Wheat symbolizes the fertility of the earth, renewal, rebirth and abundance. It can also represent the long and fruitful life enjoyed by the deceased.
To Christians wheat represents the body of Christ, and is therefore symbolic of immortality and resurrection. When paired with grapes it is a symbol of the Eucharist.
It is sown in weakness
It is raised in power
Our nails are drove
Our work is done.
The busy world is hushed
The fever of life over and our work done
Till the day break
Behold the pilgrim as he lies with glory in his view,
To Heaven he lifts his longing eyes and bids the world adieu. 1886