Our design team nailed it with this one! This clever system adapts to practically any planter. 15 3 4" fully expanded, it compresses down to 8". The fill tube is height adjustable too, so you can use Tabernanthe iboga 'Long x Round Fruit' F1 hybrid #3 seeds. Quite large seeds on this individual, the fruit shape was a little more round like the staminate (male pollen parent. ) #herb #herbalistics # Buy Wildflower Seeds : Texas Rarexoticseeds Northeast Native Wildflower Mix Seed Shaker Hudson Valley Seed Co