My friend was examining her bean seedlings the other day and found one growing upside down eg roots growing through the top of the soil and when she emptied it out for a closer look, stem and leaves growing straight down where the roots should have been. She said it was a really horrid, freakish thing and immediately put it in the bin. All the bean seeds were planted in peat pots and appropriate compost, kept in the greenhouse. All other seedlings were normal. Has anyone come across this ? And what would have caused it ? Thanks.