On Weeding Day Leif will be in the plaza

If your town has any weeds, he'll give you a piece of the flower furniture set once they're all gone. If your town has no weeds, he'll suggest a topiary pwp.
In the flower furniture set, one of the 4 pieces can be awarded from cleaning weeds in your own town. Leif will only give one of the other 8 pieces if you're cleaning weeds in someone else's town. (Although I hear you need to clear at least 30?)
I got all this from this guide!
https://www.neoseeker.com/forums/50570/t2009685-weeding-day-guide/ It was my first weeding day this year so I was pretty confused at first xD