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Author Topic: Campanula thyrsoides - set no seeds  (Read 32703 times)

Catwheazle

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Campanula thyrsoides - set no seeds
« on: August 25, 2025, 07:36:50 AM »
Hello, I've had both varieties of Campanula thyrsoides in cultivation and flowering several times. Unfortunately, they never set seeds for me, so I don't have any plants left at the moment. I want to try again this fall. Does anyone have any help?
Thanks!
Bernd
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Si hortum in bibliotheca habes, deerit nihil» Cicero, Ad Familiares IX,4

MarcR

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Re: Campanula thyrsoides - set no seeds
« Reply #1 on: September 14, 2025, 06:32:42 AM »
Bernd,

They frequently appear on the exchanges.
Between the SRGC and AGS exchanges you are very likely to find it.
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Marc Rosenblum

Falls City, OR USA

I am in USDA zone 8b where temperatures almost never fall below 15F -9.4C.  Rainfall 50" 110 cm + but none  June-September.  We seldom get snow; but when it comes we get 30" overnight. Soil is sandy loam with a lot of humus. 
Oregon- where Dallas is NNW of Phoenix

Catwheazle

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Re: Campanula thyrsoides - set no seeds
« Reply #2 on: September 14, 2025, 06:43:31 AM »
Hello,
that's not the problem. I received seeds and young plants. My question is: Does anyone have any idea why my plants aren't producing seeds?
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Si hortum in bibliotheca habes, deerit nihil» Cicero, Ad Familiares IX,4

MarcR

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Re: Campanula thyrsoides - set no seeds
« Reply #3 on: September 14, 2025, 06:59:35 AM »
Bernd,

I have read about a shortage of pollenators in Europe. Perhaps your plants are not being visited. You might consider buying some bees.
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Marc Rosenblum

Falls City, OR USA

I am in USDA zone 8b where temperatures almost never fall below 15F -9.4C.  Rainfall 50" 110 cm + but none  June-September.  We seldom get snow; but when it comes we get 30" overnight. Soil is sandy loam with a lot of humus. 
Oregon- where Dallas is NNW of Phoenix

Catwheazle

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  • Posts: 655
  • Country: de
  • USDA zone 6a
Re: Campanula thyrsoides - set no seeds
« Reply #4 on: September 14, 2025, 07:08:06 AM »
I'd also thought that a special pollinator might be present. Although: there are (still) quite a few wild bees and bumblebees in my garden. ...What could also speak for a special pollinator is the fact that they don't occur here in the mountains. 50-100 km away, in Austria, with the same soil and the same altitude, they exist again.
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