Our Leaf & Flower Catnip is a ground mixture of only the leaves and flowers from the catnip plant. We filter out as much of the stalk as possible, when drying and trimming such large quantities, because the stalk has none of the nepetalactone that attracts the cats! So our Leaf & Flower Catnip is a very potent blend, something you will notice when you examine our catnip. We do offer this blend in a finer ground, and combination blends with silver vine and valerian as well. All four catnip blends are now offered in a 1.25 oz. bag and .20 oz. glass tubes! Once only available as part of our Sampler Set. Who doesn't love options? How to use our catnip: we recommend that you keep your catnip stored in it's airtight bag.