Acid-Loving Trees and Shrubs (click here for printer-friendly version)
The following plants are thought of as "acid-loving", that is, they grow better in soils with pH lower than the 6-7 range preferred by most. Canadian peat, sulfur and acidifying fertilizers may be needed.
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Heath Heather Hemlock Holly Huckleberry Hydrangea Inkberry Itea Leucothoe Magnolia |
Mountain-ash Mountain-laurel Pieris Pin Oak Pine Raspberry Red Oak Rhododendron Spruce White Cedar |
This article gives more information about iron chlorosis in trees and shrubs: University of Illinois Extension bulletin 603.pdf
Good references such as Michael Dirr's Manual of Woody Landscape Plants give pH requirements of specific trees and shrubs.