Q: In a previous question/answer you said that the Rose Verbena was short-lived as perennials go. What do you mean by short-lived?

Asked by: marsue - 8/29/2017
A: In some settings, rose verbena may not survive more than a couple of years. It likes sunny, well-drained conditions.
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Answer provided by: Administrator (9/4/2017)

Q: Is this an invasive plant?

Asked by: D. Jane Bartlett - 3/15/2017
A: It can spread a little by seed.

It is a sprawling plant, and it can grow roots from where it's stem lies on the ground. This means that it can slowly expand its original territory from where it was planted. By those standards, you could say that it spreads. I wouldn't go so far as to call it "invasive".

It is also a fairly short-lived plant as far as perennials go.
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Answer provided by: Administrator (3/15/2017)

Q: Is it totally too late to plant your svanna wildflower seed pack?

Asked by: pat - 3/5/2017
A: Most of the seeds in the savanna seed mix need a cold moist period (stratification). Ideally, the seeds should be sown between November and late January.

Sometimes, rose verbena will germinate without stratification, but a minimum of two weeks stratification (or ideally 4 to 6 weeks) will greatly increase the number of seeds that germinate. You can do this in the refrigerator by mixing the seeds with some moistened sand or potting soil and chilling them for the appropriate amount of time.
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Answer provided by: Administrator (3/6/2017)

Q: What would be a good alternative to this?

Asked by: Renee Jakubowicz - 5/4/2019
A: Downy phlox
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Answer provided by: Administrator (5/8/2019)

Q: Does verbena canadensis benefit from cold moist stratification? I f so for how long a period?

Asked by: steve shull - 5/11/2020
A: Fresh seed often germinates within a month or two after sowing in June or July; additional germination will occur the following spring.

Stored seed should (probably) be cold-moist stratified for at least 30 days.

My records (going back to 2011) show that there is almost always some germination, but there isn't a "best method". Stored seed sometimes germinates fine with 60-100 days strat; sometimes it germinates poorly. The same story with fresh seed and no strat. One possible variable might be how well each seed lot was cleaned; poor germination might be due to a high volume of non-viable seed. Either the plants didn't get pollinated very well, or we didn't clean the seed well enough (probably a combination of both).
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Answer provided by: Administrator (5/19/2020)

Q: What is the hardiness zone for your rose vervain?

Asked by: melanie - 10/8/2016
A: Our plant stock is from central Missouri. Missouri Botanical Garden lists it in zones 5 - 9. Here is the link for more info: http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=f204
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Answer provided by: Administrator (10/12/2016)

Q: Is this plant deer and rabbit resistant?

Asked by: Beatriz Kimball - 6/6/2019
A: Its bitter leaves should deter deer and rabbits. If they do nibble it, it should be fine and will send out new growth fairly quickly.
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Answer provided by: Administrator (6/25/2019)

Q: Is this a good container plant in Zone 5 (Des Moines, IA)? For example, wild petunia and little bluestem are growing well in my containers without watering.

Asked by: Robin - 10/5/2019
A: Rose verbena isn't a strong perennial, so it likely won't survive the winter in a Zone 5 container. However, it will be fine in a container during the growing season.
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Answer provided by: Administrator (11/22/2019)

Q: when can you start to ship plants

Asked by: mike grady - 3/25/2021
No Answers have been submitted yet.

Q: looking for a hardy ground cover to plant in mulch covered roadside with a 60 to 75 degree slope. Not very high plant that blooms all summer without any care and will be able to with stand central Iowa winters.

Asked by: SuAnn - 4/5/2021
No Answers have been submitted yet.

Q: When is the best time of year to plant Rose Verbena in southwest Missouri? Thank you!

Asked by: Kristin - 7/2/2021
No Answers have been submitted yet.

Q: What is best way to help this plant come back year after year? Let it reseed where it grows or try to collect seeds?

Asked by: MNkc - 8/30/2021
A: If you have a green thumb, you can grow it from seed that you collect. Fresh seed (often ripe in June) will germinate within a couple of weeks if sowed right away. You can also make cuttings from non-flowering stems. Take a portion of the stem with two nodes and plant it in a germination medium.

If growing plants from seed is not something you want to try, then letting it re-seed on its own will be your best option.

It can be a short-lived perennial in some sites, so learning how to propagate it is a worthwhile activity.
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Answer provided by: Administrator (8/30/2021)

Q: Will this item withstand below freezing

Asked by: Brenda - 2/21/2022
A: Yes. It can actually be somewhat evergreen. However, it is not a long-lived perennial and may disappear after a couple of years.
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Answer provided by: Administrator (2/21/2022)

Q: hardiness zone of rose verbena

Asked by: jim - 2/28/2022
A: 5 to 9
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Answer provided by: Administrator (3/1/2022)

Q: I have a sunny slope on the side of my city house. I already have non-native shrubs spaced apart with room for low-growing flowers. I use a sprinkler there for 30 minutes about 2x per week. Would this be dry enough for rose verbena? I would also like to plant pussytoes and alumroot. Would it be too much moisture for them?

Asked by: Cindy - 3/11/2022
A: As long as it drains well, the plants should be fine. Prolonged oversaturation could be a problem.
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Answer provided by: Administrator (3/17/2022)