Hi love the mod, it looks like it's incompatible with Combo Technology https://mods.factorio.com/mod/Combo-Technology

Failed to load mods: quality-plants/data-updates.lua:71: attempt to index local 'minable' (a nil value)
stack traceback:
quality-plants/data-updates.lua:71: in function 'update_mining_results'
quality-plants/data-updates.lua:111: in function 'generate_plant'
quality-plants/data-updates.lua:186: in main chunk

If its difficult to fix , then no stress, id rather use your mod than the other in a pinch.
thanks for any help you can give

Thanks for the report, looking into it

So I fixed the crash pretty easily, however it comes at the cost of the seed crystals not being affected by quality. I belive it'll be possible to make this work, but it would be a big undertaking. I don't have all the time in the world anymore, so I wanted to get it in a playable state for now, and revisit it when I have more time.

that's perfect thankyou so much, don't stress about the crystals , if its playable I'm happy