Each bit of fluff has a seed or spore but there are soooo many of them and they just get everywhere. The windows and doors have been left open on warm days but none of them have flyscreens so the fluff has been filling the house. It's a pain to clean up too. It's difficult to get it all and floats around at the slightest breeze. Whispy stuff it is. Kinda fun to walk across a frosty looking yard though.