Homebase Own Brand 1kg Granular Vegetable Plant Food 100% Animal Bi-product Free.
Ive been looking for a vegetarian and organic plant food for ages - this one seems to be the closest I'm going to get and at a good price - I think its discontinued. Instore only but found in both stores in Norwich so think it should be available in most stores.
Also had ericaceous plant food for same price - slow release.
They also had their ericaceous liquid food in the pinky bottle for 72p.
Hope this helps someone.