Return to the Weeds Forum | Post a Follow-Up

 o
Ragweed - pollination

Posted by cookie8 zone 5 ON (My Page) on
Fri, Aug 5, 05 at 11:48

Does anyone know when ragweed "comes into season" for allergies, I guess when it pollinates? Thanks


Follow-Up Postings:

 o
RE: Ragweed - pollination

Late July -mid September maybe earlier in Canada or mountains.

Generally right before the goldenrod starts to bloom.


 o
RE: Ragweed - pollination

Ragweed flowering is controlled by daylength. In Southern Ontario it starts to bloom about August 15. Start taking Claritin now so you will be ready!

Those allergic to it will have problems not when it pollinates but when it producing pollen, ie when it flowers. Do not confuse ragweed with goldenrod. The Goldenrods bloom in August and September, about the same time as ragweed. Because ragweed is a small plant with tiny non showy flowers and goldenrod is taller with lovely yellow flowers, goldenrod is often blamed for allergies.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Weeds Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here