Coming up in some pots on my balcony. Very tiny flowers.
horrible VERY COMMON MI weed... do not let it go to seed.. or you will have hundreds more..
change out your potting mix every season.. to avoid weed seed accumulation... perhaps you didnt do that this year???
most weed seed is air borne.. third floor means nothing to them..
and the other two thirds..lol..shoot out the back of a bird pre fertilized... and 3 stories is.. again.. nothing to them..
so there really isnt much mystery... there is a reason they are called weeds
ken
ken_adrian Adrian MI cold Z5