It so happens that I sang this yesterday, before I ever read this thread! Some french friends present who recognised the melody.
Here's the version I was taught a few years back (in Edinburgh):

LOVE IS COME AGAIN                                

Now the green blade riseth from the buried grain,        
Wheat that in the dark earth many days has lain;
Love lives again, that with the dead has been;
Love is come again,    like wheat that springeth green.         
                                                
When our hearts are wintry, grieving, or in pain;
Thy-y touch can call us back to life again;
Fields of our heart that dead and bare have been;
Love is come again,         like wheat that springeth green.        

In the grave they laid him, love whom men had slain;
Thi-inking that never he would wake again;
Laid in the earth like grain that sleeps unseen;                
Love is come again,         like wheat that springeth green.        


Now the green blade riseth from the buried grain,
Wheat that in the dark earth many days has lain;
Love lives again, that with the dead has been;                
Love is come again,        like wheat that springeth green.        
Love is come again,         like wheat that springeth green.        

Tune: Medieval French Christmas Carol "Noel Nouvelet"
Dorian mode

Words: Canon John Macleod Campbell Crum (1872-1958)
In this version more associated with Easter and Spring