Get aeroallergen readings for Ash.

Important genera:

Ash (Fraxinus), Lilac (Syringa), Privet (Ligustrum) and Olive (Olea)

Tree pollen is dominant in the spring.
Ash, lilac and privet pollen season extends from January to May.
Olive (Olea) is not indigenous to Missouri.

Ash, Lilac, and Privet trees in Missouri:

• White Ash (Fraxinus americana)
• Green or Red Ash (Fraxinus pennsylvanica)
• Red or Pumpkin Ash (Fraxinus tomentosa)
• Blue Ash (Fraxinus quadrangulata)
• Lilac, ornamental (Syringa vulgaris)
• Common Privet (Ligustrum vulgare)
• California Privet (Ligustrum ovalifolium)

Facts about Ash, Lilac, and Privet

• Privet is an evergreen with glossy leaves used in landscaping and as a hedge and blooms from June to July.
• Lilac is commonly planted for ornamental purposes.
• There are about 65 species of ash with 13 species native to North America.
• Ash is especially common in the Midwest.

Ash, Lilac, and Privet Allergenicity

• Privet is insect-pollinated and blooms from June through September. It is not an important allergenic plant.
• Lilac flowers from April to June.
• Ashes are entirely wind-pollinated and the pollen is moderately allergenic.
• Ash sheds copious amounts of pollen and generally flowers from March to May, while two species flower in early and late summer.