This is taken from a local free paper, "The Visitor":
"I've heard it said in Dorset that Good Friday is the one day of the year when Satan can't tamper with the soil, so anything planted on that day will thrive. Gillyflowers sown at midnight are reputed to do especially well"
I know gillyflowers as dianthus or carantions, that family. Oddly enough, I icked up a packet of dianthus seed in the shop this morning, but decided against them - maybe I should have got them and gone out in my nightie................LOL