I went out and transplanted a number of small plants, both the ones which were carefully raised in the wheelbarrow, and others that had self sown.
While I was working I decided to pull up the 3 foot tall bird sown fig tree. I pulled and pulled, perhaps unwisely, and up it came with a single 4 foot long root which was growing along the soaker hose. I think there is a lesson there. Gardening really is a growing experience.