Its so easy! I saw kits online but then thought I would have a go and it was so easy....and a great activity to do with the children....its gets real messy so perhaps best to do outdoors or spread out a load of newspaper!
Seed balls are, first and foremost, a way to protect seeds - the clay exterior prevents rodents from eating the balls, the drying process protects them from rot, when exposed to sufficient rain, the absorbent compost helps to provide the right amount of water for germination for most seeds
You will need;
1. A pack of wild flower seeds
2. Potters clay
4. Cookie cutters - optional
Simply mix up a lump of clay, with a couple of handfuls of compost and all your seeds ( I did all this on a wipe clean surface ) and squash together using a couple of spoonfuls of water if the whole mixture gets too dry....I kept on kneading the mixture until it came together.
Once in a suitable crumbly paste I squashed lumps of it with the heel of my hand and shaped into rounds and pressed a little flower into each surface.
They dried overnight and looked a bit like biscuits! They're now are ready to go scattering!
A new book called Seedbombs: Going Wild with Flowers by Josie Jeffery introduces this concept to modern readers, but the idea of seed bombing first germinated in Japan with the ancient practice of tsuchi dango, which translates as "earth dumpling". The idea was again popularised in the 20th century by Masanobu Fukuoka, an advocate of "Do Nothing Farming". And there have even been proposals in recent years to adopt the idea on an industrial scale to repopulate vast areas with trees.