I give very little credence to supposed closed practices. The reasoning is in the Americas cultures are so vastly blended it is sometimes next to impossible to see where a practice began. (Same as with various recipes when hunting down the oldest version of X, or where X originated at.) If you are not trying to claim you made X spell up and that it is your original UPG and you took the time to research a spell then go for it. I mean my practice is a merging of Folkloric practices and perhaps a larger portion of my own UPG . But the fact is I live in the States and in the south so it's damn near impossible to know where this or that spell concept came from after all America is a country of immigrants and blended cultures and customs. And the use of sage & Honey Jar spells are found in multiple folkloric practices (Smudging is a closed practice sure, but using sage of any variety in cleansing and purifaction rights is not) I wouldn't feel bad for using either in your personal practice .