The event lasts from 16-26 March at Meadow Croft Garden Centre, in Battlesbridge, Essex.
As in 2016, the will be no associated British Protected Ornamentals Association event.
The 2016 winners were:
Joint first: Viola Bel Viso Wedgewood and Viola Deltini Rose Pink
3. Viola Sorbet Phantom
4. Viola Rocky Blue with Yellow Face
5. Viola Deltini Yellow and Purple
6. Viola Corina Terracotta
7. Viola Rocky Orange with Purple Wing
8. Pansy Colossos White
9. Viola Sorbet XP Marina
10. Viola Bel Viso Tiger Eye Yellow
Viola Bel Viso Wedgewood