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Thank you Palustris. The reason for snowdrops is that my father tended the churchyard for 25 years and did indeed split and plant thousands of snowdrops there and there is a nice display every year. I thought it would be nice to mass his grave with them in recognition, but doesn't seem to be working. The area is certainly not dry as suggested, quite the reverse if anything.
Maybe, one year when they are established they will surprise us all as I know they can be temperamental