Martin Frobisher is a lovely rose, John Davis is nice, Henry Hudson is lovely and William Baffin is a reliable monster. I like Therese Bugnet as well. In your zone they should give reliable performance where others are too tender.

Here is a link that might be useful: martin frobisher

Quadra: steady, well-formed, deep red blooms on a totally healthy and hardy (here in z5) plant.

Both of those look like keepers. Martin Frobisher looks more like an old European rose while Quadra seems to have somewhat wicherana leaves.They sell Canadian Explorers around here a lot. Most are getting terrible care, which is what probably turns me off. You see them at lawyer's offices and parking lots, still with last year's dead canes in August. They dump gravel mulch around them and walk off.
This red rose I keep seeing around is a blooming fool. It's doing okay in spite of lousy treatment. Loosely double and scarlet red. There are so many similar ones that I'm just not sure which one it is.
I can't recall the antique rose web sitting down to discuss Canadian Explorers in any depth, though it must have happened sometime.

I have begun to appreciate Canadian roses more and more. 'Cuthbert Grant' is a very hardy red rose and has a graceful form. It's also very healthy. Twice blooming when established. 'John Davis' is a short climber--romantic form and nice shade of pink, neither insipidly pale nor harshly bright. Repeating and healthy, not many thorns, very hardy. 'Prairie Joy' is a very double pink shrub that reblooms when established. It has the same look as an English rose, but is hardier. Can get some BS later in the season, but generally healthy. All these have a slight fragrance. Can't comment on any others from personal experience, but saw 'Lambert Closse' at a public garden a while back and was very impressed. It's hard to find, for some reason.

I've been growing LAMBERT CLOSSE for 4-5 years now, and have somewhat mixed feelings about it. It's a really good re-bloomer--which is nice--when the rest of the garden is taking a rest, I can usually count on LC to give me at least a few blooms.

Bloom color is attractive--med. pink/light pink blend. Unfortunately, the bloom can look rather muddled at times--not "shapely" at all most of the time. However, if you put the rose in the background where it is not usually closely examined, the blooms still look quite attractive.

So far, I'm having trouble with the overall shape of the bush. Either it is just simply a rather shapeless bush, or I haven't figured out the correct way to prune it in the spring. Right now it is suddenly putting out some rather long canes--maybe 7-8 ft long. Before that it seemed more like a 4-5 ft bush--or maybe my pruning kept it at that height. When I bought it, I did not think it was supposed to be a taller shrub--but maybe I was wrong.

It's got good disease resistance and no hardiness problems here in my Zone 6.

I have no plans to get rid of my LC, but am glad I moved it towards the back of my property where I most often enjoy it at a distance.

Kate

'Champlain' is loosely double and scarlet red.

I really love John Davis. It's literally smothered in blooms for it's first flush, and it repeats throughout the season. It had a little PM late in the season for it's first couple years, but was clean as a whistle this year.

{{gwi:253970}}

Wow, Kristin, gorgeous garden, gorgeous color combo, gorgeous roses, gorgeous companion plants. I think I like it. Do Canadian Explorers like Florida?

Sherry

Sherry, Canadian Explorers are crossed with rosa kordessii and I'm not sure how Kordes got his own rose, exactly. Theresa Bugnet isn't exactly a Canadian Explorer, though bred in Canada. She is an amalgamation of all the native northern roses Bugnet could find.
Considering Explorers were crossed with tea roses to get the repeat and how they survive in parking lots here, they might do just fine in Florida.
Mike, Champlain is the right color but I think this one has more petals. Maybe not.

Alex McKenzie is an excellent repeat flowering red. I have many mature explorer roses and find the older they become the better the repeat. 12 yrs. and counting....

It finally hit me that what I call Canadian Explorers are really a lot of different roses, mostly bred in Canada. They come here from Lawyer Nursery, which is a big wholesale nursery here in Montana.
I'm guessing that the one I see around town a lot is Hope For Humanity. If that's the one, it's giving out hope in every parking lot in town.