Plum Perfect has very clean foliagefor me. Not much scent. sweet Mademoiselle has strong fruity fragrance. Desdemona is healthy and fragrant too but smaller blooms than PP and SM. Some of Earliest SM blooms can be huge.

Ohhhh...I need to look into plum perfect and sweet madamosile...I have Desdemona and she is clean, if pp and sm have bigger blooms, they go my list! Thank you.

The foliage all star here no spray is Kosmos - for both beauty and health the entire season. Lots and lots of blooms. Thank you Peter K. for your recommendation. Some balling in wet weather. Needs room ( width; somewhat sprawling and not very tall). A little fragrance for me. Rabbits like it.

Only one I have is Quietness. If black spot is not a problem there you will love it! If it is it will be a spot magnet. The plant gets quite large even here in Michigan where I have to cut it way back in the spring and the blooms are gorgeous but not a lot of fragrance.

Out of your list I have Olivia and Roald Dahl. Both are extremely clean, especially Olivia. Zero diseases, very vigorous, and very quick to repeat. Only downside in my opinion is that the flowers shatter quickly, like most DA roses.

i have seen quicksilver in a friends garden and it seemed pretty healthy too. Very floriferous and fast growing.

im getting Bathsheba for next year as well. I’ve been hearing only good things about her.

Thanks all. Taking Quietness off the list, everything blackspots here. Kosmos looks amazing, do the blooms hold up in the heat? the last two weeks have been brutal here:(

Last summer I couldn't spray my garden for black spot because I was going through chemo. I was surprised with a couple of Austin roses that stayed clean. Munstead Wood and Scepter' d Isle never missed a beat.

I am zone 10 South Florida where it is hot and humid. From your list I have Quietness and Plum Perfect. Plum Perfect stays much cleaner but has no scent. I have a couple of Quietness. One does well and the others do not do so well.... all are on own root.

SoFl has Wedding Bells. She raves about it. I think it is one of her better performers in our area.

@rifis (zone 6b-7a NJ), from where did you buy your Kosmos?

It was part of my first Palatine order, along with Poseiden and Sunny Sky. I don’t see it listed now though.

For reference: I am located in the Texas Hill Country, at a higher elevation, receive about 36" of rainfall annually, with lower humidity as compared to Austin near Lady Bird Lake, but definitely humid. Right now, I am growing approximately 40 roses in pots. When I purchase roses, blackspot resistance is a primary criterion.

Roses that have shown excellent black spot resistance:

Quicksilver

Olivia Rose Austin

Dee-Lish (has a strong cinnamon fragrance)

Plum Perfect

Duchesse de Brabant

Purple Lodge

Frederic Mistral (newer for my garden but showing good B.S. resistance thus far)

Belinda's Dream has been outstanding here...

This past Spring, I sprayed about 4-5 roses with Neem Oil.

Roses that I am receiving this Fall:

Marchesa Boccella

Savoy Hotel

Desdemona

Blossomtime

Regarding disease resistance, my experience is that disease resistance increases with the age of a bush. If a known very disease resistant rose variety shows disease symptoms in its youth, especially quart size roses, don't lose heart, stick with it. Every year it will increase in showing its disease resistant qualities, until very shortly it is almost cast iron in shrugging off disease.

Good care keeps disease resistant roses in top form. Bad care, and even disease resistant roses respond adversely.

Your list above is a great one. You did your homework! I would recommend: Bliss (very fragrant), Earth Angel (v.f.), Dee-Lish (v.f.), South Africa, and Poseidon. Please study them up. They are top disease resistant roses....right up there with the Knock Out line of roses.

Moses

Moses, do you have experience with Poseidon? This is at the top of my list for new purchase so I'm most interested in it.

Vapor,

I have two, just put in this year. It is evident Poseidon has a strong drive to bloom, even with the intense heat, and unrelenting sunshine. Give it a try.

Moses

@ dianela7bnorthal, Most of my list was created from your recommendation on other threads! I dont spray so my conditions are harsher. I have lady of Shallot and Beverley and they stay clean. LOS is a favorite.

Ken, I had Munstead Wood a few years ago and lost it. Scepter' d Isle was great this year, but doesnt look good this summer. I have to see whats going on there.

Sharon and Totoro, I am struggling to decide on Plum Perfect. On one hand the blooms look delish, but zero fragrance? and when it gets hot here many roses fade and lose petal count, wonder how PP does in the heat?

Lynn, I have Marchesa Boccella and Desdemona. Desdemona is 100% clean and blooms in flushes. Marchesa Boccella is relatively clean but does not bloom a lot yer (maybe 2 yr old plant). Thanks for the other recommendations, I will look them up

@Moses, Pittsburgh, W. PA., zone 5/6, USA, Thanks for the recommendations, does bliss do well in the heat/thrip damage? I have first crush from that series and i am about to take her out. Thrips love this rose and in 3+ years, I have not had a single full bloom. I had previously considered and decided against earth angel as many people here said its more of a spring bloomer and poor repeat. Dee-Lish, South Africa, and Poseidon look great, will add them to the list to study further, thank you! Especially if Poseidon like the heat:)

Houzz has been unusually difficult, have been unable to post so hope this post goes through!