tag:blogger.com,1999:blog-20376475105239081.post4161656778549268770..comments2023-03-26T02:27:46.476-07:00Comments on Five Girls and their Guy: Last two weeks of JuneUnknownnoreply@blogger.comBlogger1125tag:blogger.com,1999:blog-20376475105239081.post-57734163297521725662013-07-24T06:21:19.882-07:002013-07-24T06:21:19.882-07:00Hydrangia color is influenced by the availability ...Hydrangia color is influenced by the availability of aluminum in the soil, which you can change by adding aluminum sulfate, and/or you must also decrease the pH of your soil to make aluminum available to your plant. If you teach biology, it's one of those cool examples of gene-environment interactions. :)<br /><br />Randyhttps://www.blogger.com/profile/08575833629855297875noreply@blogger.com