A low maintenance perennial that is a striking addition to any cottage garden large border verbascum olympicum rockets to up to 2 metres in height with buttery yellow flower spikes growing from a basal foliage of silver felted leaves it tends to bloom in it39s third year then dies after that however it is a vigorous self45seeder which means other new plants can grow alongside it ready to carry on producing massive summer displays of colour in following years it grows well in poor