Euphorbia characias ssp. wulfenii
Large stalks of many yellow flowers and evergreen blue-gray foliage. A large handsome species with a shrubby habit growing up to four feet tall. The plant can bloom almost any time during the year with lime-yellow 'flowers' produced in large full clusters. Used often as a sculptural and architectural focus in the landscape. Makes an interesting cut flower also, but some people are sensitive to the sap.
Just cover seeds and use 55-65F. Germination is spread-out over many weeks.