The Canadian Wheat Board estimated planting in Western Canada has reached 64 percent as of May 25.
The average is 80 percent for this time of year.
The warm weather early last week saw rapid seeding and emergence, but rain and cool weather in Saskatchewan on the weekend stopped planters, the CWB said
Reuters reported that Stuart McMillan, CWB crop and weather analysts, said the wet weather in Saskatchewan is causing concern and might cause producers to start mulling the option of switching acres from durum to spring wheat.
Seeding is more advanced in Manitoba and Alberta.
In the United States, as of May 23, 93 percent of the corn crop was in the ground and soybean sowing was 53 percent complete.
Corn emergence was racing ahead of average, while soybeans were at par.