Green Roofs - Living Architecture Monitor - Winter 2019 - 9
- BRADLEY ROWE
purpurea, species included
Allium cernuum (nodding pink
onion), Coreopsis lanceolata
(lanceleaf Coreopsis), Liatris
aspera (rough blazingstar), Monarda punctata (dotted mint),
Ruellia humilis (wild petunia),
Schizachyrium scoparium (little
bluestem), Symphyotrichum
laeve (smooth aster), Tradescantia ohiensis (spiderwort), and
Verbena stricta (hoary vervain).
During the establishment
period, plots were provided
with overhead irrigation on
an as-needed basis, however,
LIVINGARCHITECTUREMONITOR.COM
no supplemental irrigation has
been provided since after the
first season.
After seven growing seasons,
Sedum spp. have encroached
from neighboring plots and
Allium cernuum is by far the
dominant species. Most of the
originally planted species have
disappeared or are present in
small numbers. One exception
is Dalea purpurea which was
able to survive the drought
conditions during the spring
and summer of 2016. During a
57 day period from May to July,
Image courtesy Brad Rowe
"IN ITS NATURAL ENVIRONMENT, DALEA PURPUREA
GROWS WELL IN SANDY, WELL DRAINED SOILS AND
GETS MUCH OF ITS DROUGHT TOLERANCE FROM
THE AFOREMENTIONED DEEP TAPROOT."
total rainfall was 3.28 cm (1.29 in), which was roughly a third of
the normal rainfall for that time of year. One difference between
our study and the Chicago Botanic Garden study is that after
establishment we never supplied supplemental irrigation, whereas
the CBG watered during drought periods. However, the species
still survived over time.
Although Dalea purpurea has great potential for green roofs,
evidence suggests that like most herbaceous perennials, irrigation
would ensure plant health and long term survival.
Brad Rowe has been conducting green roof research at MSU since
2000. Research topics include plant selection, growing substrates, carbon
sequestration, stormwater runoff, energy conservation, and roof vegetable
production. He was the founding co-chair of the GRHC Research Committee and received the GRHC Research Award of Excellence in 2008.
Brad also teaches a course on green roofs and walls at MSU.
LIVING ARCHITECTURE MONITOR / WINTER 2019 / 9
http://www.LIVINGARCHITECTUREMONITOR.COM
Green Roofs - Living Architecture Monitor - Winter 2019
Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Winter 2019
Table of Contents
Green Roofs - Living Architecture Monitor - Winter 2019 - IP
Green Roofs - Living Architecture Monitor - Winter 2019 - Cover1
Green Roofs - Living Architecture Monitor - Winter 2019 - Cover2
Green Roofs - Living Architecture Monitor - Winter 2019 - Table of Contents
Green Roofs - Living Architecture Monitor - Winter 2019 - AD1
Green Roofs - Living Architecture Monitor - Winter 2019 - 1
Green Roofs - Living Architecture Monitor - Winter 2019 - 2
Green Roofs - Living Architecture Monitor - Winter 2019 - 3
Green Roofs - Living Architecture Monitor - Winter 2019 - 4
Green Roofs - Living Architecture Monitor - Winter 2019 - 5
Green Roofs - Living Architecture Monitor - Winter 2019 - 6
Green Roofs - Living Architecture Monitor - Winter 2019 - 7
Green Roofs - Living Architecture Monitor - Winter 2019 - 8
Green Roofs - Living Architecture Monitor - Winter 2019 - 9
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Green Roofs - Living Architecture Monitor - Winter 2019 - 34
Green Roofs - Living Architecture Monitor - Winter 2019 - Cover3
Green Roofs - Living Architecture Monitor - Winter 2019 - Cover4
Green Roofs - Living Architecture Monitor - Winter 2019 - 42
Green Roofs - Living Architecture Monitor - Winter 2019 - 43
https://www.nxtbook.com/dawson/greenroofs/lam_2020Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2020Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2020Summer
https://www.nxtbook.com/dawson/greenroofs/lam_2020Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2019Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2019Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2019Summer
https://www.nxtbook.com/dawson/greenroofs/lam_2019Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2018winter
https://www.nxtbook.com/dawson/greenroofs/lam_2018Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2018summer
https://www.nxtbook.com/dawson/greenroofs/lam_2018spring
https://www.nxtbook.com/dawson/greenroofs/lam_2017winter
https://www.nxtbook.com/dawson/greenroofs/lam_2017fall
https://www.nxtbook.com/dawson/greenroofs/lam_2017summer
https://www.nxtbook.com/dawson/greenroofs/lam_2017Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2016winter
https://www.nxtbook.com/dawson/greenroofs/lam_2016fall
https://www.nxtbook.com/dawson/greenroofs/lam_2016summer
https://www.nxtbook.com/dawson/greenroofs/lam_2016spring
https://www.nxtbook.com/dawson/greenroofs/lam_2015Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2015fall
https://www.nxtbook.com/dawson/greenroofs/lam_2015summer
https://www.nxtbook.com/dawson/greenroofs/lam_2015spring
https://www.nxtbook.com/dawson/greenroofs/lam_2014winter
https://www.nxtbook.com/dawson/greenroofs/lam_2014fall
https://www.nxtbook.com/dawson/greenroofs/lam_2014summer
https://www.nxtbook.com/dawson/greenroofs/lam_2014spring
https://www.nxtbook.com/dawson/greenroofs/lam_2013winter
https://www.nxtbook.com/dawson/greenroofs/lam_2013fall
https://www.nxtbook.com/dawson/greenroofs/lam_2013summer
https://www.nxtbook.com/dawson/greenroofs/lam_2013spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012fall
https://www.nxtbook.com/dawson/greenroofs/lam_2012summer
https://www.nxtbook.com/dawson/greenroofs/lam_2012spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012winter
https://www.nxtbook.com/dawson/greenroofs/lam_2011fall
https://www.nxtbook.com/dawson/greenroofs/lam_2011summer
https://www.nxtbook.com/dawson/greenroofs/lam_2011spring
https://www.nxtbook.com/dawson/greenroofs/lam_2011winter
https://www.nxtbook.com/dawson/greenroofs/lam_2010fall
https://www.nxtbook.com/dawson/greenroofs/lam_2010summer
https://www.nxtbook.com/dawson/greenroofs/lam_2010spring
https://www.nxtbook.com/dawson/greenroofs/lam_2010winter
https://www.nxtbook.com/dawson/greenroofs/lam_2009fall
https://www.nxtbook.com/dawson/greenroofs/lam_2009summer
https://www.nxtbook.com/dawson/greenroofs/lam_2009spring
https://www.nxtbook.com/dawson/greenroofs/lam_2009winter
https://www.nxtbook.com/dawson/greenroofs/lam_2008fall
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