Hamlet 4.7 Word Nerd: Weeds

Ophelia climbs branches to hang a crown made of weeds, which in Shakespeare's time referred to plants by rivers. She falls with her weedy trophies, which symbolize both her garlands and mourning attire for her father and herself.

What does the act of climbing branches symbolize for Ophelia?

In what way do the weeds represent both Ophelia's father and herself?