help with plant identification

1.) this plant grows everywhere around here, and ive always wondered what it was --


2.) what kind of tree is this? are the berries edible?


3.) what kind of plant is this? the flowers smell very nice.


4.) anyone know what this is? the flowers are very pretty.


5.) and finally, what kind of plant is this one? the flowers are also quite nice.

1. looks like Japanese knotweed
2. Asian honeysuckle - not to my knowledge edible
3. something in the aster family I think - which narrows it down not at all
4. Dianthus aka pinks
5. Yarrow

#2 does look like some sort of Lonicera (honeysuckle)
#3 looks like it might be Erigeron (Santa Barbara daisy), but I'm not sure
#5 is yarrow