With Kenya trees you start with one tree and in a matter of months you have MANY trees. They drop little branches all the time so you have a constant supply of Kenya trees..... you can put the end of it into a crack or crevice of your rock with lowered flow for a day or so and it will attach to your rock....I have them on my glass, on shells, on rock etc etc...wherever they blow to with the current they attach and grow and...make more.