You can absolutely freeze flower for washing! So the problem I hear with fresh frozen (as in chopping the plant down, cutting into manageable pieces to fit inside a ziploc and freezing) usually has a much smaller return. I forget who it is, but he talks about hang drying for 2-4 days depending on the strain, then freezing it as it ups his returns significantly but doesn’t sacrifice terpene quality as only a little degradation occurs. Of course this is strain dependent. I had to freeze a plant once, the fresh frozen bubble was super blond and extremely tasty but extremely dissatisfying yield, albeit better than letting my bud go super dry being away so long. I’m gonna try the 2 day dry and trim off lower buds I want to freeze