You can grow grass and flowers by applying bone meal on grass blocks. This is useful if you're on an older part of the map without grass and want to add some.
It's also VERY useful if you want flowers for dye. It doesn't generate too many flowers, but you get a few from time to time.
EVE Online characters:
Daedalus II ex-CEO TOGOA, Daedalus III slave of Daedalus II
Little Molok Asura Engineer
"Trying is the first step towards failiure" - Homer Simpson