SimonV wrote:I would like to see a list of acidic soil-loving roses.
I have no experience with acid soils, aside from a couple of failed attempts with carnivorous plants. From what I've been able to glean from various reports, tolerance of low pH is not a simple thing -- tolerant plants may be tolerant in different ways. Aluminum and manganese poisoning are common problems, if those minerals are present.
As for roses, I've found two North American species that are reportedly tolerant, but the tolerance is not general -- some accessions are more tolerant than others. The fact that one accession of Rosa woodsii
was found on very acid soil tells us nothing about other populations that are growing in lime-rich soils. And I don't know whether sphagnum bogs contain much Al or Mn. If not, the acid tolerance of R. nitida
might not be helpful where those elements are present.
Rhodora, 20(233): 90-96 (May 1918)
ROSA BLANDA AND ITS ALLIES OF NORTHERN MAINE AND ADJACENT CANADA.
M. L. FERNALD
In the calcareous area to the north and northwest, however, from the St. John valley in Maine to Gaspé and Anticosti, these species are practically unknown (with the exception of rare colonies of R. nitida in sphagnous bogs and local colonies of R. palustris in the Devonian sandstones about Gaspé Bay)http://bulbnrose.x10.mx/Roses/breeding/ ... a1918.html
United States Department of Agriculture
NATURAL RESOURCES CONSERVATION SERVICE
Plant Materials Technical Note No. 97
PLANT MATERIALS TECHNICAL NOTE
Acid and Heavy Metal Tolerant Plants for Restoring Plant Communities
in the Upper Clark Fork River Basin
Joe LeFebvre, Project Leader
Integration of Selected Native Plant Materials for Enhanced Restoration Activities in the UCFRB
Woods' rose, Rosa woodsii (accession number 9081638), is a spreading to erect, long-lived shrub native to the central and western U.S. and Canada. Woods' rose is a widely adapted species and grows in many habitat types. It is an understory plant in dry and moist forest communities, and also grows in sagebrush, juniper, mountain, plains and desert grasslands, prairie and alpine habitats. It primarily grows on upland sites, but can be found in wetlands, riparian areas, marshes, and along lakeshores. Woods’ rose is an excellent plant for re-vegetating disturbed sites because it produces rhizomes, regenerates quickly, and has excellent survivability. It can be used to rehabilitate mine spoils and road cuts, control soil erosion on hillsides, and stabilize eroded stream banks. NRCS−Montana−Technical Note−Plant Materials−MT-97 16
The original collection site, with a soil surface pH of 4.53, has an average annual precipitation of 10 to 14 inches, and an elevation of 5,168 feet. In the fall of 2000, Woods' rose was planted at the Mill Creek Woody CEP approximately four miles southwest of Anaconda, Montana. It was selected for its superior adaptation to moderately acidic and heavy metal-laden soils.https://www.nrcs.usda.gov/Internet/FSE_ ... n12232.pdf