When should I start using Nasonex for allergy prevention?

I read that you should start using it 2 to 4 weeks before the pollen season starts, but when does the pollen season start in the U.S.? I live in Indiana.

When should I start using Nasonex for allergy prevention?
I am not sure what the weather is like in India but in the United States The pollen season can last from January through October. Generally, the further north you live, the later in the spring it starts. In southern states, the pollen season can begin as early as January. I hope this helps in any way.
Reply:Use It when u feel your allergys coming on..
Reply:less is more..
Reply:just start using it when your symptoms kick in.
Reply:For the west central Indiana area the tree pollen is a medium risk right now. Weed, and grass is not active at this time. Use the link below to enter your zip code to find the pollen forecast for your area. The link to enter your zip code is about 1/3 the way down the page under:

Allergies %26amp; Pollen Count by The Weather Channel



Personally, I use Nasonex year round as I have both indoor and outdoor allergies.
Reply:around may and april
Reply:when ya nose getts stuffy and you start sneezing and stuff like that ya kno??