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View submission: What is this weed?
Aster seeds will float into your yard every season unless you just happen to be in a neighborhood of truly dedicated lawn farmers. I found it’s best to hand pull them before they get too big; easiest after a rain. Once they get big they become harder to pull and also tend to kill the grass underneath - which leads to *other* weeds taking hold as the aster dies back.
If you want to dial back the number of seed-based weeds popping up in your yard, you might want to consider using something like Nitro-Phos Barricade Granular Pre-Emergence Herbicide in around mid February and mid October for the Houston area.
There's nothing here!