Wow, there will be a huge amount to learn about ID'ing plants to pursue that purpose.
1, 2. Melilotus officinalis, yellow sweet clover, a weed.
3. Melilotis alba, actually a different species, not the same plant turning white. White sweet clover - a weed.
4, 5. Lactuca sp.
6. Echium vulgare, a weed.
7, 8. Verbena stricta.
9, 10,11. Hibiscus trionum, flower-of-an-hour.
12-14. Hypericum sp.
15-18. Carduus nutans
19-21. Leucanthemum vulgare, ox-eye daisy.
