Google "sloe and apple jelly" /conserveOther than Sloe gin is there any other food or drink ( non alch ) uses for sloes?
Bushpig
Blackthorn leaves were dried and mixed with tea leaves in what became known as Chinese tea. Despite their sour taste the sloe is made into a paste is excellent for whitening the teeth and removing tartar. The thorns provided blackthorn ink, the bark a red dye for wool and linen.