I have a plot of garden over-run with long, leggy, woody-stemmed, pink daisy-like flowers that I am told are 'flowers of the veldt.' I should like to clear and dig the area but save a few small plants to plant elsewhere in the garden. Is it possible to take cuttings? If so, when is the best time to do this? Are there any special tips? Thank you.
These are Star-of-the-Veldt, also known as African daisies. These plants are annuals but will self-seed readily. If you want to keep some to place in another area of the garden, it is best to save some seeds or take cuttings in fall. For more information on growing these plants and propagating them, these articles will help: https://www.gardeningknowhow.com/ornamental/flowers/african-daisy/african-daisies-osteospermum.htm
http://www.osteospermum.com/cuttings.htm
https://www.gardeningknowhow.com/ornamental/flowers/fgen/harvesting-garden-seeds.htm
I have left osteospermum in the ground over winter. The stems have grown quite thick.do I prune back quite hard or leave to grow again
These are annuals, and will only grow once, flower, and die. It will seed the area though. What comes up the next season will be fresh from seed.
You can cut down the area fully after the plant dies, before the new seeds sprout. Here is an article for more information on the plant: https://www.gardeningknowhow.com/ornamental/flowers/african-daisy/african-daisies-osteospermum.htm