The blue in the 1st pic is centaura cyanus aka annual bachelor button. The tall yet to bloom appears to be cosmos bipinnatus aka annual cosmos. The red vine is lathyrus odoratus an annual sweet pea. The last pic appears to be verbena bonariensis hanging out over the side. You can indeed collect seed from these. Some of them will automatically reseed themselves if had been ground planted.

I thought it looked very much like Delphinium. Thank you.

When you pull one of these weeds, if the roots smells like carrot, it is Queen Anne's Lace. If the plant is hemlock, it will have a replusive musty smell sometimes described as smelling like a mouse. What does a mouse smell like? Normally, but I will not say always because there are some different species of QAL and they don't all look the same, the QAL has tiny hairs on the stems. The stems can be solid green or solid green with teeny tiny red pinstripes. The poisonous hemlock has some purple splotches on its stems. Some QAL, but not all, have a dark flower, variously described in different sources as red, maroon, black or purple, in the center of each flower cluster, but this can be iffy and inconsistent and is not necessarily a reliable indicator. The species of QAL that grows wild at our place never ever has had the oddly colored flower, only the creamy white ones. If you have the QAL, when the plants go to seed (don't let them!), the seed heads curl inward on themselves forming something that looks a little like a bird nest. Also, the poisonous hemlock usually needs wet ground to grow but QAL can grow in wet or dry ground. And, poisonous hemlock gets taller and more spread out, though the QAL flower heads will spread out a lot and have less tight flowerheads as the seeds mature, so the flower spread isn't always reliable.

yes, it totally could be. This house had a well tended garden, but in the last couple years I think the owner had some health issues, and we all know how fast weed can take over. I was curious so I let it go, one of the few I did let go. I can't see the leaves at all, they are under the cover of the hosta, and I don't think they are very attractive. But, that particular yellow colored bloom and flower shape seems to look nice to me with the lupine. I'd like to try and emulate that look with something with nicer foliage. If anyone has any suggestions as to what my bloom with the lupine and resemble that sort of color and light, airy, flower, I'd love to hear them. Thank you linaria_gw!