u/yarmouthload

Growing for my first time and these shoots are out of control. I’m talking five feet tall but I’m curious when I should harvest the bulbs? Do I wait for the flower to bloom (kinda want to see them) or do I snip the shoot so more energy gets put into the bulb? When do I dig it up? Do I need to hang the bulbs and how do I prep some cloves to replant? Thanks I have no idea what I’m doing.