RSM J-5 (Marshall, 1973)

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paul.barden
Posts: 34
Joined: Sun Sep 14, 2014 11:20 am

RSM J-5 (Marshall, 1973)

Post: # 74463Post paul.barden
Wed Jun 01, 2022 12:12 pm

Has anyone used Marshall's J-5 to create repeat blooming yellow/peach seedlings? I'm loaded up with pollen right now and I'm thinking about trying it on some yellow breeders with a known history.

https://www.helpmefind.com/gardening/l. ... 95.2&tab=1

paul.barden
Posts: 34
Joined: Sun Sep 14, 2014 11:20 am

Re: RSM J-5 (Marshall, 1973)

Post: # 74474Post paul.barden
Sat Jun 04, 2022 10:18 am

I guess I'll just try it and see what I get! Brace yourself, 1-72-1!

pacificjade
Posts: 900
Joined: Sat Dec 17, 2011 12:15 am

Re: RSM J-5 (Marshall, 1973)

Post: # 74475Post pacificjade
Sat Jun 04, 2022 3:05 pm

I saw your post and thought about it, but had nothing to add. Looking at the lineage of the Morden yellows, it gets a little confusing. For example, they add Rosa foetida bicolor back in later, but the rest is mostly the same admixture of arkansas and floris, etc. Until they use Sunsprite. So why did they repeat the process many times after J-5? That is what I wondered when considering your post.

I bought Morden Sunrise for $5 this spring from Ho d'Pot, just to see and likely cull it later. Definitely short on petals and a little light. The vigor is way above average. I am sure it will eventually BS, but I could see the potential of using it.

J5 itself has pretty foliage. If one uses it, it would be a shame to lose that. I think there is potential in use any of these, but probably with roses more compact and probably with the need to reinforce BS resistances.

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