https://micro-science.co.uk/plant-ti...-mixtures.html
https://micro-science.co.uk/plant-ti.../hormones.html
https://micro-science.co.uk/plant-ti...lture/ppm.html
If you have baby food jars I have some of the lids which fit, I can send you some if you like.
Agar can be bought from health food shops or online, lab grade agar is expensive though, but food agar is fine.