How can i get golden-star onion?

[Wasaki]

I need to make 5 golden-star hamburger but wants me golden onion but i cant find any golden onion and cant make it.There is no gold onion seed as well. I only found 3 golden onion seed in the dungeon.Any ideas?

[scoorh]

buy base seeds from farmer and then use craftable fertilizer to upgrade them by using it on your farm plot

[Indeed]

get tech to unlock Quality fertilizer II, and remember to use it every time you plan to plant any leveled crops.

quality fertillzers are actually cheap, you need ash (from burning bodies), toxic solution (red mushrooms, get some North of your home) and life extract (from hearts or maggots). all of the ingredients are easily obtained.

[LotusBlade]

You might also want to create prayer for nature to improve your crops yeild.

[scoorh]

does that prayer really increase yield? i thought that it only reduced growth time

[Indeed]

During my playthrough, I observed that the prayer (golden level) did nothing to yield or quality, and hardly noticeable to growth speed. Not sure how that works.