Summary: , Osage orange, mulberry, cedar, juniper, Podocarpus, yews, ash, date palms, and even such common garden plants as asparagus. © Thomas Leo Ogren Thomas Ogren is the author of Allergy-Free Gardening , from Ten Speed Press. More than 3,000 plants are individually allergy-ranked (OPALSTM) in this book. Tom does consulting
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