Island of Hawaii-Ragweed?
 

I am visiting from Sept 23-Oct 5 I have a severe ragweed allergy and as the ragweed pollen count starts to go up in Ontario, Canada, I suddenly thought is there ragweed on Hawaii? It won't affect our plans, just how much medication I bring
Thanks

Yes, there is ragweed in Hawaii.

You can get a daily ragweed pollen count by using one of the on-line weather reports like Accu-Weather