From the photos it looks like older leaves on the plant that are turning chlorotic. A certain amount of this is to be expected as the plant grows and leaves, such as those at the bottom of the plant, get increasingly shaded. The newest growth appears healthy, which is a good sign. Chlorosis of older leaves can also be caused by nitrogen deficiency as well as drought stress. Drought stress is an unlikely cause at this time of the year, as soils are well supplied with water. However, if you have not fertilized, you might consider doing so. One other thing, your description of the planting location indicates that the plant would get no direct sun and this plant actually performs well in partly sunny locations. so, the floppy growth may be a response to the lack of any direct sun as it "stretches" towards more light. Problems with dieback on Daphne are usually the result of growing in a poorly drained location, but at this point I don;'t think that is an issue with your plant.

Thank you, Neil.  1) What fertilizer recommendations do you have, in terms of product (NPK) and timing of application over the course of a year?