"There's spring time, where you have the tree pollen. Summer time, where you have the grass pollens. And then there's the fall time when you have the weed pollen.”
This sequence is remembered by the mnemonic TGR MI DC/DC ("tiger with an MI went to DC").
Pollen calendar: TGR MI DC/DC
Ragweed and weed pollen
Indoor allergens - DC/DC - Dog/Cat and Dust mite/Cockroach
Pollen-producing plants (weeds and trees) in Omaha, Nebraska
Clinical review: ABC of allergies, Summer hay fever. BMJ 1998;316:843, figure.
Allergy Season Year Round. WTOC-TV Savannah.