Hi there,
I created a custom component with a graphical user interface to add pollen forecasts provided by DWD Deutscher Wetterdienst (Pollenflug-Gefahrenindex) to Home Assistant:
The component is available on HACS.
The component add one sensor per pollen type.
Lovelace Example (icons are not included):
Enjoy
mampfes
The component is working great.
But I don’t see the icons in lovelace (mdi:flower-pollen). Is that icon new and not yet included in the current version of the iconset?
Thanks for the feedback.
Yes, mdi:flower-pollen is listed on materialdesignicons.com, but has not yet made it into Home Assistent. The newest HA version which has been released today also contains an update of materialdesignicons - but I have not yet checked if the icon is now included.
mdi:flower-pollen is included in HA 2021.10 
Great Integration. Thanks for providing it.
Where can I get the icons in the example. They are not in the default set