They want to hear from people growing their own, particularly those that save their own seed from favoured varieties no longer available to buy or plants bred at home.
The project will bring together a collection of Welsh varieties, which will be available to growers to try.
DVSS aims to preserve the diversity of vegetable varieties, and is looking for those that are well adapted and add to local heritage.
The project is funded by Glasu, a joint Powys County Council, EU and Welsh Assembly initiative to aid rural development.
To get involved, visit www.dyfivalleyseedsavers.org.
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