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Perennial flowers that won’t spread

mishagoremano20743

mishagoremano20743 Posts: 5

2 March in Garden design

Hi,

I’m looking for suggestions for perennials (preferably flowers) that I can plant next to an open post-and-rail type fence, that wouldn’t be invasive or spread across to the neighbor’s lawn. Some annuals would be ok but I’m just thinking they’re much more prone to self-seeding everywhere. Located near Swansea, south Wales. South facing garden, sunny position with heavy clay soil.

Thank you.

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Posts

AnniD Posts: 12,585

2 March edited 2 March

Off the top of my head, Sedums, Penstemon, Armeria (possibly) and Lavender

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Fire Posts: 19,096

2 March

geranium Rozanne (sterile), linaria Canon Went (sterile)

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Plantminded Posts: 3,580

2 March

Helenium ‘Sahin’s Early Flowerer’ grows in a gradually expanding clump but does not produce seeds.

Wirral. Sandy, free draining soil.

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Fire Posts: 19,096

2 March edited 2 March

Helianthus Brown Eyed Girl
https://www.brooksidenursery.co.uk/helianthus-sunflower-sunbelievable-brown-eyed-girl-3-large-plug-plants.html

Helianthus annuus 'ProCut'

Thalictrum ‘Splendide’
Helenium ‘Sahins early flower’
Agastache ‘Blue boa’
Erysimum ‘Bowles mauve’

Geum ‘Totally Tangerine’

Lots of ideas here
https://www.irishtimes.com/life-style/gardening/2022/11/05/go-sterile-to-ensure-a-very-long-lasting-colourful-display-of-flowering-plants/

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Alan Clark2 in Liverpool Posts: 2,190

3 March

Daylilies also grow into a slowly expanding clump and do not self-seed, at least not on my clay soil.

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mishagoremano20743 Posts: 5

4 March

Thanks very much for all the suggestions, very helpful!

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punkdoc Posts: 15,039

4 March

Beware, some of those mentioned, eg Agastache, do seed, it is just that the offspring are usually not the same as the parents.

How can you lie there and think of England
When you don't even know who's in the team

S.Yorkshire/Derbyshire border
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Liriodendron Posts: 8,328

4 March

I believe the sterile linaria is Dial Park, @Fire. I grew lots of Canon Went from seed so it can't be that one...

Since 2019 I've lived in east Clare, in the west of Ireland.
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Fire Posts: 19,096

4 March

Yes sorry. My mistake. There are sterile agastache and linaria (yes, Dial Park). Apols

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