ohhh the buying everything bug is a good shout I never considered that... thanks for letting me know about bugs and I'm glad you like poison ivy I was proud of the idea :)
its a very nice plant i can say but i have a feeling that the fact it replaces surrounding plants constantly is the reason for the intense lag, it makes the plant fully unusuable because it ends up needing to be careful or bricking your run, i do really like the game tho and enjoy the progress, id be happy to play more updates and report any issues id encounter