Patience Rather Than Panic

Resist the urge to re-seed immediately after this frost, as recovery can turn out to be better than expected. Wait at least three to four days to determine if the growing point is still intact and new green growth is visible. The frost may thin the stand only, especially in low lying areas. As a guide, a reasonable plant population early in the season is three to four plants/ft². However, one to two plants/ft² across the majority of a field can be adequate if managed carefully with today’s herbicide tolerant systems. Thin stands such as these can yield up to 90% of a normal stand seeded at an early date but will be later in maturity. Crops re-seeded late in the season typically yield less than earlier seeded that had thin stands. For example, one case study by the Canola Council of Canada showed a 7.4 bushel/acre advantage when a crop was not re-seeded after a frost. It likely will be better to leave a thinner stand (provided it is reasonably uniform) than take the risk of late re-seeding because maturity/early fall frost becomes a concern.