Bulletin #2438, Potato Facts: Spring Canola: An Oilseed Crop for Potato Growers (PDF) By Peter Sexton, Extension Crops Specialist For information about UMaine Extension programs and resources, visit extension.umaine.edu. Find more of our publications and books at extension.umaine.edu/publications/. Table of Contents: Introduction Planting Date and Conditions Seeding Pattern and Rate Seedbed Preparation and Seeding Depth