Ask a Question forum: Hydrangea Bloom issues

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NewGrower
Jul 21, 2017 1:17 PM CST
Hi, I have a white mophead hydrangea which was planted last spring 2016, after it bloomed within a few days the flowers have red spots and browned, I thought it was because they were new but exact same has happened this year. I keep well watered and they don't get to much sun. Is it fungus and can it be cured or should I dig out and replace?
Thanks in advance.
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Name: Philip Becker
Fresno California (Zone 8a)
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Philipwonel
Jul 21, 2017 1:33 PM CST
Hi there 😁 Flowers should last more than a couple days. Unless weathers to hot, or afternoon sun. They don't like afternoon sun.

I think you need to fertilize it with some Epsom Salts, as directed on box.
😎😎😎


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Name: Elaine
Sarasota, Fl
The one constant in life is change
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dyzzypyxxy
Jul 21, 2017 2:28 PM CST
Maybe you should test the pH of your soil? Hydrangeas generally like a rather acidic soil, and if it's too alkaline, a pinkish color can show up even on white ones. Add a good top dressing of compost (not potting compost, garden compost) every spring if your soil test comes back anywhere above a pH of 7.

Your foliage looks pretty nice and healthy but those flowers do look sort of burnt. Philip may be onto something with the afternoon sun idea, too. Is that possible?
Elaine

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Name: Rj
Just S of the twin cities of M (Zone 4b)
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crawgarden
Jul 21, 2017 2:40 PM CST
With the brick in the background and south or west facing site, you could possibly "frying" the blooms.

If planted in full sun or late afternoon sun they will brown. They also need to be watered deeply, if they wilt to many times they can brown, make sure you have mulch around them and try to water at the base and avoid watering the blooms and leaves.







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NewGrower
Jul 21, 2017 2:41 PM CST
dyzzypyxxy said:Maybe you should test the pH of your soil? Hydrangeas generally like a rather acidic soil, and if it's too alkaline, a pinkish color can show up even on white ones. Add a good top dressing of compost (not potting compost, garden compost) every spring if your soil test comes back anywhere above a pH of 7.

Your foliage looks pretty nice and healthy but those flowers do look sort of burnt. Philip may be onto something with the afternoon sun idea, too. Is that possible?


Thanks,
Of them is in a sunny spot but the other only receives a couple of hours of early morning sun and probably looks worse than the one that's in the west facing spot. They are watered regularly and planted in full compost as it was new planters we had built. The greenery is very healthy and full which makes me question my theory of fungus as surely leaves would be affected more. I'm not sure if it can be seen but the red/pink are actually spots that have a brown centre so I don't think it's the colour of flower changing. My purple hydrangea is next to this one and is perfect with no problems at all. It's heartbreaking as it's grown so big since last year and fills the areas nicely.

[Last edited by NewGrower - Jul 21, 2017 2:44 PM (+)]
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