Search found 155 matches

by donaldvancouver
Mon Dec 17, 2018 9:50 pm
Forum: Rose Hybridizers Association Forum
Topic: Three-year screening for cold hardiness of garden roses
Replies: 5
Views: 231

Re: Three-year screening for cold hardiness of garden roses

Larry- my acclimation will be outdoors: the roses will have already been at somewhere between 4c and -2c for days or weeks. That's why I'm doing this now, and not in July. And yes the shock in the freezer might kill them- but roses in, say, Alberta need to survive sudden drops from 0 to -20c all the...
by donaldvancouver
Mon Dec 17, 2018 11:18 am
Forum: Rose Hybridizers Association Forum
Topic: Three-year screening for cold hardiness of garden roses
Replies: 5
Views: 231

Re: Three-year screening for cold hardiness of garden roses

Thanks Henry- I'm attempting a low-tech version of this experiment this winter. Rather than conditioning the sections of stem with sugars, I'm waiting for them to shut down for the winter (which seems to take place around January 1 most years where I live.) I will freeze sections of stem to -20c for...
by donaldvancouver
Sun Sep 16, 2018 12:24 pm
Forum: Rose Hybridizers Association Forum
Topic: Show-and-tell from last season?
Replies: 19
Views: 2074

Re: Show-and-tell from last season?

I can't wait to see BERGmeowpoo.
by donaldvancouver
Mon Jun 11, 2018 11:45 am
Forum: Rose Hybridizers Association Forum
Topic: Diploid vs Tetraploid - a crossroads
Replies: 15
Views: 1039

Re: Diploid vs Tetraploid - a crossroads

What is an FLC? Can we please define three-letter acronyms if we must use them? Thanks.
by donaldvancouver
Sat Mar 17, 2018 8:17 pm
Forum: Rose Hybridizers Association Forum
Topic: Change in the US plant patent novelty requirements
Replies: 14
Views: 3500

Re: Change in the US plant patent novelty requirements

Ok that was a bit of thread-hijack right there. We seem to do a lot of that around here.
by donaldvancouver
Thu Mar 15, 2018 12:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Change in the US plant patent novelty requirements
Replies: 14
Views: 3500

Re: Change in the US plant patent novelty requirements

Hello- I'd like to revive this post (please let me know if it has been revived elsewhere.) Have there been updates to the issue of novelty requirements in US patents? Has this been tested in court yet? Has "novelty" been more clearly defined? Has the law reduced the sharing of new plants among hybri...
by donaldvancouver
Wed Mar 14, 2018 11:31 am
Forum: Rose Hybridizers Association Forum
Topic: Purples/Lavenders for breeding
Replies: 26
Views: 2747

Re: Purples/Lavenders for breeding

Hi- Poseidon is remarkably disease-resistant. Really impressive. The flowers are not as beautiful as other mauves, but from a breeder's perspective it might be the most interesting.
by donaldvancouver
Fri Mar 09, 2018 1:09 pm
Forum: Rose Hybridizers Association Forum
Topic: Newbie(ish) question
Replies: 15
Views: 1207

Re: Newbie(ish) question

Don- thanks very much- that thread is really informative and I don't think I'd seen it before.
by donaldvancouver
Wed Mar 07, 2018 6:28 pm
Forum: Rose Hybridizers Association Forum
Topic: Newbie(ish) question
Replies: 15
Views: 1207

Re: Newbie(ish) question

It's a noble goal. For me, once I select for fungal resistance, cold hardiness, bloom size shape and colour, plant architecture and scent, I'll settle for it just having leaves.
by donaldvancouver
Mon Mar 05, 2018 9:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Newbie(ish) question
Replies: 15
Views: 1207

Re: Newbie(ish) question

On this subject, does anyone have access to market research on rose preferences? We often hear that colour (anything but pink) is a top influencer in a decision to purchase a rose. Many of us assume dark, shiny leaves are more marketable—do we have any market research to back this up? Kim, you've me...
by donaldvancouver
Wed Feb 21, 2018 11:04 am
Forum: Rose Hybridizers Association Forum
Topic: World Federation Rose Societies conference - Copenhagen
Replies: 5
Views: 652

Re: World Federation Rose Societies conference - Copenhagen

I noticed the Canadian speaker was 'to be determined.' Did someone drop out?
by donaldvancouver
Tue Feb 20, 2018 8:49 pm
Forum: Rose Hybridizers Association Forum
Topic: Beginner Question, How to Streamline Germination & Planting?
Replies: 6
Views: 890

Re: Beginner Question, How to Streamline Germination & Plant

I think any of your methods will work. I would favour 1 or 2. I haven't had much luck with direct sowing in the ground—it's hard to weed around them, and if the top 1/4" of your soil dries out it can kill your seedlings. Pots or trays give you better control, and potentially better potting media tha...
by donaldvancouver
Mon Jan 08, 2018 3:17 am
Forum: Rose Hybridizers Association Forum
Topic: cold-hardy breeders
Replies: 11
Views: 1241

Re: cold-hardy breeders

Paul- thanks for the tip. I didn't realize Brentwood Bay were still in business- last time I visited it looked like they were closed for good.
by donaldvancouver
Mon Dec 25, 2017 1:13 pm
Forum: Rose Hybridizers Association Forum
Topic: Visions of Sugar Plums
Replies: 7
Views: 634

Re: Visions of Sugar Plums

Hi I tend toward simplicity. I find numbers and codes to be a lot of cognitive work to keep track of, so I identify each parent with an acronym based on the plant's name: Bonica becomes BONI, Golden Celebration GCEL, Easy Going EAGO and so on. With each cross I just note the date and the pollen pare...
by donaldvancouver
Wed Dec 20, 2017 9:05 am
Forum: Rose Hybridizers Association Forum
Topic: cold-hardy breeders
Replies: 11
Views: 1241

Re: cold-hardy breeders

Thanks all- this is very helpful. I'm hoping I can breed disease resistance in from the tender side- I seem to be having some luck doing so. Some of the new Kordes roses are amazing- Eliza, Desmond Tutu, the Fairy Tale series- as well as some of the Harkness and Meillands. Very little fungal disease...
by donaldvancouver
Tue Dec 19, 2017 10:38 am
Forum: Rose Hybridizers Association Forum
Topic: cold-hardy breeders
Replies: 11
Views: 1241

cold-hardy breeders

Hi- I'm hoping to round out my collection of cold-hardy breeding plants. For the next year or two I'm concentrating on breeding repeat-blooming z3 roses with disease-resistant tender and half-tender roses. Tetraploids would be great but not a deal-breaker. I have Frontenac and L83, and Bonica (not q...
by donaldvancouver
Sun Dec 17, 2017 8:45 pm
Forum: Rose Hybridizers Association Forum
Topic: Cold hardiness of seeds as a predictor of cold hardiness
Replies: 15
Views: 926

Re: Cold hardiness of seeds as a predictor of cold hardiness

Larry- thanks very much for the advice. Hmm, -70 is a bit too cold, even for acicularis crosses :) It will be interesting to see if your rugosas germinate. This winter I'm trying an all-natural stratification: I have my seeds planted in trays of potting soil already, and they're sitting outdoors wit...
by donaldvancouver
Sun Dec 17, 2017 3:21 pm
Forum: Rose Hybridizers Association Forum
Topic: Cold hardiness of seeds as a predictor of cold hardiness
Replies: 15
Views: 926

Re: Cold hardiness of seeds as a predictor of cold hardiness

Paul- I would need a laboratory freezer—one that lets you determine the desired temperature. I'm hoping I might be able to find a local university who might let me have a bit of space. I do plan to trial my roses in gardens across the country, using an informal network of friends and interested peop...
by donaldvancouver
Sun Dec 17, 2017 1:28 pm
Forum: Rose Hybridizers Association Forum
Topic: Cold hardiness of seeds as a predictor of cold hardiness
Replies: 15
Views: 926

Re: Cold hardiness of seeds as a predictor of cold hardiness

Doug- Sure it is- Wild Edric is a great example. The problem with doing so in a warm climate is identifying which of the F1s are cold hardy. Felicitas Svejda was able to demonstrate that hardy x hardy = hardy. That's simple. Where it gets interesting is when you cross hardy with tender. She found th...
by donaldvancouver
Sun Dec 17, 2017 12:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Cold hardiness of seeds as a predictor of cold hardiness
Replies: 15
Views: 926

Re: Cold hardiness of seeds as a predictor of cold hardiness

Thanks very much Johannes, David and Paul. I think I will pursue this next year. I collected some single-flowered rugosa seeds in Alaska one year, dried them completely and threw them in the freezer at normal household freezer temps (around -10 to -15C, I think.) They started germinating as soon as ...