Leftover Light Mountain Henna Indigo mix, can I store the leftovers?

I have leftover Light Mountain medium brown. The ingredients on it are: Indigofera tinctoria (indigo) leaf powder, Lawsonia inermis (henna) leaf powder, Cassia auriculata (senna) leaf powder, Phyllanthus emblica (amla) fruit powder. Can I use this again at some point if I freeze it? Or is it better to throw this out and just get a new one when I have to recolor? Since it’s a henndigo mix, I’m not really sure how those are stored and if freezing is an option. Thanks!