This paper will examine the manuscript evidence for Philo’s treatise De plantatione. Although the treatise is preserved in five manuscripts, the text as printed by Wendland (in the Cohn-Wendland edition) often departs from these manuscripts. Sometimes he prints his own conjectures, and he includes many more in the apparatus for consideration. Sometimes he follows conjectures by Mangey and others. And sometimes, including some very interesting places, he follows the testimony of Eusebius. Quite a few of the textual variants involve substantial and unusual changes in wording. This paper will survey the textual issues, and examine in detail some of the more perplexing textual problems within this work.