Seedball
A firm called -
https://www.seedball.co.uk/
has come up with a new twist on an ancient technique for boosting seed germination. They have encased seeds in a small ball of clay, compost and chilli.
They say the clay deters predators and degrades once wet to let the seeds germinate, and the chilli powder deters slugs and snails.
They do Seedball tubes, or a Classic tin collection, and each pack has a 2 & half years shelf life.
Have a look, see what you think.