Tried the plants, or tried Plant World? I order from them, would certainly recommend. They ship well handled seeds that are as they describe.

The angelica should be fairly straightforward...pre treatment not required but a 2 week moist chill might improve germination.

No pretreatment for the silene either but germination can sometimes be slow for s. dioica that appeals to you. Keeping that in mind, you might want to get going on that order coming from overseas.