Use your slicer’s fuzzy skin feature on the cactus to make it look like the one in the picture!
I used green, orange and lilac PLA for the one in the picture, but you can use whichever you want.
The tolerances on the vase were made so that the cactus fits snugly with fuzzy skin enabled. I haven’t tested them without it enabled, but if you do and it’s loose, just let me know and I’ll post a modified model to account for it.
The one in the picture was printed at 1500% scale. haven’t tested how it all fits together at other scales.
The flower is kinda tricky to print, so if you’d just rather not have to deal with the hassle, you can print the cactus without the hole for it.
Made with Blender.