En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Kinnikinnick for a green roof

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Wednesday - July 04, 2012

From: lynnwood, WA
Region: Northwest
Topic: Planting, Propagation, Green Roofs, Groundcovers, Herbs/Forbs
Title: Kinnikinnick for a green roof
Answered by: Guy Thompson

QUESTION:

Hi Mr. Smarty Plants, I live just north of Seattle and want to build a green roof (outdoor kitchen) I'm concerned about the weight of the soil (saturated), drainage etc. am building from scratch and am a building official so can calc the loads. - tons! so (don't try this at home kids) - I don't like the weedy look of sedums so was thinking about Arctostaphylos uva-ursi (L.) Spreng. Kinnikinnick and need to know what depth of soil, if it might really grow on the warm windy roof - (it does rain here) - and maybe this plant could work.. thoughts?

ANSWER:

Arctostaphylos uva-ursi (Kinnikinnick) is an obvious prospect for a green roof.  Attractive, tolerates water-logging and drought, and found throughout the Pacific Northwest.  The problem is that it grows slowly and is not easily transplanted.  If you are planning to grow it for yourself it would seem best to start with cuttings or seed.  This web site gives information on propagation from seed, stem cuttings and root cuttings.  The Woodland Park Zoo tested Kinnikinnick on a green roof in 2006.  They found that it survived but only on slopes of less than 15%.  At greater slopes their growth medium (6 inches in depth) did not retain water well enough to prevent root drying.  Some details are given in a Masters degree thesis.  The Kinnikinnick plants were young and perhaps had not established an extensive root system.  I advise you to call ( (206) 548-2520) or drive to the zoo and find out more recent information.  Kinnikinnick has also been used on the Vancouver, BC, library roof.

Because of the widespread interest in green roofs improved planting media are always appearing. I found numerous potentially useful web sites in a Google search for "Green roof growth media, Pacific Northwest.  Kinnikinnick plants are available in Seattle area nurseries, e.g.,  the Woodbrook Native Plant Nursery and probably at some of the ones on this list.

 

 

From the Image Gallery


Kinnikinnick
Arctostaphylos uva-ursi

More Groundcovers Questions

Native ground cover for Houston
March 02, 2009 - I'm interested in finding native ground cover, either perennials or grasses, that would help control erosion on a steep slope along Soldiers Creek. Currently there is Jasmine, ivy, prairie spiderwort...
view the full question and answer

Ground cover for steep slope in Washington DC
May 07, 2010 - We have a steep slope in our garden in Washington DC which has sun from noon to sun set. Could you please recommend some low maintenance plants which would be a good ground cover and limit erosion?
view the full question and answer

Splash-proof plants from Oakton VA
October 01, 2012 - Hi Mr Smarty Plants, Re: low, evergreen ground cover, Northern Virginia The bare soil around my freshly painted screen porch splashes up onto the white framing when it rains so I am looking for ...
view the full question and answer

Ground cover for Thornton CO
June 04, 2012 - I want to order ground cover because I don't want to mess with grass any more. I live in Colorado, north of Denver. The soil has a lot of clay. I tried clover and that did not do well. My yard is par...
view the full question and answer

Alternatives to invasive, non-native Vinca minor as ground cover
April 05, 2007 - I live in Central Austin. I want to plant a large area of Vinca minor since it is fast growing and offers attractive ground cover. I assume it requires little care with the rain being sufficient for i...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center