Rose Hybridizers Association Forum

Hi RBx, I hope so too. Additionally, R. rugosa seems promising too. There have been some instances some R. setigera plants (that while not overly symptomatic) have tested positive for RRD. Perhaps the virus can still live and multiply to some extent at times in some of these resistant or tolerant ro...

Hi Duane! Most all of the Above and Beyond seedlings do not have juvenile bloom. Some once mature are more freer flowering. A&B is a cross of a mini and a species hybrid (R. virginiana x R. laxa). So, we can guess it has rrRR (R is one time bloom, r repeat) for the primary gene that generally govern...

Hi Karl! It would be great if there was more momentum with protoplast fusion in roses and follow up papers on characterizing these putative fusion hybrids, if they still exist. From my memory I think I came across something at some point that questioned if these plants were really fusion hybrids, bu...

That's a great point about a critical biomass maybe being important for rebloom for them Larry. They were little plants when I sent yours in 4" pots. Some seedlings of Sweet Cherry Tea bloomed the first year, but only when I pushed them with starting them early (germinated January I think) and got a...

That is really interesting Larry and a great question. I think the plants I sent you were cuttings from late 2018 that I grew in the greenhouse through the winter and likely confused some before sending them to you come spring. It'll be great to learn what they'll do this coming season for you in re...

Thank you Henry :0). I really like this ninebark seedling because it reblooms with flowers at the terminals midsummer and on and that forces branching from beneath and nice warmly colored shoot tips without pruning. Consistent and strong rebloom in ninebark is not something I've seen in other cultiv...

Dear Matt, That is a great question. If you post pictures, hopefully some of us can help you the best we can. Dr. Walter Lewis is the foremost expert. Here is a link to part of the Flora of North America Rosa section he put together. There is a series of books and he put together the Rosa section wh...

Thanks Dane, I have 'Max Graf' fortunately and we are using it in the study too. I got it years ago from Pickering in Canada and have been able to keep plants going of it since through various moves. It is a little tender dying down to the ground in harsh winters. It is described as near sterile and...

Thank you Henry for posting this. Yes, it is Pretty Polly White Joe :0). It was a seedling back about 20 years ago. I really like it because of the relatively dark green leaves and abundant white flowers. It is near thornless on the stems, but still has prickles on the undersides of the leaves. It s...

Hi Matt! Those are great questions. Grafting/budding/chip budding interestingly was the topic today for the Plant Propagation class I teach. We talked about T budding and chip budding and the advantage of chip budding since it can be done over a much wider time period. The bark does not need to be "...

I'm excited Dave Schulte has picked up the series and has enough 'Sven' ready to sell. Hopefully the other 3 will be ready to add to their offerings soon. I had a great visit with him and his wife about their efforts to make them more widely available again. Dave has a strong passion for a wide rang...

Hi Rob,

Yes, but I cover all my pots with construction blankets to get them through the winter.

What an interesting topic. Like Joe, I've noticed the more seed in a hip the more energy seems to be diverted there and the faster the ripening. Also, general hybrid vigor may be involved. In a past Gudin et al. paper they looked at pollinations done at different temperatures and besides impact of t...

I was able to purchase the yellow one and red one (I think the red one is from Meilland) and have them in pots still. I actually got them last summer and have to build new beds. They seem healthy and very nice so far. There isn't much for op hips on them.

The pollen of 'Chinook Sunrise' is relatively fertile it seems. I used it on a number of females and the seed set is pretty good. When I tried to use it as a female parent there weren't any hips that formed or any op hips either. Someday I'll try to count its chromosomes to see if it may be triploid...

We were looking for Rosa x kordesii for a black spot research study to understand if it may be the source/share the same black spot resistance gene that is in many of the Explorer series of roses. It was very hard to find R. x kordesii in the US. A friend from CA was very kind and shared a couple cu...

Hi Chuck! I'm not sure of its story. I saw it for sale online through J&P a couple years ago and was excited to try it because it is yellow. It grows like a mini and I forgot if they sold it as a mini or shrub. There was no code or variety name in small print associated with the marketing or tag. I'...

I haven't seen 'Twinkling Lights' for sale in a year or so, but Jackson and Perkins was selling it. The yellow color is very rich and doesn't seem to fade much at all. Unfortunately, it doesn't set any hips. I tried some of its pollen and have to check to see if any hips are forming using it.

In the Twin Cities area there is a special school fundraiser plant sale Mother's Day weekend that is huge now. They bring in a lot of plant material from Jeffries in Canada and many other nurseries too. I got an 'Olds College' last year and 'Chinook Sunrise' this year. I love the double warm colored...

That rose of your friend's Kim is very beautiful!