A really useful object - so much better than sticking toothpicks in the stone. I've made it my Thing of the Week on http://3dgeni.us so do check it out!

For those of you having difficulty starting growing: clean the pit carefully, wrap the clean pit with wet paper tower, put in a zipper bag and leave above the fridge (for the heat) for a few weeks. I think 80% of them started growing when I tried. Once the root is out, you can use the popular toothpicks method or use this thing or simply grow it in the ground. In only about 10 years you'll have fruits!

This is crazy. I was designing this very thing when you posted it. It was on paper for me. But thanks! I have a nice avocado plant that I did via luck.. I just planted it. However, I am now using toothpicks but its not working. I have ordered a heat bed which I think is needed here in MD. But thanks I will post some photos of my plant / setup when I print mine.

Riley

I just had an idea, you always have to keep the water topped off to assure the pit is in contact. What if something like this was printed hollow or near hollow (small infill) and allowed to float in a larger container. As the water level drops from evaporation the device would drop as well assuring the pit would remain in contact with water.

They always grow.
PLA plastic is made of starch and consumed in outdoor conditions as far as i know.
you can plant it with the plastic.

Okay I do love silly things like this but uh... isn't it a bit more practical, not to mention better for the environment and the avocado pits, to just use a few toothpicks?

I'm gonna try a few of these :) Do you get them to grow ? Tried a few years ago with the 3 toothsticks over a glass of water but none started growing...