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Pollen: When will I get Hay Fever in Australia?

July 15, 2013 by Jon 6 Comments

Plants with Pollen That Cause Hay Fever in Australia

When am I likely to get hay fever (seasonal allergic rhinitis) from pollen in Australia?

Pollen seasons can cause hay fever & asthma almost year round in parts of Australia.  Exposure to pollen is very difficult to avoid outside the house throughout a lot of the warmer parts of the year.

Grasses (particularly improved pasture grasses) that were introduced for livestock disperse vast amounts of airborne pollen, as do weeds. Not a lot of people know that troublesome non-native plants are usually more of a problem child than the natives; their pollen is more allergenic.

Grasses start pollinating in Spring into Summer; trees pollinate in the last part of Winter through to early Spring and some weeds pollinate from August through to May.

Atmospheric pollen loads are worse inland, because there are few barriers to wind borne dispersal.

I’ve compiled a table that lists some of the most allergenic plants in Australia, in terms of airborne pollen. The table is not complete and will be added to as more allergenic Australian plants come to my attention. Please feel free to add any plants that you’re aware of in the comments section and I’ll add them to the table.

[table id=2 /]

References:

Atlas of Living Australia

Department of Agriculture & Food WA

Dr K. Baumgart ‘Allergic Rhinitis’ Medical Observer

Food & Agriculture Organisation of the United Nations

Bahia Grass

Couch Grass

Johnson Grass

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Filed Under: Hay Fever (Seasonal)

Comments

  1. Dan Piercey says

    August 14, 2014 at 12:08 am

    It appears that the above article wrongly refers to Lolium rigidum as Rye Grass (twice). It should be Ryegrass; Lolium rigidum is correct. This will lead to much confusion among readers!

    Reply
    • Jon says

      August 25, 2014 at 3:18 pm

      Thanks, Dan. This is fixed.

      Reply
  2. SallyAdelaide says

    May 12, 2017 at 11:22 am

    Thanks Jon. The first really well designed web reference I have found.

    But my seasonal rhinitis begins in March. Is still active in May. Actually goes to December some years but that might be different allergens.

    So the only months I never have it are late December to mid March. Maybe someone out there knows what emits allergens from mid March in Adelaide?

    I used to prevent it by eating honeycomb from bees but that isn’t working this year. Theory is the bees have eaten the allergen and I eat it rather than inhale it, thus getting my body to tolerate it.

    Reply
  3. SallyAdelaide says

    May 12, 2017 at 11:32 am

    Ah. Maybe wintergrass? https://www.allergy.org.au/patients/allergic-rhinitis-hay-fever-and-sinusitis/guide-to-common-allergenic-pollen/266-annual-blue-winter-grass shows season April to December but I had to spray wintergrass flowering in our lawn in late March this year.

    Very grateful for the trouble you have gone to in your website, Jon. Previous post 2014, now 2017, hope you are managing your own allergies OK.

    Reply
    • Jon says

      May 15, 2017 at 2:23 pm

      Welcome back and thanks very much for the lovely feedback, Sally. I’ll take a further look at the honeycomb and wintergrass and good luck with your allergies yourself.

      Thanks,

      Jon

      Reply
  4. A L Inglis says

    January 5, 2025 at 11:31 am

    Plants I am allergic to, in addition to Loleum rigidum (and told on testing also Bermuda grass and Common Couch) that I have worked out from being a volunteer bush regenerator, are: Sorghum halepensa (Johnson grass), Digitaria sanginalis (summer grass), Poa annua (winter grass), Echium plantagineum (Paterson’s curse) and Tradescantia albiflora (Wandering Jew) – contact dermatitis. As my allergies are increasing in number over the years, there may be more! The fact that few people are gardening these days means weeds are increasing at an exponential rate in our cities and towns.

    Reply

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