Can be used as a liquid fertiliser, or layer leaves through the compost heap, as will increase the breakdown of your garden waste. Be careful as it can be invasive.
Type: Hardy Perennial
Height: 1m
Spread: 1m+
Soil type: Prefers moist soil but will tolerate almost anything!
Aspect: Full sun/light shade/shade 
Flower colour: Purple 
Flowering time: Summer