I had the following reader question
Question: Should I reapply deer repellent after snow?
Answer: No, snow will not affect a well made deer repellent, however deer repellent needs to be re-applied every six to eight weeks in normal circumstances. That being said, a large amount of snow will mean that the lower boundary of six weeks is more appropriate. On the same note a dry winter will allow for longer intervals between application, reaching the eight week mark and maybe longer.
Really you just need to pay attention to how the deer are acting, if you begin to notice any feeding activity it is time to apply more product. Your product is able to withstand the elements especially products I recommend in the post I wrote on deer repellent found here.
Thanks for reading and especially for the inquiry, feel free to contribute below!