The dude at lowes said two years after I plant the top, hey I don't know but it adds greenery around the pool. If it takes 4 years that's ok, they are cheap enough . Just think it's crazy that all I did was cut off the top of one we devoured and stuck it in the ground and it took root. I planted 6 of them 3 took. Now my orange tree that's a different story, not looking to good. Planted it in June got 2 oranges the size of marbles but they fell off, now the leaves look all wilted so I don't know if it's taken root or not, and of course the mrs threw away the receipt that carries the 1 year warrantee