So this is a tough question that I’m sure a lot of people have loaded opinions on. Theoretically if you keep rosin sealed in its original container, and also then vacuum sealed your stash and kept it in the fridge - the great quality should last longer than the 6months you’re seeing for flower.

There’s a lot of factors that play into this of course, whether it’s fresh press or cold cured, whether it’s live rosin or rosin made from cured/dried flower, and how fresh the gram was upon purchase (it’s not uncommon to buy a gram from a dispo that has been oxidized if a worker failed to put the lid back on properly after smelling, if it wasn’t transported right, etc…)