I sucessfully managed to revive 2 vials of WLP 565 saison yeast that was a year old!
I started small and got 2 one litre starters going and when they started to show some life
i added another 2 litres of wort to each starter, when it finished it happily fermented a
full 1060 batch down to 1009, patience and a bit of TLC :thumb: