Still working on the proper chords, will update later but here is the guitar part that follows
the voice line... one guitar can play "treble" and the other bass- or go ahead and blend 
two for a fuller sound on one guitar.

Chords are above the words

Bb    F       Bb  F  Eb Bb                  Eb  F
Edelweiss,   edelweiss, Every morning you greet me - 
Small and white,  clean bright, You look happy to meet me


e|--------8------6------------------1--3--1--------------------------------------------|
B|-----6------------6--4--3-3-3--4-----------------------------------------------------|
G|--7----------------------------------------------------------------------------------|
D|-------------------------------------------------------------------------------------|
A|-------------------------------------------------------------------------------------|
E|-------------------------------------------------------------------------------------|
Bass
e|---------------------------------------------------------------------------------------|
B|---------------------------------------------------------------------------------------|
G|-------5---3---------------------------------------------------------------------------|
D|----3---------3--1--0-0-0--1--3--5--3--------------------------------------------------|
A|-5-------------------------------------------------------------------------------------|
E|---------------------------------------------------------------------------------------|

C          F             Bb              Gm          C
Blossom of snow may you bloom and grow, Bloom and grow, forever

e|--8-----5----------------6---3--6--8--6--5----|
B|-----6-----8---6---3--6---------------------6-----|
G|-----------------------------------------------|
D|-----------------------------------------------|
A|-----------------------------------------------|
E|-----------------------------------------------|
Bass:
e|---------------------------------------------|
B|---------------------------------------------|
G|-------2--------------3------3--5---3--2-----|
D|----3-----5--3--0--3------5---------------3--|
A|--3------------------------------------------|
E|---------------------------------------------|

Next two lines "Edelweiss, Edelweiss
Bless my homeland forever" follow the same thing as above.