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Best soil chemistry for roses: Roses seem to grow best in soil that has a chemical pH of about 6.5.
Poinsettias are not poisonous:Scientific research from The Ohio State University has proved the poinsettia to be non-toxic to both humans and pets. All parts of the plants were tested, including the leaves and sap. Rose history in Americas: Around the 16th Century the first cultivated roses were introduced into the Americas.
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