Self-Planting Garden Residents

This self-planting willow shades our pond and makes sitting beside it more comfortable.
Plants of various types rub shoulders in my garden — perennials, annuals, small trees, veggies, and vines. Most of these I planted. A few self-planting plants, however, I did not. Or in two instances, I planted the plant where I wanted it, and it moved to where it wanted to be. Here are brief descriptions of my uninvited or pushy, self-planting garden residents.
Willow Tree
The biggest example among my self-planting plants is the willow (salix) tree beside our pond. The seed of this tree floated in on the air and planted itself where it still stands. For several years, we cut it way back to keep it small. It, however, as willows do, wanted to grow big. Today, it is about 15 feet tall, and it shades the pond beautifully, making the chairs beside it much more comfortable to sit in throughout the day. We prune it rather severely each year to keep it at this size.