Can someone please id it for me? Is it an annual weed? What is the best way to lower their numbers? I've pulled many from my lawn about 3 weeks ago. However, I didn't remove the ones that were 1 inch tall since the roots break.
Prickly lettuce. It's an annual.
Pull and discard/compost before the seeds blow everywhere or you'll have a bazillion more next year.
Awesome! Am I correct that I should only be concerned with those with seed pods and about to flower like my second picture?
In a month, we'll get our first frost. I hope, they'll get killed.
Just mow them off when you mow the lawn. That will keep them from going to seed and their numbers will soon diminish if you prevent seed production.