It's an Avocado plant!

Growing from a stone i put in soil, don't remember when.
Actually didn't remember at all and had to ask Google lens when I spotted the plant. 
I just read you can make tea from the leaves.
Perhaps I should,  I doubt the plant has a survival chance on my balcony in winter.

PS Its stem was some 30 cm high when I discovered it the other day. Seems to like the heat.

21:10; 28°C