As seen during our appearance on BBC Gardeners World we use garlic wash as a slug deterrent on the nursery. Please find below the recipe that we use and find very effective. The quantities aren't exact and you can always alter them as you wish.
Open a window because it's going to get garlicky!
Dear Customer, we are still sending orders as normal. There is however a slight delay on our usual speedy service due to delays with Royal Mail. Please bare with us as we process your order. Kind Regards.