There is one more spring song in the Piae Cantiones (1582). in the section “De Tempore Vernali Cantiones”. Here is my transcription:
In Vernali Tempore – 2 page version
In Vernali Tempore – 1 page version
This tune was also adapted into a Christmas carol by John Mason Neale, O’re the Hill and O’re the Vale, though I don’t believe it is as well known as the Good King Wenceslas tune. Again, the 16th century Latin words are for Spring. I think the tune of In vernali tempore is quite lovely.
A translation of the first 2 verses is available here.
A rhyming metrical translation by Sir James Steuart Wilson is also available here.
Here is a performance of In Vernali Tempore by Joculatores Upsalienses with some added instrumental interludes: