2024 Grow Food/Garden for Free Challenge

This is a spin off from the Garden Balance Sheet thread.   https://gardenandgossip.org/showthread.php?tid=2069
I've already said that I'm aiming not to buy any seeds this year and was mocked.   At the end of the year you'll see how strong my will power can be (or not). 

I'm sure most of us aim to be as frugal as possible in the garden so maybe we can share our tips and hints for economising in the garden. 
Apart from tools and structures, like GHs, most money is spent on seeds, plants, compost and feed.

Seeds we can save or swap. Seeds saving Guidance and Seed Swap events at https://gardenandgossip.org/forumdisplay.php?fid=57
Plants we can grow from cuttings or seed and grow, swap or sell. https://gardenandgossip.org/showthread.php?tid=478 https://gardenandgossip.org/showthread.p...t=cuttings
Compost we can make from all sorts of waste materials. https://gardenandgossip.org/forumdisplay.php?fid=75
Feed/fertiliser can also be made from a variety of ingredients. Apart from making comfrey tea and using the runoff from the Hotbin. I haven't explored this area much. I'll have a nosey around G&G for relevant threads. https://gardenandgossip.org/showthread.p...omfrey+tea