A successful zone 5 experiment !
"Ranuculous is said to only be hardy to a zone 8 I live in an area said to be zone 6 but I'm in a colder microclimate on the north side of a ridge getting lett sun than the surrounding area and staying frozen solid for much longer, 2 years back I spring planted Ranuculous and got a couple decent blooms and dug them up with my dahlias well come spring I missed a few because they came up all by themselves even without additional mulch! So I fall planted Ranuculous and threw a whole wheelbarrow of pine needles on top of them for frost protection and they amazing! Even after a week of sub 0 temps not getting above 0 even during peak day temps! They bloomed wonderfully! Next year I will knock some of the pine needles off the top because it was warm enough down there they sprouted while still covered with pine needles and were weak because of it, not thier fault because i failed to check on them. Looking forward to more nice full Ranuculous again next spring!"