By Robert22
United Kingdom 
Low growing long flowering perennials
23 Mar, 2016
Answers
Sun or shade, heavy or light soil? And long flowering, hmm, max you'll get is up to six weeks from any ground cover perennial, more usually 2-4 weeks.
23 Mar, 2016
Perennial geraniums - sanguinium are the lowest growing.
23 Mar, 2016
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are you after suggestions?
Vinca, pachysandra, campanula [the carpeting type] are 3 that do ok.
23 Mar, 2016