Search found 364 matches

by david zlesak
Wed Jan 08, 2020 1:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Protoplast Fusion
Replies: 5
Views: 109

Re: Protoplast Fusion

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...
by david zlesak
Sun Jan 05, 2020 4:20 pm
Forum: Rose Hybridizers Association Forum
Topic: non rose plant from Zlesak
Replies: 9
Views: 174

Re: non rose plant from Zlesak

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...
by david zlesak
Sun Jan 05, 2020 12:43 pm
Forum: Rose Hybridizers Association Forum
Topic: non rose plant from Zlesak
Replies: 9
Views: 174

Re: non rose plant from Zlesak

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...
by david zlesak
Sat Jan 04, 2020 10:54 am
Forum: Rose Hybridizers Association Forum
Topic: non rose plant from Zlesak
Replies: 9
Views: 174

Re: non rose plant from Zlesak

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...
by david zlesak
Sat Jan 04, 2020 10:40 am
Forum: Rose Hybridizers Association Forum
Topic: North American Rose ID?
Replies: 2
Views: 76

Re: North American Rose ID?

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...
by david zlesak
Tue Dec 24, 2019 6:18 pm
Forum: Rose Hybridizers Association Forum
Topic: Freedom Gardens is a source for rare roses
Replies: 6
Views: 755

Re: Freedom Gardens is a source for rare roses

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...
by david zlesak
Sun Dec 15, 2019 1:02 am
Forum: Rose Hybridizers Association Forum
Topic: Polyantha rose plant named ‘Zlepoltwo’
Replies: 2
Views: 146

Re: Polyantha rose plant named ‘Zlepoltwo’

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...
by david zlesak
Mon Dec 02, 2019 8:46 pm
Forum: Rose Hybridizers Association Forum
Topic: Chip Budding Questions
Replies: 4
Views: 216

Re: Chip Budding Questions

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 "...
by david zlesak
Sat Nov 02, 2019 10:13 pm
Forum: Rose Hybridizers Association Forum
Topic: Northern Accents® ‘Lena’, ‘Ole’, ‘Sigrid’, and ‘Sven’: Four
Replies: 7
Views: 1271

Re: Northern Accents® ‘Lena’, ‘Ole’, ‘Sigrid’, and ‘Sven’: Four

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...
by david zlesak
Fri Oct 25, 2019 9:08 pm
Forum: Rose Hybridizers Association Forum
Topic: 3 Newer Radler roses
Replies: 4
Views: 645

Re: 3 Newer Radler roses

Hi Rob,

Yes, but I cover all my pots with construction blankets to get them through the winter.
by david zlesak
Fri Oct 25, 2019 9:38 am
Forum: Rose Hybridizers Association Forum
Topic: Question about seed ripening and pollen parent
Replies: 16
Views: 1130

Re: Question about seed ripening and pollen parent

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...
by david zlesak
Thu Oct 24, 2019 3:46 pm
Forum: Rose Hybridizers Association Forum
Topic: 3 Newer Radler roses
Replies: 4
Views: 645

Re: 3 Newer Radler roses

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.
by david zlesak
Fri Oct 18, 2019 9:37 am
Forum: Rose Hybridizers Association Forum
Topic: 'Chinook Sunrise' met its sunset
Replies: 13
Views: 1148

Re: 'Chinook Sunrise' met its sunset

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...
by david zlesak
Fri Sep 13, 2019 11:26 am
Forum: Rose Hybridizers Association Forum
Topic: Freedom Gardens is a source for rare roses
Replies: 6
Views: 755

Freedom Gardens is a source for rare roses

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...
by david zlesak
Sun Aug 25, 2019 2:13 pm
Forum: Rose Hybridizers Association Forum
Topic: Non-fading suggestions
Replies: 11
Views: 655

Re: Non-fading suggestions

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'...
by david zlesak
Sat Aug 24, 2019 9:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Non-fading suggestions
Replies: 11
Views: 655

Re: Non-fading suggestions

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.
by david zlesak
Thu Jul 04, 2019 10:11 am
Forum: Rose Hybridizers Association Forum
Topic: 'Chinook Sunrise' met its sunset
Replies: 13
Views: 1148

Re: 'Chinook Sunrise' met its sunset

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...
by david zlesak
Fri Jun 21, 2019 10:50 am
Forum: Rose Hybridizers Association Forum
Topic: Variegated roses?
Replies: 35
Views: 1943

Re: Variegated roses?

That rose of your friend's Kim is very beautiful!
by david zlesak
Thu Jun 20, 2019 8:03 pm
Forum: Rose Hybridizers Association Forum
Topic: rugosa x glauca seedling
Replies: 9
Views: 796

Re: rugosa x glauca seedling

Your seedling is beautiful!! I love the dense habit and richly colored blooms.
by david zlesak
Thu Jun 20, 2019 7:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Variegated roses?
Replies: 35
Views: 1943

Re: Variegated roses?

The variegated seedlings from this spring posted above for the most part don't look too healthy. The variegation seems to be less pronounced than before and lead to the leaves being smaller and kind of mottled and off color. I shared some for virus testing and it'll be interesting if something is fo...