The Ipswich seed company has signed a deal with Prince Charles' charitable food operation. The company hopes that this agreement will expand the seed market.
T&M UK retail sales manager Neil Sharpe said: "We expect new consumers to buy the Duchy range. This is a no-brainer for garden centres to buy.
"Sales into garden centres have been great for us. This is the most complete organic range on offer."
The range will be in around 500 garden centres this September. Around 250 have already bought the range. Thompson & Morgan presented it to Wyevale last week but will not sell through supermarkets and sheds.
Duchy Originals communications manager Meg Elvin-Jensen said: "The organic market is growing by 30 per cent year on year and there is a continued trend towards grow-your-own.
"Allotments are trendy so this move makes perfect sense. People are more concerned about where their food comes from, the food miles and locally sourced food, and what can be more local than growing your own?
"This is aimed at the novice and the experienced gardener," Elvin-Jensen added.
Packets are composed of 75 per cent recycled FSC paper.