Fog hardy, slow basally clumping to 5ft x 10ft wide
Cactus and Succulents - Ultra Soil Blend
Oreocereus trollii
Andean, fog hardy. Exceptionally attractive white-furred and bronze-spined cactus from high altitudes where the hairs will protect it from UV and frosts. Slowly clumping to 30″t. Red flowers.
Ornithogalum caudatum
Winter-growing bulb, 4″ caudex, w/strappy leaves to 3ft.
Ornithogalum dubium
Beautiful spring bulb in the Scilloideae subfamily. Summer dormant. Has large sprays of orange or yellow flowers in the spring, strappy leaves through the winter. Frost tender. Can be unplanted for winter, replanted in spring. Keep dry when dormant.
Ornithogalum fimbriatum
Beautiful spring bulb in the Scilloideae subfamily. Summer dormant. Has initial low sprays of flowers in late winter, and a 2nd tall bloom stalk with large sprays of white flowers in the spring, strappy leaves through the winter. Frost tender. Can be unplanted for winter, replanted in spring. Keep dry when dormant.
Ornithogalum saundersiae
Hyacinth bulb, 5ft. stalks w/white flowers, black centers Late winter blooming.
Orostachys iwarenge
Groundcover, lots of plantlets, pyramidal bloom stalks.
Orostachys japonica
Unusual rosette-forming succulent with pyramidal bloom stalks. Large clusters. Monocarpic, will bloom in the 2nd or 3rd year.
Ortegocactus macdougallii
Small, globular, to 2″across; black-tipped spines; requires limestone in soil.
Oscularia caulescens
Pairs of triangular leaves densely packed on stems. Blue-green leaves get purple edges in full sun. Reddish stems will get woody as they age. Small purple flowers in mid summer open in late afternoon heat. Grows 8-10″ tall, will spread 6 feet wide. Propagate by taking cuttings from new, soft stem tips only.
Oscularia deltoides
Low shrub; purple stems, boxy grey-green leaves. Winter-growing. Will get covered in small lavender daisy-like flowers in spring through the summer.
Othonna capensis
Small thickened oval leaves turn purple in sun. Low-growing groundcover succulent daisy (Asteraceae) with daisy-yellow flowers. Can be used in hanging baskets or rock gardens to trail.
Othonna capensis “Ruby Necklace”
Small thickened oval green leaves with purple trailing stems. Low-growing groundcover succulent daisy (Asteraceae) with daisy-yellow flowers. Can be used in hanging baskets or rock gardens to trail.
Othonna herrei x cremnophila
Thick stems, branches, squat and shrubby. Large thick green leaves. Large sprays of yellow flowers.
Othonna lobata
Small irregular caudex, lots of shrubby branches with strappy green leaves and white or yellow daisy flowers. Grows in rocky outcrops, often in sandy soils. Winter-spring flowers.
Oxalis adenophylla
Alpine, semi-succulent, with pink-tipped white flowers. Prefers full sun, but can handle some light shade.
Oxalis carnosa
Forms 2″ caudex, fleshy erect stems; grows full and bushy
Oxalis fabifolia
O. flava v. fabifolia
O. fabaefolia
Long strappy leaves, lemon-yellow flowers. Small bulbs, summer dormant.
Oxalis flava
Small succulent bulb with thickened leaves. Variable flowers – yellow, white and some purple. Rocky soils with some sand.
Winter growing, spring-summer flowers.
Oxalis flava v. lupinifolia
Small succulent bulb with thickened leaves. Rocky soils with some sand. Flowers range from white and yellow to full pink. Winter growing leaves, can bloom first in fall, or spring flowers before going dormant in summer.
Oxalis gigantea
This unusual Oxalis has twisting vertical branches that are leafless most of the year. In winter the stems are covered in tiny succulent leaves and tons of bright yellow flowers.
Oxalis herrerae
Succulent species with swollen petioles to 3ft. tall
Oxalis namaquana
Large yellow flowers winter thru spring, some can bloom year-round. Palm-like leaves on upright stems. Keep dry when dormant in summer.
Oxalis palmifrons
Winter growing bulb with light pink flowers. Amazing palmate leaves. Will go dormant in the summer heat.
Oxalis peduncularis
Small vibrant yellow flowers with dark red sepals. Grows wide and shrubby, to 12″h. Will bloom year-round with enough sunlight except when dormant.
Oxalis tetraphylla deppei
Small succulent bulb with clover leaves. Grows and flowers, pink flowers, spring through summer, bulbs multiply by fall. Dormant in winter. Can overwinter, but does best if you bring it in when cold.
Oxalis vulcanicola
O. spiralis ssp. vulcanicola
Small semi-succulent species with small clumps of reddish leaves
Pachycereus marginatus
Large straight and vertical stems to 12ft, can get to 20ft. Branch from the base. Small funnel-shaped rose flowers.
Pachyphytum bracteosum
Small and shrubby with ovate leaves.Grows in limestone cliffs of Mexico.
Pachyphytum compactum
Soft bluish color, Short thick waxy leaves; tight clumps of small rosettes
