This was (is) my first year to grow "Cosmos".....I planted it from seeds that I purchased from Wal-Mart and have had mixed results. Some of the plants grew very tall (4 feet) with no blooms at all. Some grew less than 30cm, Some had bloom buds, but never opened up with petals. Over all, my experience is that they are not as reliable as Zinnias for lots of color in a flower bed. I do like the feathery foliage!