Am trying to design rockery - are there any long-flowering plants, low growing? Have read of Erigeron karvinskianus but at 40cm high it's a bit tall. Thanks.
Try a good alpine nursery like Edrom. There are others, but I can't remember the names right now, just g***le Alpines and have a look, you'll be spoilt for choice. They may not all flower all summer , but you should be able to have something in flower or looking good for most of the year, if not quite all
My Erigeron karvinskianus doesn't make 40cm unless it's growing up into something else. It's more of a sideways spreader, growing out along the ground, probably 20cm tall or less, which wuld also be a problem in a rockery planted with small choice alpine plants. I have dry poor sandy soil though, it might get taller on rich moist stuff.
Doncaster, South Yorkshire. Soil type: sandy, well-drained
Try Ice Alpines. I bought some delosperma from there last year which were very long flowering. But I have alpines in a collection of pots rather than in a rockery.
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