Drought Tolerant = no supplemental water after establishment
Low = 2-3 times per summer
Occasional = every week or two
Moderate = 2-3 times weekly
| Drought Tolerant | ||
|
Acanthus mollis
Bear's Breech
Sn/Par-Shady
Remains evergreen in summer with irrigation. Yarrow
Sun
Flowers in a wide range of colors. Coyote Brush
Sun
Tough plant - withstands harsh conditions. Groundcovers and upright shrubs available. Indian Bean
Sun
A tough, summer-flowering tree for difficult sites. California Lilac
Sn/Par-Shady
Needs good drainage. Huge variety within genus. Generally short-lived. Plumbago
Sun
Clear blue flower in summer followed by red foliage in fall. Rock rose
Sun
Needs good drainage. Australian fuschia
Sn/Par-Shady
Yellow, pink, or orange winter flowers. May be hedged. Washington Thorn
Sun
Spring flowers, fall color, winter berries. Bush Poppy
Sun
Needs excellent drainage Fortnight lily
Sn/Par-Shady
Old stalks will re-flower. Silverberry
Sn/Par-Shady
Tough plant; withstands harsh conditions. Groundcovers and upright shrubs available. Buckwheat
Sun
Rugged; tolerates heat, wind, drought, salt spray. |
Eryngium amethystinum
Sea Holly
Sun
Grown for dramatic foliage and showy bracts around flower heads. California Poppy
Sun
Native has orange flowers. Cultivars available with pink, white, cream, salmon flowers. Blue Fescue
Sn/Par-Shady
Good planted under native oaks Blanket Flower
Sun
Easy-care and long-flowering. Sun Rose
Sun
Brilliant flower display. Should be sheared afterwards to showcase evergreen foliage. Many different flower colors. Toyon
Sn/Par-Shady
Large shrub. Excellent fall/winter interest. Juniper
Sn/Par-Shady
Huge variety, from groundcovers to large shrubs. Many landscape uses. Tolerant of many conditions and useful in hot, sunny sites. Goldenrain Tree
Sun
Yellow flowers in summer followed by lantern-shaped seed capsules. Lion's Tail
Sun
Cut back in winter to renew - may not survive particularly cold, wet winters. Pitcher Sage
Sn/Par-Shady
Remove stems in winter at ground level. Mahonia, Oregon Grape
Sn/Par-Shady
Striking foliage, good flower display and showy berries. Part shade in hottest locations. Monardella
Sn/Par-Shady
Requires fast-draining soil; good in native or rock gardens. Muhly Grass
Sn/Par-Shady
Benefits from occasional summer irrigation |
Muhlenbergia rigens
Deer Grass
Sun
Native; dramatic accent grass, cut back every few years to freshen Oleander
Sun
All parts of plant toxic. Good hedge or screen. Tolerant of many conditions and useful in hot, sunny sites. Oregano
Sun
Cut back in winter to renew. Russian Sage
Sun
Cut back in early spring to renew. Ornamental Laurel
Sn/Par-Shady
Good screen or hedge. Compact version available. Black Oak
Sn/Par-Shady
Leaves emerge in beautiful pinkish hues in spring, mature bright green, and turn yellow-orange in fall. Lavender Cotton
Sn/Par-Shady
Fast growing but short-lived. Trim after flowering, cut back in spring. Checkerbloom
Sun
Pink flowers. Cut to ground and allow to go dormant in summer. Blue Eyed Grass/Yellow Eyed Grass
Sn/Par-Shady
Several cultivars available, some variegated. Globe Mallow
Sun
Cut to ground in early spring; little to no summer water only. Coast Rosemary
Sun
White or pale blue flowers. Tolerates harsh conditions. Good drainage. Yucca
Sun
Some species form woody trunks. California Fuschia
Sun
Cut back after bloom to renew. Attractive to pollinators. |
| Low | ||
|
Acca sellowiana
Pineapple Guava
Sun
Prune lower branches to train as small tree. Hyssop
Sn/Par-Shady
Cut to ground in late winter. Artemisia
Sun
Evergreen. Barberry
Sn/Par-Shady
Some have berries in winter. Many attractive foliage colors such as lime and burgundy. Cedar
Sun
Cedars need plenty of space; weeping forms need training. Western Redbud
Sn/Par-Shady
Can be grown as a large shrub or small tree. Chitalpa
Sun
Choose 'Pink Dawn' or white blooming 'Morning Cloud' Smoke Bush
Sn/Par-Shady
Can be pruned to control size and shape. Excellent fall color. Seaside Daisy, Mexican Daisy
Sn/Par-Shady
Cut back in winter to renew; most flower year-round . Spurge
Sn/Par-Shady
Some reseed but seedlings are easy to pull out. Huge size variation amongst species. Gaura
Sn/Par-Shady
Willowy stems hold pink or white flowers; reseeds easily. |
Kniphofia spp
Red Hot Poker, Torch Lily
Sn/Par-Shady
Attractive to hummingbirds; groom in spring to maintain appearance. Crape Myrtle
Sun
Decorative bark, summer flowers, and striking fall color. Sweet Bay
Sun
Can be grown as a tree or shrub. Magnolia
Sn/Par-Shady
Deciduous types are often called tulip trees for the shape of their white,yellow or pink flowers. Hollyleaf Osmanthus
Part Shade
Good hedge or screen, in shrub border or woodland garden.
Pelargonium
Scented Geranium
Sn/Par-Shady
Aromatic foliage shunned by deer; some types are variegated. Fountain Grass
Sn/Par-Shady
Large, feathery plumes; clumps enlarge each year Photinia
Sn/Par-Shady
Bright red new growth, spring flowers, fall berries. Can prune to control size and shape. Constant leaf drop. Pittosporum
Sn/Par-Shady
Great hedge, screen or windbreak. Glossy foliage, tiny fragrant flowers in spring. Indian Hawthorn
Sn/Par-Shady
Long bloom period spring-fall. Flowers pink or white. Sumac
Sun
Brilliant fall color; some species spread by suckering. |
Rosmarinus officinalis
Rosemary
Sun
Varies from groundcover to upright or trailing shrubs. Blue flowers in winter attract butterflies and bees. Sage
Sn/Par-Shady
Huge genus with much variation. Virtually all suitable for Bay Area. Sweet Box
Part Shade
White, fragrant flowers, berry-like fruit. Good drainage Moor Grass
Sn/Par-Shady
Yellow seed heads contrast with pale green foliage Potato Vine
Sn/Par-Shady
Blue or white flowers, long summer bloom. Cut back to renew. Spirea/Bridal Wreath
Sn/Par-Shady
Beautiful sprays of white or pink bloom in spring. Dwarf forms available. Lamb's Ears
Sn/Par-Shady
Many cultivars. Heavy rains in winter can shorten life. Foliage has beautiful color and texture. Germander
Sn/Par-Shady
Some are large and shrubby, others much smaller. Thyme
Sn/Par-Shady
Genus includes ground-covers and upright or mounding perennials. Star Jasmine
Sn/Par-Shady
Fragrant white flowers, good fall/winter foliage. |
| Moderate | ||
|
Abutilon spp.
Flowering Maple
Sn/Par-Shady
Much variety within genus. Can be pruned as shrub or small tree. Flowers year-round. Part shade in hottest locations.
California Pipe Vine
Part Shade
Slow to establish. Pipe vine swallowtail butterfly larva feeds solely on aristolochia. Milkweed, Butterfly Weed
Sun
Cut to ground in late winter. Michaelmas Daisy
Sn/Par-Shady
Cut to ground in late winter. Bergenia
Sn/Par-Shady
Evergreen. Blue Grama
Sn/Par-Shady
Reddish flower heads in summer. Butterfly bush
Sn/Par-Shady
Prune to 6 inches from the ground in early spring to encourage bloom and control shape. Box
Sn/Par-Shady
Slow growing. Classic hedge plant Feather Reed Grass
Sn/Par-Shady
Forms dramatic narrow clumps, attractive flowers. Bottle Brush
Sn/Par-Shady
Some varieties frost-tender. Sedge
Sn/Par-Shady
Brown or green leaved varieties provide contrast in color and texture. Bush anemone
Sn/Par-Shady
Needs good drainage. Bluebeard
Sun
Cut just above ground in early spring. Dusty Miller
Sun
Flowers in summer; foliage attractive year-round. Mexican Orange
Sn/Par-Shady
Fragrant white flowers late winter/early spring. Part shade in hottest locations. Orange, Lemon, etc
Sun
Dwarf varieties available for containers or patios Pacific Dogwood
Part Shade
Dislikes excessive watering, fertilizing and pruning. |
Daphne odora ‘Aureo-marginata’
Winter Daphne
Part Shade
Compact forms available. Extremely fragrant flowers Western Bleeding Heart
Part Shade
Dormant in summer with no water. Heath
Sn/Par-Shady
Prefers acid soil with organic content. Some frost tender
Eriobotrya spp
Loquat
Sn/Par-Shady
Edible fruit produced in abundance on E. japonica; E. deflexa is fruit-less. Escallonia
Sn/Par-Shady
Good hedge or screen. Long summer bloom. Can die back in hard freeze, generally recovers. Winter Creeper
Sn/Par-Shady
Huge variety, from groundcovers to large shrubs. Many landscape uses. Idaho Blue Fescule
Sn/Par-Shady
Small, low clumps need replacing every few years Cranesbill, Hardy Geranium
Sn/Par-Shady
Plants in some shade require less water. Many cultivars available. Hebe
Part Shade
Many varieties. Good as accent plants or small hedges. Blue Oat Grass
Sn/Par-Shady
Golden flower stalks contrast with blue foliage Hellebore
Sn/Par-Shady
Water requirements vary greatly by species. H. argutifolia, foetidus, lividus and sternii most drought-tolerant. Coral Bells
Part Shade
Non-native species require more water, typically have dramatic foliage. Oak Leaf Hydrangea
Sn/Par-Shady
Only hydrangea that tolerates sun and dry conditions. Dramatic flowers, interesting bark and good fall color. Kerria
Sn/Par-Shady
Beautiful flowers, lovely in woodland garden or shrub border Chinese Flame Tree
Sun
Red-spotted yellow flowers in summer followed by rose-colored papery seed capsules. Tea Tree
Sun
Protect from hard frost. Dramatic bloom in white, pink or red. Luma
Sn/Par-Shady
Beautiful bark, good hedge or screen or specimen plant. |
Miscanthus sinensis 'Adagio'
Maiden Grass
Sun
One of the most well-behaved Miscanthus. Pacific Wax Myrtle
Sn/Par-Shady
Good hedge or screen. Birds are attracted to berries. Myrtle
Sun
Good in mixed or shrub border, small hedge or specimen planting. Good drainage.
Nepeta spp
Catmint
Sn/Par-Shady
Cut back in winter to renew. Penstemon
Sun
Cut back in winter to renew; native species require lean soil and little water. Wild Mock Orange
Part Shade
Single, pure-white flowers. Lovely accent shrub. New Zealand Flax
Sn/Par-Shady
Good drainage. Some varieties are huge, many different foliage colors available. Great accent plants. Cinquefoil
Sn/Par-Shady
Long bloom period spring-fall. Many flower colors. Decorative. Pomegranate
Sn/Par-Shady
Summer flowers followed by fall fruit. Flowering Currant
Sn/Par-Shady
Flowers pink, yellow or white in spring; attracts hummingbirds. Black-Eyed Susan
Sun
Cut to ground in late winter. Stonecrop
Sn/Par-Shady
Huge genus with much variation. Virtually all suitable for Bay Area. Fringe Cups
Part Shade
Foliage resembles piggy-back plant. Society Garlic
Sun
Faint aroma of garlic; long bloom period spring through fall. Mullein
Sun
Many cultivars. Short-lived but re-seeds. Dramatic shape and foliage. Viburnum
Sn/Par-Shady
Many have striking fall color and dramatic spring bloom. Many large cultivars, compact forms available. |
| Occasional | ||
|
Arbutus marina
Arbutus
Sn/Par-Shady
More tree-like than Strawberry Tree (A. unedo) with prettier rose-pink flowers late summer to winter. Strawberry Tree
Sun
Compact forms available. White flowers, red, orange, gold berries. Decorative peeling bark. Manzanita
Sn/Par-Shady
One of most garden tolerant manzanitas. Flowering Quince
Sn/Par-Shady
Fruit used for preserves. Flowers late winter. Cypress
Sun
Scale-like foliage similar to juniper. Hop Bush
Sn/Par-Shady
Can be pruned to control size and shape. Good screen or hedge. Island Snapdragon
Sn/Par-Shady
Frost tender but will recover Silktassel
Sn/Par-Shady
Winter catkins dramatic. Can be pruned to control size and shape. Silk Oak
Sun
Fast-growing, bright golden flowers in summer. Leaf drop can be messy. |
Iris spp
Iris
Sn/Par-Shady
Native types take full sun along coast, some shade inland. Lavender
Sun
Cut back in winter to renew - plants generally need replacing in 4-6 years. Heavenly Bamboo
Sn/Par-Shady
Flowers, persistent red berries, less water if shaded. Olive
Sun
Fruitless and dwarf varieties available. Phlomis
Sn/Par-Shady
Showy spring display of yellow flowers. Wooly gray-green leaves. Chinese Pistache
Sun
Fall color bright orange/red. Coffeeberry
Sn/Par-Shady
Excellent hedge, screen or specimen. Prune to control size and shape. Some varieties have showy berries. Lemonade Berry
Sn/Par-Shady
Can be frost-tender inland, spring flowers, summer red fruit. Sugarbush
Sn/Par-Shady
Attractive foliage, good form. |
Senecio spp
Dusty Miller
Sn/Par-Shady
Classic dusty miller foliage; renew by shearing annually. Dusty Miller
Sn/Par-Shady
Palest white of Dusty Millers; pinch stem tips to encourage compactness. Snowberry
Part Shade
Spring flowers followed by long-lasting dramatic white berries. Mexican Bush Marigold
Sn/Par-Shady
Intensely fragrant foliage; cheerful golden-yellow flowers; prune annually. Verbena
Sn/Par-Shady
Some cultivars require more water. Most short (ex V. bonariensis up to 6'). Chaste Tree
Sun
Blue, white or pink flowers bloom in late summer when most other plants are past their prime. California Wild Grape
Sn/Par-Shady
Named cultivars available, brilliant fall color. Wisteria
Sn/Par-Shady
Prune back after bloom to control size and encourage flowering. Aggressive but beautiful. |
Remember that water requirements, as well as sun will vary by micro-climate within the county.