Hi Becky,
Actually, my roto-tilling is for two new raised beds (175' x 5') that we built last year to accommodate the new cultivars that we've ordered for this spring, and some seedlings that will hopefully germinate and grow. I have to do some major weeding and tilling to get the beds ready for the new plants that will be arriving in May/June. We are surrounded by fields and find that our beds seem to be a magnet for weed seeds.
Our bloom season here (SW Ontario) will start with a couple cultivars blooming in mid to late June, and will go until frost in November. Most will be early July to late August and that's it. I've started carefully tracking rebloom characteristics, and find that most registered rebloomers do not rebloom here (probably about 60% don't). Of those that do, most have scapes that are shorter, and are much lighter on bud count than the first scape.
In 2014, our best reblooming daylily was - believe it or not - Siloam Breathless! It is not registered as a rebloomer, but I actually cut down a number of blooming scapes in November.
This year, I've tried to get a few "instant" rebloomers to see how those fare here in the "Canadian Banana Belt".
Cheers