Canola frost damage

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If you are unsure how bad, get a bunch of pin flags, flag 10 plants in an area or 2-3 areas and watch those ten plants over the next 2-4 days for recovery or death. Any green regrowth and you may be fine. Dead ones will simply disappear in two days. You can loose a lot of plants if your establishment was good to start with and still have a good crop if you don't have big dead areas within fields. Also depends on what kind of weed control you may need to keep it clean. Some chemistries suck if your stand is variable.