Kochia is in the chenopod family of weeds, along with Russian Thistle, Lamb's Quarter and other weeds common to the Grand Valley. It grows throughout the Grand Valley beginning in June and starts to release pollen in August, peaking in late August and September. All of the pollens in chenopod family are nearly identical under the microscope and to the immune system. So, if you are allergic to kochia, then you are also allergic to Russian Thistle, Lamb's Quarter, etc. This can result in severe symptoms during late summer and early autumn.