Home › Forum topic › Propagation, Germination Testing, & Horticulture › Has anyone had to modify (substantially) conditions in your garden to support growth of a rare plant species? Tagged: garden, plants Viewing 1 post (of 1 total) Author Posts August 29, 2019 at 2:03 pm #418 Joyce MaschinskiCPC Conservation Officer Please share your examples. At The Arboretum at Flagstaff our garden soil was volcanic, but we had many rare species that required limestone soil. We created a limestone mound along a planned garden path to support several rare limestone species in the region. Author Posts Viewing 1 post (of 1 total) This topic has 0 replies, 1 voice, and was last updated 5 years, 3 months ago by Joyce Maschinski. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In