Talk:Modify Plants vs. Zombies/@comment-25472638-20190512162818/@comment-36101623-20190514021149

It is possible, although I dont know how.

There's a mod of PVZ that is 'Hard Mode' that actually changed the costs of some plants, for example the Potato Mine now costs 50.

PVZ Tools also has an option, while not permanent though, to change the sun cost of a seed. Perhaps you could base yourself from here and break your head with a hex editor or something to change their cost. Good luck if you wanna try to!