I'll be trying this combination again because when it works - when the tigridias and the ageratums are blooming freely together - it's very striking.
The ageratums used this time are of two taller sorts, 'Leilani Blue' and 'Blue Horizon'. These are standard cut-flower versions of the plant most people know only in its dwarf edging forms. The flowers are sweetly scented, and the scent carries well on the air. It reminds me of the aroma of the candy known as Jordan almonds.
Ageratum is typically pronounced aj-a-RAY-tum, although it's properly a-GER-a-tum.