**5. Conclusions**

The results of this study showed that *S. minor*, *S. arvensis*, and *T. o*ffi*cinale* would be interesting species for producing specialty crops like microgreens and baby greens. Actually, not only did they achieve competitive yield, but also demonstrated that their contribution to the dietary intake of macroelements, microelements, and non-nutrient bioactive compounds would be comparable, or even larger, than that of vegetable crop species. Among the species, *S. minor* showed the highest amounts of Mg, P, Zn, Mn, and Mo, and *T. o*ffi*cinale* microgreens stood out by Fe content. Between microgreens and baby greens, the latter were often richer in minerals and antioxidants. On the other hand, the wild greens showed high amounts of nitrate, which could be a limitation for commercialization, and the presence of some metals potentially detrimental for human health. Although micro/baby greens are normally consumed in small portions, and the calculated HRI values were far below 1, such a finding suggests caution. Therefore, the aspect of the accumulation ability of wild ruderal species should always be considered prior to introducing them in cultivation, and, in this case, strict control of possible sources of chemical contamination (water, salts used to prepare the nutrient solution, and substrates) would be necessary.

**Author Contributions:** Design of the study, A.L. and P.B.; Performing of the experiment, A.L. and A.O.; Data collection, A.L., A.O. and P.B.; Chemical analysis: A.O., R.B. and A.F.; Data analysis: A.L., A.O. and P.B.; Writing, A.L., R.B., A.F. and P.B.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
