The second one looks like Nettles and the third looks like Solidago, Goldenrod.

The first one is a weed but I don't remember the name. It's very interesting, it sends up a central stalk and the leaves unfold from it in a whorled fashion, it's quite unique. Then it starts blooming little, yellow, 4 petaled flowers and looks more like a weed.

Thank you, Jeanne. I do remember growing Solidago last year but my notes were not up-to-date - failed to say where I planted them, but this would be about right. And your description of the weed and how it grows reminds me of an 'unknown' I grew to adulthood in my garden last year, and did not realize it was a weed until it flowered. Must remember the look for next year. Now the nettle ID really is scary. I have not had nettle in my garden until about 15 years ago when it came with a load of soil, ut we got rid of it back then. In addition, these seedlings are in one spot like something dropped them there. Do nettle seedlings not have stinging powers? I have handled at least 8 of these seedlings, transplanting them into cell packs with my bare hands with no ill effects. At first the leaves (cotyledons) were more round, then took on this spear shape. I'll see if anyone has other ideas. You identifiers are all amazing!!!

I solved Number 2 myself: it's Verbena bonariensis. I do remember having one of them show up last year, but I forgot about it as it was just one plant. I wintersowed some myself this year, and they look exactly the same as my winter sown seedlings. I guess I'll have to be very careful with them.

Solidago decides upon planting itself in your garden - not the other way around! It is a wonderful native plant if you have the space for it to spread. Otherwise, you may wish to move or remove it.

FataMorgana