The graph below shows the number of plant species that tolerate each soil pH, from 3.5 to 10.0. In this analysis, pH tolerance data was available for 5336 plants. 4251 of those plants tolerate a pH of 6.5 (slightly acid).
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| pH | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | 9.0 | 9.5 | 10.0 | ||||||||||||||||||||||||||||||