Yes, I already do have some predatory wasps, but I'm going to be hitting... Arbico I think it is, for a whole suite of beneficial insects.
That's some good info you gave there, Mr.Metal, thanks! I may discover that my local Lowe's carries it. I should say that prior to Lowe's coming in, all we had were some small local hardware shops, and if we needed the sort of thing or prices one gets at Home de Pot, then we'd go down into Folsom, about 45mi away. So, getting the Lowe's (and the 'new' Safeway, and a Staples) was a pretty big deal out here. Wanna find where all the locals at? Go to Wal-mart. But, not during dinnertime, after school is when. Or, go to Costco in Folsom and do the rounds, we run into lots of locals doing that.