What about the tradition of wassailing the apple trees to get them to bear?
Old apple tree, we'll wassail thee
And hoping thou wilt bear.
The Lord does know where we shall be
To be merry another year.
To blow well and to bear well
And so merry let us be.
Let every man drink up his cup
And health to the old apple tree.


Or this?
Here we come a-wassailing among the leaves so green;
Here we come a-wandering so fairly to be seen

Chorus:
Our jolly wassail, our jolly wassail,
Love and joy come to you,
And to our wassail bough;
Pray God bless you and send you a happy New Year
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There is no Rose
Lo, How Rose
Green Gro'th the Holly
The Holly and the Ivy
Sans day carol (The Holly bears a Berry)
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Good Luck to the Barley Mow
The Barley Song
"Oh the wheat is like a rich man that's sleek and well to do
And the oats are like a pack of girls
Laughing and dancing too
While the rye is like and old man that's sulky mean and small
And the ripe and bearded barley is monarch of them all"

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Scarborough Fair and variants
Sweet Thyme, Let no man steal your thyme,Flowers & Weeds, Seeds of Love etc

Another one I really like is the "Gairdener Child"

Songs with Roses & Thorns

Best- Julia