Every garden needsa plant that shouts 39look at me39 so a verbascum olympicum is a worthy contenderit will tolerate conditions that other plants would find hard to thrive in such as hot and dry borders and poor soil and will quickly grow to 2 metres tall the felted silver rosette of basal foliage forms a backdropto tall spikes of buttery45yellow flowers although verbascum olympicum or olympian mullein is a hardy perennial it may not bloom until it39s third year and often dies