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Low growing shrubs to replace alpine bed
We have an area about 6 feet square, that has been a kind of alpine bed. It keeps getting out of hand, so I want to replace the plants with low-growing shrubs. It gets pretty good sun and is on very free draining ground. Slightly acidic. Would heather fit here? Would it suppress some weeds? I know I will still need to weed a bit, and that’s OK. Any other ideas? Evergreen would be nice, but not essential.
Carmarthenshire (mild, wet, windy). Loam over shale, very slightly sloping, so free draining. Mildly acidic or neutral.
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A prostrate juniper would be good - https://www.rhs.org.uk/plants/74874/juniperus-squamata-blue-carpet/details I have one that is very low growing and spreading nicely and is a lovely glaucous blue.
I've used small leaved, variegated ivy as low growing ground cover tho it didn't like our last winter which was unusually cold for here. Have alook also at gaultheria which can make a good, low thicket and will have blossom and berries - https://www.rhs.org.uk/plants/83312/gaultheria-mucronata-crimsonia-(f)/details
You can have heathers in flower for quite long periods if you choose well, and some of the winter flowering ones don't need acidic soil, but they do need trimmed after flowering to avoid them getting woody and sparse. They're common here, and I try not to follow the trend of having loads of them, but I've had a couple of nice ones with white flowers, although I can't recall the names. Erica Springwood White was one though.
I use Iberis for groundcover and it isn't fussy as to pH. Our soil tends to be neutral to acidic. Tough and evergreen, although not a shrub, but makes a large specimen. White flowers in spring.
Some Pieris varieties don't get huge, so that's worth looking at. They're reasonably slow growing too, and can be pruned if they do get a bit big for the site later on, without any problem. It wouldn't need done often either.
I live in west central Scotland - not where that photo is...