicey to diagnose online...there can be many variables involved.