I don't think anyone can confidently answer this question, but it won't do you any harm to try. And you can get seeds expressed to you from https://www.shamansgarden.com/p-251-rivea-corymbosa-seeds-ololiuqui.aspx (Some years back, I asked three seed suppliers about storage. None recommended freezing; all recommended a cool dark place; all said that six months was probably the max before potency diminished. However, I'm not really sure that they actually know, and it is of course in their business interest to put a shorter duration than might be true (if they know).)