I have been following a nice chap, Lee Gardner, online who is very inspirational and creates video project diaries of his experiments in the field of growing and propagating on a shoestring.
I believe he is relatively new to gardening and started in order to help his ageing Grandad. His enthusiasm is infectious and he quickly gathered many followers. He loves finding ways to make do and mend and passes them on to the world through his YouTube videos.
He was responsible for my saving so many seeds and having a go at growing strawberries, lemon and orange tree plants from seeds collected from fruit bought from the supermarket.
I think I recall him saying that he has an arrangement with his local supermarket to take stuff that is past its best then he uses the collected seeds to grow new plants.
Take a look at his “project diaries” youtube channel at the following link