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Pollen and Mold Center
Cypress Family (Cupressaceae Family) - JUNIPER

Get readings about Juniper aeroallergens.

Two important genera:
Cypress (Cupressus) and Juniper (Juniperus)

Tree pollen is dominant in the spring.
Juniper pollen season extends from December to April.
Cypress pollen season extends from December to May however, Cypress is not indigenous to Missouri.

Juniper trees in Missouri:
  • Red Cedar (Juniperus virginiana)
  • Common Juniper (Juniperus communis)
  • Ash Juniper or Mountain Cedar (J. asheii, J. mexicana, J. sabinoides)
Facts about Juniper
Juniper allergenicity
  • Most species of juniper produce copious amounts of pollen which can be carried long distances by the wind.
  • Shedding of pollen occurs late in the fall, mid-winter, or early spring.
  • Juniper is the most significant allergenic offender in the cypress family.
  • The juniper pollen is very buoyant and is smaller than pine pollen, but junipers have more toxic pollen than pine.
  • Exposure to their pollen can be heavy if used in landscaping near doorways.
  • A juniper with berries will not produce pollen.