Valerian root has a calming and sedative effect, use as a cure for insomnia, cats are also attracted to the roots. The flowers also have a lovely sweet scent that wafts across on the breeze.
Type: Hardy Perennial
Height: 1.5m 
Spread: 1m
Soil type: Moist soil
Aspect: Full sun/Light shade  
Flower colour: White/pale pink
Flowering time: Summer