This is a photo of Cobain the cactus - in Real Life:
I cropped out the other bits so it was just the cactus. I prepared this as a 512 x 512 image for uploading to Second Life.
Next I found some random 8-sided mesh/sculpted tree and retextured it with my cobain.png texture. You can find many free sculpted trees on SL Marketplace if you don't have one to start with. If I had more time, I could probably have used Blender to bake the plant sculptie/mesh myself and then imported it into SL instead of repurposing some other plant mesh. I'm not building it in order to sell it, so the permissions don't really matter to me at this point. Finally I created a brown pot for the bottom from a tube, added a circular disc textured with soil and linked them all together.
And so by the end of one pomodoro, I had a copy of Cobain the cactus - in Second Life: