Euphorbia lathyris, aka Caper Spurge
One of the comfreys. Symphytum orientale maybe
Bee pollination would only affect the next generation, the seedlings from the parent. Is it multi-stemmed from the base? I don't know camellias (very alkaline here) are they grafted and growing from the rootstock?
Mildew, usually a result of being to dry which easily happens in a pot. A honeysuckle is a big plant and better in the ground.
They can tolerate a good bit of cold but sometimes when you buy these plants they've never been outside and have grown very soft. The frosts we had a few night ago would brown them off. I should think the plants themselves are OK
I love those moss covered stones