Galium odoratum
Common Name : sweet woodruffFamily : RubiaceaeType : Herbaceous PerennialHabit : Mat formingHeight : < 10 cmSpread : 10-50 cmFlower colour : WhiteFlowering from : Mayto JuneFoliage : DeciduousFoliage colour : GreenSunlight : Part ShadeMoisture : Moist but well-drainedSoil : Acid / Neutral / AlkalineSeason of interest : Spring - SummerFragrant
G. odoratum is a vigorous rhizomatous perennial forming a wide mat of erect stems to 30cm, bearing whorls of bright green, lance-shaped leaves, hay-scented when dry, with terminal clusters of small white, starry flowers from late spring. [RHS]