Agapanthus 'Silver Moon' has variegated leaves light lavender-blue flowers in rounded clusters.

Agapanthus 'Stevie's Wonder' is a relatively large, hardy lily-of-the-nile with dark purple-blue flowers over lush green strap-like leaves.

Agapanthus 'Storm Cloud' has deep cobalt blue flowers held in loose spheres atop subtropical foliage. Great in pots or in the ground.

Agapanthus 'Summer Love Blue' has fragrant violet-blue flowers on strong green stems and green, strap-like foliage.

Agapanthus 'Summer Skies' has light blue flowers with dark blue streaks on tall sturdy stems rising above green strap-like foliage.

Agapanthus 'Twister' is a striking bicolour lily-of-the-nile with rich blue and white flowers.

Agapanthus 'Valencia' offers sky blue flowers with darker veins and reverses on dark stems.

'White Heaven' produces large heads of white flowers.

Agastache 'Golden Jubilee' blooms for ages with blue-purple spikes attracting pollinators from miles around atop gold foliage.

Agave albopilosa 'Tufts' is a rare, dwarf century plant with stiff, dark green leavestipped with white hairs like little cotton balls!

A classic blue agave forming large specimens.

Bluish green foliage edged in yellow. A very popular agave, great for dramatic containers.

Agave angustifolia is the main species, known as espadin, used to make mezcal, the sister liquor of tequila.

Agave angustifolia var. letonae has long, sword-like leaves in shades of green to grey-green and can develop nice trunks.

Agave bracteosa 'Calamar' looks more marine-like than plant-like with long, narrow, notably spineless, bluish to apple green leaves.

Agave bracteosa 'Monterrey Frost' is a small, spineles cultivar perfect for pot culture or protected microclimates.

Agave chrysantha has long, narrow, bluish leaves with bold marginal spines. The flowers are bright yellow.

Agave deserti var. simplex is a small to medium-sized century plant with silver-blue leaves.

Agave filifera var. schidigera has green leaves marked with silver-white and with curling threads along the leaf edges.

Agave funkiana 'Fatal Attraction' offers handsome bluish green leaves striped with a mid green central band.

Narrow, emerald green, spineless leaves give Agave 'Spaghetti Strap' a unique look.