Get readings about Willow and Poplar aeroallergens.

Tree pollen is dominant in the spring.
Willow pollen season extends from March to June.
Poplar pollen season extends from February to June.

• White Willow (Salix alba)
• Weeping Willow (Salix babylonica)
• Pussy Willow (Salix discolor)
• Crack Willow (Salix fragilis)
• Black Willow (Salix nigra)
• White Poplar (Populus alba)
• Eastern or Common Cottonwood (Populus deltoides)
• Lombardy Poplar (Populus nigra)
• European Aspen (Populus tremula)

• Many of the ornamental poplars produce no pollen and are sterile hybrids.

• Willows flower in March and April. They are mainly insect- pollinated. It is not a strong allergen.
• Poplars, aspens, and cottonwoods are entirely wind-pollinated. These mildly allergenic trees bloom in April and May.