Dandelions love my allotment. The loose fertile soil seems ideal for them. They sink their long tap roots deep into the ground, and some are the size of small parsnips when pulled up.
Spring is the ideal time for them to flower, spreading their seeds all over the freshly dug plot. I make a special effort at this time of year to keep the grass nice and short, cutting off the flower heads in an attempt to keep their spread to a minimum.
See our allotment grass cutting guide.