All possibilities for two tables?

Hello,

I have two tables: Rootstock and Scion. The Rootstock table is a list of grapevine rootstocks. The scion table is a list of grapevine cultivar and scion combinations. Each unique scion combination is listed by row. Together a cultivar and clone combination makes a unique scion which can be combine with any rootstock.

I would like to merge these two tables into one master table where every combination of rootstock and scion is listed by row.

Can anyone help guide me on how best to go about this? I thought about copy and paste to just get this done, but in time I will likely have to make edits to the list, and I would prefer a more automated system.

Thank you,