Usually when my store bought onions starts to sprout, I plant them in a plastic container filled with water and get some green onion.
This time I decided not to wait until onion starts to sprout. I chose quite a large onion bulb and put it into a plastic container filled with water.
I keep water level just below the bulb, so that roots are submerged, but the bulb itself is above the water.
After quite some time (about two or three weeks) it started producing roots. Lot's of them.
After another few weeks I've noticed that the onion bulb itself has elongated a bit towards water. Obviously there's some "growing" happening.
So, lot's of roots, change in size, but no sprouts.
Could it be something to do with the onion bulb being very large? Or is there not enough humidity and warmth to start sprouting? Or perhaps the season is wrong (planted around October, and it's January now)? Or something else?