Video Highlight: start of the region-wide pollination of grasses 2024 in Vienna
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Region-wide pollination of grasses in Vienna is possible under favorable conditions. Here you can see one of many flowering field meadow foxtail grasses, that already pollinates and releases the pollen in the air.
Video Highlight: main pollination period of birch 2024
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Therefore, constant high pollination is expected under favorable conditions. Here you can see birch catkins, that already pollinate and releases the pollen as yellow cloud when slightly touching them .
Video Highlight: first pollination of birch 2024
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The first birch trees reached their readiness to flower during the week of 11th of March 2024.
Therefore, first pollination takes place under favorable conditions. Here you can see a birch catkin, that already pollinates and releases the pollen as yellow cloud.
Video Highlight: flower of alder 2024
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Alder already exceeds hazel concerning intensity of pollination in Vienna. Black alder shows many catkins this year as can be seen in the video. Therefore, we expect an above average alder pollen season in intensity for 2024.
Video Highlight: full flower of hazel 2024
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At the moment you can observe hazel catkins in nearly every stage of its flower: still closed, flowering and even faded. The hazel shrubs, like here in the video, show a fair number of catkins this year. But no hasty worries: we expect a hazel pollen season below average in intensity for Vienna, also because the hazel tree as frequently planted city tree shows low numbers of catkins.
Video Highlight: pollination of the Spaeth´s alder 2023/24
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Brief review: the start of the flower was later than usual, the readiness to flower was reached shortly after Christmas and was followed by a rapid start of flower. The mild weather of the last week in the end of the year 2023 has accelerated the flower. The catkins have finished flowering already within the first week of January.
Background: The Spaeth´s alder is a hybrid that flowers around Christmas and occurs only planted in Vienna. Therefore, it does only cause local and not widespread, measurable pollination.