Search found 107 matches

by Plazbo
Sun Jan 20, 2019 4:34 pm
Forum: Rose Hybridizers Association Forum
Topic: Anybody using any of the old HT fav's of the 20th c.?
Replies: 6
Views: 196

Re: Anybody using any of the old HT fav's of the 20th c.?

I'm getting Margaret McGreedy this year, it carries bicolour, fragrance and has demonstrated fertility, i like bicolours but the available options either lack fragrance or fertility in most cases...that probably doesn't add anything to the discussion.
by Plazbo
Fri Jan 18, 2019 7:03 pm
Forum: Rose Hybridizers Association Forum
Topic: Culling
Replies: 7
Views: 186

Re: Culling

If you have the space and time and there isn't any obvious reason to cull a plant...there isn't any harm in keeping it around. Eventually you'll reach a point where you either use it in breeding or not and if you don't you'll probably reach the conclusion it's time to let it go to make room. Culling...
by Plazbo
Thu Jan 03, 2019 5:10 am
Forum: Rose Hybridizers Association Forum
Topic: Do more richly colored seedlings have more richly colored blooms?
Replies: 16
Views: 770

Re: Do more richly colored seedlings have more richly colored blooms?

Nice thought, but not necessarily so. Those reddish foliage/plant parts hint that red tints might show up in blooms, but they don't HAVE to. Mrs. Dudley Cross, Mme Antoine Mari, Faith Whittlesey are just a few out back with quite reddish foliage and basically white flowers (though some pinks do eve...
by Plazbo
Sat Dec 15, 2018 6:50 pm
Forum: Rose Hybridizers Association Forum
Topic: stratifying in the south...
Replies: 9
Views: 407

Re: stratifying in the south...

I'm in a similar boat to Kim, don't cold stratify and haven't found the need to, being in Sydney Australia, not too far from the coast there's minimal chance of sleet, let alone freezes or snow. I just collect the seed, pot them up and leave them outside. While germination rates with rugosa derivati...
by Plazbo
Wed Nov 28, 2018 4:48 pm
Forum: Rose Hybridizers Association Forum
Topic: Problems with Search and Personal Messaging
Replies: 11
Views: 574

Re: Problems with Search and Personal Messaging

I agree with the above about search, I've been using google xxxx site:rosebreeders.org/forum instead for the last week and a bit.
by Plazbo
Sat Nov 24, 2018 7:05 pm
Forum: Rose Hybridizers Association Forum
Topic: How to efficiently handle 2,000 seeds
Replies: 11
Views: 625

Re: How to efficiently handle 2,000 seeds

It seems like Jim Sproul and Kim Rupert have good luck germinating in outdoor/greenhouse environments with no refrigerator stratification. (correct me if I'm wrong, guys) I do the just outside, no fridge thing. Moderns, Polys, Sweet Briars all germinate in large numbers straight from the hip to pot...
by Plazbo
Sat Oct 13, 2018 9:25 pm
Forum: Rose Hybridizers Association Forum
Topic: Compound Identification of Selected Rose Species and Cultivars: an Insight to Petal and Leaf Phenolic Profiles
Replies: 15
Views: 858

Re: Compound Identification of Selected Rose Species and Cultivars: an Insight to Petal and Leaf Phenolic Profiles

I have been trying for a decade to get a copy of Lemon Delight to cross with my mossed glutinosa f1's that have retained their pine scent. Not only does Lemon Delight apparently express lemonene but it is one of the very few, two maybe, hybrids between a hard moss and a soft moss. I think Burling i...
by Plazbo
Wed Sep 26, 2018 8:06 pm
Forum: Rose Hybridizers Association Forum
Topic: R. bracteata x Carefree Copper
Replies: 15
Views: 1082

Re: R. bracteata x Carefree Copper

I have often wondered whether R. foetida might be more fertile if it were allowed to go dormant during the heat of summer, rather than forced to grow on borrowed roots. Karl May be able to answer that next year. Have planted mine below the graft hoping for it to go own root (i like to see to what e...
by Plazbo
Mon Aug 27, 2018 3:21 am
Forum: Rose Hybridizers Association Forum
Topic: Remontancy
Replies: 25
Views: 2425

Re: Remontancy

That's kind of why I'm basing rugosa around Schneezwerg and Calocarpa. The former has demonstrated a small capacity of fertile crosses with tea/china and the latter is half china. Will see what happens in the season that's approaching. Bound to be a lot of sterile but selection over a few gens will ...
by Plazbo
Sun Aug 26, 2018 7:03 pm
Forum: Rose Hybridizers Association Forum
Topic: Remontancy
Replies: 25
Views: 2425

Re: Remontancy

Plazbo, my OP Alderman seedlings that bloomed as juvies are seeming pretty weak. I doubt they will amount to anything. I do, however, have some juvi bloomers from crosses with Ann Endt, Belle Poitevine, and a rugosa seedling. We'll see how that goes. Possibly just the juvenile phase or investment i...
by Plazbo
Tue Aug 14, 2018 3:42 am
Forum: Rose Hybridizers Association Forum
Topic: Thread about rose rosette virus in commercial roses
Replies: 5
Views: 525

Re: Thread about rose rosette virus in commercial roses

Parent company declares bankruptcy, one of the acquired companies (these are typically held for legal and tax loop holes) is "liquidated" to someone connected to the owner/s, company is liable (and bankrupt) the owner typically won't be if they've set up the company to typical standards. It's a fair...
by Plazbo
Tue Aug 14, 2018 12:00 am
Forum: Rose Hybridizers Association Forum
Topic: Thread about rose rosette virus in commercial roses
Replies: 5
Views: 525

Re: Thread about rose rosette virus in commercial roses

Being cynical, they could be attempting scorched earth. I mean they knew they had it for a few years before it became public, thats effort to destroy the business...unless they pull everyone else/competition down to the same level. Aren't likely to go out of business if everyone else is infected too.
by Plazbo
Wed Jul 18, 2018 6:50 pm
Forum: Rose Hybridizers Association Forum
Topic: Self-Incompatibility
Replies: 24
Views: 1436

Re: Self-Incompatibility

Re diploid species incompatible but diploid hybrid not being. The two species may have different self fertilisation barriers and neither are dominant/are compatible with each other or are located in different loci allowing the genes to be removed in further generations. Breeders would likely select ...
by Plazbo
Mon Jul 02, 2018 2:20 am
Forum: Rose Hybridizers Association Forum
Topic: Under-utilized species you feel might have merit
Replies: 62
Views: 3938

Re: Under-utilized species you feel might have merit

R. clinophylla for those of us in the warmer climates. Seeing as it grows in one warmest ranges for roses and survives flooding there's potential there. I think the only source of it in Australia may be Simon who's been MIA so may not be able to get access to it. R. micrantha, an alternative to R. r...
by Plazbo
Sun Jul 01, 2018 12:36 am
Forum: Rose Hybridizers Association Forum
Topic: Breeding plans for 2018
Replies: 38
Views: 3673

Re: Breeding plans for 2018

It's been 4 months since the initial post and my plans have altered somewhat. 1 - Foliage/sepals fragrance Still intend to pursue foilage fragrance via Lord and Lady Penzance. Have a 100+ Lord Penzance seedlings at the moment and a bunch of R. Rubiginosa OP from seed collected from feral plants in S...
by Plazbo
Fri Jun 29, 2018 3:47 am
Forum: Rose Hybridizers Association Forum
Topic: yellow rugosas
Replies: 12
Views: 689

Re: yellow rugosas

I did considerable work with Dr. Svedja' crosses. I liked what I got and I tried to encourage others to do also, but I do not think that anyone else did. Her early dipoid work has inspired me some. I likely wouldn't be looking at diploids like i currently do without reading some of the papers and r...
by Plazbo
Thu Jun 28, 2018 6:57 pm
Forum: Rose Hybridizers Association Forum
Topic: yellow rugosas
Replies: 12
Views: 689

Re: yellow rugosas

Tom Silvers made the cross rugosa x xanthina, but he writes that the hybrid has low fertility: http://maprc.blogspot.com/2012/11/rosa-rugosa-x-xanthina.html Its possibly a case of results will vary. I mean most rugosa x china are sterile to low fertility but a few are fertile. Dr Svedja did a numbe...
by Plazbo
Fri Jun 22, 2018 8:00 pm
Forum: Rose Hybridizers Association Forum
Topic: Diploid vs Tetraploid - a crossroads
Replies: 15
Views: 1025

Re: Diploid vs Tetraploid - a crossroads

Juvenile blooming is independent of the "gene for rebloom". De Vries: Juvenility in HT Roses (1976) http://bulbnrose.x10.mx/Roses/breeding/DeVriesJuvenile1976a/DeVriesJuvenile1976a.html De Vries, Dubois: Juvenile Period in HT Roses (1977) http://bulbnrose.x10.mx/Roses/breeding/DevriesJuvenile1977/D...
by Plazbo
Sat Jun 16, 2018 8:10 am
Forum: Rose Hybridizers Association Forum
Topic: Remontancy
Replies: 25
Views: 2425

Re: Remontancy

Some rugosas can produce juvi-blooming F1's when crossed with moderns. I noticed about three or four out of twenty Will Alderman x OP seedlings that are blooming as youngsters. On the other hand, I have dozens or hundreds of seedlings from another remontant rugosa that are not blooming as youngster...