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Oenothera kunthiana 'Glowing Magenta'

(Glowing Evening Primrose)

Rose-pink flowers to 6 inches. Very drought tolerant. Sun.

Zone 7

Oenothera tetragogona 'Sundrops' (Evening Primrose)
Brilliant yellow 1½ inch flowers open during the day. 1-3 ft. 
Whole plant is Edible. Sun to light shade. Zone 7

Omphalodes cappadocica 'Blue Eyes' (Blue-Eyed Boy)        
Sweet-smelling bright blue flowers on 12 inch stems in Spring. Excellent for cutting. Reseeds freely. Shade to partial Sun. Zone 7

Omphalodes cappadocica 'Starry Eyes' (Venus' Navelwort)
Sky blue flowers edged in pink, fading to white. Moist soil. Shade to partial Sun. Zone 7

Omphalodes cappadocica 'Lilac Mist' (Lilac Navelwort)
Pale lilac flowers on glossy green foliage. Zone 5-9     

Ophiopogon jaburan 'Variegata' (Variegated Mondo Grass)
Chalk white flowers in nodding clusters on striped foliage, which is 6 inches to 1 ft tall. Metallic violet-blue fruit follows. Partial sun to shade. Zone 7

Ophiopogon japonicus 'Nana' (Dwarf Mondo Grass)
Evergreen, 2 inch tall grass-like foliage, with lilac flowers that become bright blue berries. Zone 5. Partial sun to shade.

Ophiopogon japonicus 'Pam Harper'

(Variegated Dwarf Mondo)

Bright Cream and green blades with lilac flowers and blue berries on 3-4 inch plants. Partial shade to sunny spot. Zone 7   

Ophiopogon japonicus (Mondo Grass)
Dark green 6 inch foliage with blue berries. Best in partial shade. Zone 7

Ophiopogon planiscapus 'Nigrescens' (Black Mondo Grass)
Black blades with Lilac flowers and blue berries to 8 inches. Best in partial shade. Zone 7

Opuntia polyacantha 

(Prickly Pear Cactus)

Yellow flowers on spiny rounded foliage to 6 inches.

/well-drained soil and Sun.

Zones 4-11

Origanum laevigatum 'Hopley's'    (Hopley's Marjoram)    Fragrant, edible herb with large purple flowers to 2 ft. Attracts bees and hummingbirds.    Sun. Zone 7    

Origanum v. 'Aureum' (Golden Oregano)

Bright yellow-green foliage. An excellent ground cover or as an edible herb. Sun to partial shade. Zone 7  

Origanum vulgare ssp hirtum (Pizza Oregano)
Intensely fragrant, compact, edible foliage. Mostly white flowers June - Oct. Best in Sun. Zone 4-8

Oxalis oregana (Oregon Wood Sorrel)          
Naturalizes easily. Pink flowers in spring. Shade. Zone 7

Oxalis triangularis (Purple Sorrel)

Large purple triangular foliage in threes up to 6 inches. 

White flowers sit above foliage.

Best in partial shade. Zone 7