Rerun the cartridge to generate another tree - that's the fastest way to empty memory.
I made this for procjam, kinda late. It generates a tree over time using linked arrays as branch data. Each branch is updated individually when going through the whole branch data tree, linked array to linked array.
You can download the cartridge modify the parameters in the beginning of the code to unrandomize the generation. A set of different palettes is also there, uncomment one to use it. Don't forget to comment the "randomize()" line in the _init() though.
Have fun generating trees!