When stored consistently in a cool, dark place, you can expect our oils to stay good for at least 12 months after purchase. The CBDa will slowly convert to CBD over time. If stored in a cool dark place, after 16 months your Circle Labs CBDa will be roughly 66% CBDa and 33% CBD.  We make small batches and do not keep a large inventory so you can be assured that when you purchase a bottle of Circle Labs Whole Flower CBD or CBDa Oil from us or any of our suppliers, it has been freshly made.