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White rose #769732

Asked August 29, 2021, 6:34 PM EDT

Can you tell me what kinda rose this is? And 2nd I have rooted cutting in pot what best so can survive the winter so I can plant it in the spring thank you

Anoka County Minnesota

Expert Response

It appears to be a hardy shrub rose; however, I can't identify the species/variety, so I recommend you contact the Minnesota Rose Society https://minnesotarosesociety.org/ and see if one of their rosarians can help you. It's a lovely rose, and you have done a great job propagating it!

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied August 30, 2021, 10:49 AM EDT

Ok great thank you I did email the Minnesota Rose Society 
On Mon, Aug 30, 2021 at 9:49 AM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied August 30, 2021, 11:11 AM EDT

Good luck! They should be able to help or refer you.

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied August 30, 2021, 3:01 PM EDT
I have question my mom told me my dad got the rose bush  at u of m and my dad work there on the St. Paul Campus for 30 years is it possible for me to come there at look at roses you have please let me know 

On Mon, Aug 30, 2021 at 2:01 PM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied August 31, 2021, 11:15 AM EDT

Cool! Having this information, I consulted a 1995 UMN publication called Roses for the North (I have an original copy) and I found a rose that looks very similar called Rosa 'Alba Semi-Plena' - pictures from the publication attached). Note that this is a David Austin rose, not a UMN release. 

Then I used a tool called Plant Finder and see there are several of these roses growing in the Nelson Shrub Rose Garden here at the MN Landscape Arboretum. So you could come here to see if they look the same. 

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied August 31, 2021, 1:33 PM EDT
Very interesting my mom said he probably got at the greenhouse is that on St. Paul Campus I’m guessing it is do you let the Public come there by chance? And thank you so much for looking that up

On Tue, Aug 31, 2021 at 12:33 PM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied August 31, 2021, 3:11 PM EDT

No, the public isn't allowed to look around in the greenhouses because of research going on and student work. Besides, the plants your dad knew 30 years ago will no longer be there. I also don't know of any roses being grown in greenhouses. These roses are hardy landscape plants and aren't grown in greenhouses very long. Your best bet is to visit the Arboretum.

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied August 31, 2021, 3:17 PM EDT

Sounds good we’re abouts is the arboretum located and thank you for all your help 
On Tue, Aug 31, 2021 at 2:17 PM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied August 31, 2021, 5:03 PM EDT

https://arb.umn.edu/

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied August 31, 2021, 5:09 PM EDT

Great thank you I have one more question i have that rooted cutting that I have in the pot and how should I go about Winterizing I was just going to put in garage and put leaves over and cover with a blanket and then plant in the ground in the spring do you have any other suggestions how to winterizing it this my frist time rooting a cutting 
On Tue, Aug 31, 2021 at 4:09 PM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied September 01, 2021, 12:16 PM EDT

Without knowing the cultivar for sure, it is hard to be sure of its winter hardiness. However, if this is a Rosa 'Alba Semi-plena', it is a hardy shrub rose in Minnesota. Did your dad have the mother plant (where you got the cutting) outside in the yard? 

You can plant it outside in your garden now so it has time to go dormant for winter. Keep the soil moist after planting up until the ground freezes. Enclose the plant in a fence of hardware cloth about 4' high to prevent animal browsing over winter. You can pack the fencing with fallen leaves for extra winter protection this first year outside. 

In the spring, you may have a little winter dieback (brown) stems. If so, cut back the brown stem back about 1/4" into living green stem tissue.

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied September 01, 2021, 3:43 PM EDT

I have the mother plant in my yard now and I took a cutting from mother plant so it’s same Hardy shrub white rose the cutting is going starting  dormant now what I do with mother plant is cover it with leaves in October and put blanket over it so I was going to do the same thing with the cutting except put in the garage I’m giving to a friend in spring so I was going to plant then they won’t be available until spring. Let me if that’s good idea to do same thing as I would do with the mother plant? And how often should I water the cutting that’s in the pot I’m using Organic compost in the pot.
On Wed, Sep 1, 2021 at 2:43 PM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied September 01, 2021, 4:32 PM EDT

You can do the same with the plant rooted from the cutting. Check the young plant through winter and just keep the soil barely moist (water maybe 1X per month).

Julie Weisenhorn, Extension Educator - Horticulture University of Minnesota Replied September 02, 2021, 12:09 PM EDT

Ok great thank you for your help 
On Thu, Sep 2, 2021 at 11:10 AM Ask Extension <<personal data hidden>> wrote:
The Question Asker Replied September 02, 2021, 12:12 PM EDT

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