Starter fertilizer is typically considered to be the placement of a small rate of fertilizer, usually nitrogen (N) and phosphorus (P), near the seed at planting time.

To maximize the yield potential of winter canola, producers should topdress with nitrogen, sulfur, and possibly boron in the winter. Producers should make topdress applications with consideration for the environmental conditions, the nutrients needed, and the application method, say experts at Kansas State University Extension.