Allium vineale reproduces via three kinds of propagules, sexually produced seeds, underground asexual offsets, and aerial asexual bulbils; thus I was able to test for shifts in the allocation of resources to different reproductive modes as well as overall effects of mycorrhizal colonization on plant fecundity.
Some varieties, such as tiger lilies, produce little bulbils up the stem that can be planted and grown in a cold frame to produce more flowering-sized bulbs in a few years time.
Leeks produce bulbils at their base; leave these to grow in place to produce an ever-expanding clump of thin leeks, or separate and transplant bulbils to create a standard crop.