Respectfully, #3 is absolutely in the chicory family, you can tell by the arrow shaped leaves that are beginning to develop from a “round” base plant. Probably catsear. I don’t usually guess at an exact chicory until it’s a decent size but it’s one of them.
Same for the fourth, it’s a sow thistle. A little purple and bristly yet, as it’s still young.
And same for the most recent picture above, which is likely hawksbit.
It certainly is confusing to get them exact. For new owners, I think it’s easist to wait for them to flower to be sure they are chicories. All the common chicories will have yellow flowers that are arranged in a sunburst pattern, the leaves will have “saw” toothed edges like this dandelion:
Sow thistle flower:
Catsear flower:
Same for the fourth, it’s a sow thistle. A little purple and bristly yet, as it’s still young.
And same for the most recent picture above, which is likely hawksbit.
It certainly is confusing to get them exact. For new owners, I think it’s easist to wait for them to flower to be sure they are chicories. All the common chicories will have yellow flowers that are arranged in a sunburst pattern, the leaves will have “saw” toothed edges like this dandelion:
Sow thistle flower:
Catsear flower: