The organic food and farming company has seen profits slump from £1.53 million to £57,400 in a year as sales of its luxury food products have been hit by the recession.
The Prince set up Duchy Originals in 1990 and named it after the Duchy of Cornwall estates, which are held in trust by the Prince of Wales.
Waitrose is already the biggest High Street stockist of Duchy Originals, accounting for about 40% of sales.
It is expect to take on exclusive sales for the brand.
This spring, Duchy Originals overhauled its packaging across its range aimed at displaying its provenance.
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