Q.Starting a wallflower from a cutting
Does anyone have details on this? Where do I cut the cutting on the plant? Do you just put it in the soil or do you have to place in water to start the roots growing on the cutting before planting? Is spring the right time to do this?

They root best as small side shoots. Pull from the plant with a small 'heel' attached.
Trim up the 'heel' so there are no strips of bark attached and remove the lower leaves.
Insert 1/3 of the cutting in a pot mixture of compost and perlite and keep moist in a well lit and well ventilated unheated location.
They can be planted out the following spring.
Take plenty of cuttings as the success rate can be low.
https://www.gardeningknowhow.com/ornamental/flowers/wallflower/growing-wallflower-plants.htm
https://www.gardeningknowhow.com/garden-how-to/projects/rooting-plant-cuttings.htm