One of the things I admire about plants - and one of the things I love about gardening - is that however much you try to tame them, if they wish to move elsewhere then they will do so. When I lived in the Midlands we used to visit a National Trust property (can't remember which one) where a tiny, daisy-like flower had taken over almost every gap between paving flags all over the garden. They flowered for almost the whole Summer and people came from miles around just to see them. And, of course, they had never actually been planted there. Vita Sackville west said in one of her books that plants always seemed to choose better places to put on a display than the place you had chosen for them (she was talking about violets, which also have that disposition to choose a different spot.
At the moment the patches of grass on our estate
(and their are many. It is a very well laid out estate) are peppered with dandelions. What a pity they are viewed as weeds - with a name like 'lion's teeth' they would be such a popular choice if they were in pots in garden centres. Alas, within the next week the council lawn mowers will be round to cut the grass and they will have gone before they have time to seed - not that the council will ever win. They will be back in profusion next year with all those thousands of seeds on their heads many will take root however hard we try to stop them. I looked out of the window this afternoon and D, my gardener, was carefully watering my front lawn with weed-killer (or should I say dandelion killer because that is mostly what they are).
The other popular plant round here that 'does its own thing' is the grape hyacinth. Oh yes, they start off as neat little blue patches of flowers this time of year - next year they have double in size and the year after that they have started waltzing away down the road to colonise any spare bit of ground. One of the plants we love to hate but we can't bring ourselves to pull them up as they are such a beautiful blue. Yes, I am afraid we are just big softies at heart where gardening is concerned.