Silybum marianum is a BIENNIAL growing to 1.2 m (4ft) by 1 m (3ft 3in) at a fast rate. It is hardy to zone (UK) 7 and is not frost tender. It is in leaf all year,
Silybum marianum is a BIENNIAL growing to 1.2 m (4ft) by 1 m (3ft 3in) at a fast rate. It is hardy to zone (UK) 7 and is not frost tender. It is in leaf all year,