This means that it normally takes two growing seasons for it to complete its life cycle. The second year it produces one or two flowering stems with lots of white flowers that have four separate petals. May. The fruits are slender capsules 1-2 inches long. If you open one of the capsules, you ll find a single row of black seeds with ridged seed coats. It produces hundreds of seeds per plant.
Seeds can last for five years.
It is believed that the seeds hitch rides on the fur of animals like deer, horses, and squirrels. Eventually, they drop off and start new colonies of garlic mustard. People and flowing water can also help this invader spread. The plant flowers from May through early June. Fruits begin to ripen in mid-July and are spread through August.