rabbit brushChrysothamnus nauseosusShrub, California native- NC×
- CV×
- SCVL
- SIL
- HDVL
- LDL
Plants starting with R: water needs by California climate zone
Each plant shows its water use rating for each of the six California climate zones. Minutes opens the sprinkler calculator with the plant and a climate city preset.
rabbit brushChrysothamnus nauseosusShrub, California native- NCM
- CV?
- SCH
- SIM
- HD?
- LD?
rabbit's foot fernPhlebodium aureum (Polypodium aureum)Perennial- NCM
- CV?
- SCM
- SIM
- HD?
- LD?
Radiant manzanitaArctostaphylos uva-ursi 'Radiant'Ground cover, California native- NCL
- CVM
- SC?
- SI×
- HD×
- LD×
ragged leaf bahiaBahia dissectaPerennial- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
ragged rock flowerCrossosoma bigeloviiShrub, California native- NC?
- CV?
- SC×
- SIL
- HD?
- LD?
ragwortLigularia przewalskiiPerennial- NCH
- CV?
- SCH
- SIH
- HD?
- LD?
Raleigh westringiaWestringia brevifolia var. raleighiiShrub- NCL
- CV?
- SCL
- SI?
- HD×
- LD?
rama pardaRuellia californicaShrub- NC?
- CV?
- SCVL
- SIM
- HD?
- LDL
Rancho Tambor AgaveAgave titanota 'Snaggle Tooth'Succulent- NCVL
- CVVL
- SCL
- SIVL
- HDVL
- LDVL
raspberry fuzziesAcalypha monostachyaShrub- NC×
- CV×
- SC?
- SI?
- HD×
- LDL
Ray Hartman ceanothusCeanothus 'Ray Hartman'Shrub, California native, Arboretum All-Star- NCL
- CVL
- SCL
- SIL
- HD×
- LD×
Raywood ashFraxinus angustifolia 'Raywood' (F. oxycarpa)Tree- NCM
- CVM
- SCM
- SIM
- HDM
- LD×
red alderAlnus rubra (Alnus oregona)Tree, California native- NCH
- CVH
- SCH
- SIH
- HD×
- LD×
red and green kangaroo pawAnigozanthos manglesiiPerennial- NCL
- CV?
- SCM
- SIL
- HD×
- LD×
red argentine amaryllisRhodophiala bifidaBulb, Arboretum All-Star- NCL
- CVL
- SCL
- SIVL
- HD?
- LD?
red barberryBerberis haematocarpa (Mahonia haematocarpa)Shrub, California native- NC?
- CV?
- SCVL
- SIL
- HD?
- LD?
red birds in a treeScrophularia macranthaShrub- NC?
- CV?
- SC?
- SIL
- HD?
- LD?
red buckeyeAesculus paviaShrub, Tree- NCM
- CVM
- SCM
- SI?
- HD?
- LD?
red bunny tailsPennisetum massaicumOrnamental grass- NCL
- CV?
- SCM
- SIL
- HD?
- LD?
- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
red bush monkey flowerMimulus aurantiacus var. puniceusShrub, California native- NCVL
- CVL
- SCVL
- SIVL
- HD×
- LD×
Red Bush Monkeyflower, Mission DiplacusDiplacus puniceusShrub- NCL
- CVL
- SCVL
- SIL
- HD?
- LD?
red cap gumEucalyptus erythrocorysTree- NCL
- CVL
- SCL
- SIM
- HD×
- LDM
red centered hibiscusAlyogyne hakeifoliaShrub- NC×
- CV×
- SCL
- SIL
- HD×
- LD×
red cestrumCestrum elegansShrub- NCM
- CV×
- SCM
- SIM
- HD×
- LDM
red cestrumCestrum fasciculatum var. 'Newellii'Shrub- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
red cestrumCestrum purpureumShrub- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
red chokeberryAronia arbutifolia 'Brilliantissima'Shrub- NCM
- CVL
- SC?
- SI×
- HD?
- LD?
red clintoniaClintonia andrewsiana (shade)Bulb, California native- NCM
- CV?
- SC?
- SI×
- HD?
- LD?
red clusterberryCotoneaster coriaceus (Cotoneaster lacteus, Cotoneaster parneyi)Shrub- NCL
- CVM
- SCL
- SIM
- HDM
- LD?
red dragon fleece flowerPersicaria microcephala 'Red Dragon'Perennial- NC?
- CVM
- SC?
- SI?
- HD?
- LD?
Red Drift® roseRosa 'Meigalpio'Ground cover, Shrub- NCM
- CVM
- SC?
- SI?
- HD?
- LD?
red feathersEchium amoenumPerennial- NC?
- CV?
- SC?
- SIL
- HD?
- LD?
red flowering currantRibes sanguineum varieties, ssp. & cvs.Shrub, California native- NCL
- CVL
- SCL
- SIM
- HD?
- LD?
red flowering gumCorymbia ficifolia (Eucalyptus ficifolia)Tree- NCL
- CV×
- SCL
- SIM
- HD×
- LD×
red gingerAlpinia purpurataPerennial- NCH
- CVH
- SCH
- SIH
- HD×
- LD×
red gingerHedychium greeniiPerennial- NCM
- CV×
- SCH
- SIH
- HD×
- LD×
red ginger lilyHedychium coccinium (partial shade in South Inland)Perennial- NCM
- CV×
- SCH
- SIH
- HD×
- LD×
red gumEucalyptus camaldulensisTree- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
red horsechestnutAesculus x carneaTree- NCM
- CVM
- SCM
- SIM
- HD×
- LD×
Red Hot esperanzaTecoma x ‘Red Hot’- NC?
- CV?
- SCL
- SI?
- HD?
- LD?
red hot pokerKniphofia triangularisPerennial- NC?
- CV?
- SCM
- SIM
- HD?
- LD?
red hot pokerKniphofia uvaria hybrids and cvs.Perennial- NCL
- CVM
- SCL
- SIL
- HDM
- LDM
red huckleberryVaccinium parvifoliumShrub, California native- NCM
- CVM
- SC×
- SI×
- HD×
- LD×
red iron barkEucalyptus sideroxylonTree- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
red justiciaJusticia candicans (ovata)Shrub- NC?
- CV?
- SC?
- SI?
- HD?
- LDL
red kangaroo pawAnigozanthos rufusPerennial- NCL
- CV?
- SCM
- SIL
- HD×
- LD×
Red Lady Lenten roseHelleborus x hybridus 'Red Lady'Perennial- NCM
- CVM
- SC?
- SI?
- HD?
- LD?
red leafed mukdiniaMukdenia rossiiGround cover- NCM
- CV?
- SC?
- SIM
- HD?
- LD?
red leafed velvet senecioRoldana oaxacana (Senecio christobalensis)Shrub- NCM
- CV?
- SCM
- SIM
- HD?
- LD?
red lotus treeManglietia insignisTree- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
red mallowPavonia missionumShrub- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
red mapleAcer rubrumTree- NCM
- CVM
- SCH
- SIH
- HD×
- LD×
red New Zealand sedgeUncinia uncinataPerennial- NCM
- CV?
- SCM
- SIM
- HD?
- LD?
red oakQuercus rubraTree- NCM
- CVM
- SCM
- SIM
- HD×
- LD×
red orchid bushBauhinia galpiniiShrub, Tree- NCL
- CV×
- SCM
- SIM
- HD×
- LDM
red osier dogwoodCornus sericea sericea (Cornus stolonifera)Shrub, California native- NCH
- CVH
- SCH
- SIH
- HD×
- LD×
red ponytail palmBeaucarnea guatemalensis (Nolina guatemalensis)Shrub- NC?
- CV×
- SCM
- SIL
- HD?
- LD?
red push pistachePistacia x 'Red Push'Tree- NCL
- CVL
- SC?
- SIM
- HDM
- LDM
Red Rod Emu BushEremophila calorhabdosShrub- NCL
- CVL
- SC?
- SI?
- HD?
- LD?
red rootWachendorfia thyrsifloraPerennial- NCH
- CV?
- SCM
- SI?
- HD?
- LD?
red shanks/ribbonwoodAdenostoma sparsifoliumShrub, Tree, California native- NCVL
- CV?
- SCVL
- SIVL
- HD×
- LD×
red tubeflowerIochroma fuchsioidesShrub- NCM
- CV×
- SCM
- SIM
- HD?
- LD?
red tussock grassChionochloa rubraOrnamental grass- NCM
- CV?
- SC?
- SI?
- HD?
- LD?
- NCVL
- CVVL
- SCL
- SIL
- HDM
- LDM
red velvet sageSalvia confertifloraShrub- NCM
- CVM
- SCM
- SIM
- HD?
- LD?
red willowSalix laevigataTree, California native- NCH
- CVH
- SCH
- SIH
- HDH
- LD?
Red YuccaHesperaloe parviflora ssp. & cvs.Succulent- NCVL
- CVL
- SCVL
- SIL
- HDL
- LDL
red-barked dogwoodCornus albaTree- NCM
- CVM
- SC?
- SI?
- HD×
- LD×
red-flowered malleeEucalyptus erythronemaTree- NCL
- CV?
- SCL
- SI?
- HD?
- LD?
red-veined enkianthusEnkianthus campanulatusShrub- NCM
- CVH
- SC?
- SI?
- HD?
- LD×
red/ yellow yuccaHesperaloe parvifloraShrub, Succulent, Arboretum All-Star- NCL
- CVL
- SCVL
- SIL
- HDL
- LDL
redberryRhamnus croceaShrub, California native- NCL
- CVL
- SCVL
- SIL
- HD×
- LD?
Redbird Indian hawthornRhaphiolepis indica 'sPg-3-003' Redbird™Shrub- NC?
- CVL
- SCL
- SI?
- HD?
- LD?
Redhot Popsicle Dwarf PokerKniphofia 'Redhot Popsicle' PP24036Perennial- NCL
- CVM
- SCM
- SIM
- HDM
- LD?
redlake currantRibes rubrum 'RedLake'Shrub- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
redvein mapleAcer rufinerveTree- NCM
- CV?
- SC?
- SI?
- HD×
- LD×
redwingPterolobium stellatumShrub- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
redwood sorrelOxalis oregana (shade)Perennial, California native- NCM
- CVH
- SCH
- SI×
- HD?
- LD?
redwood violetViola sempervirensPerennial- NCL
- CV?
- SC×
- SIM
- HD?
- LD?
reed bambooOchlandra stridulaShrub, Bamboo- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
Reeves skimmiaSkimmia reevesianaShrub- NC?
- CV?
- SC×
- SI×
- HD×
- LD×
Refugio manzanitaArctostaphylos refugioensisShrub, California native- NCL
- CV?
- SCVL
- SIL
- HD×
- LD×
Regal prince oakQuercus x Regal PrinceTree- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
- NCM
- CVM
- SCM
- SI?
- HD?
- LD?
restio (similis)Restio similisPerennial- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
reticulata camelliaCamellia reticulataShrub- NCM
- CVM
- SCM
- SIM
- HD×
- LD×
rex begonia vineCissus javana (C. discolor)Vine- NC?
- CV?
- SC×
- SI?
- HD?
- LD?
rhodocoma (arida)Rhodocoma aridaPerennial- NCL
- CV?
- SCL
- SI?
- HD?
- LD?
rhodocoma (foliosa)Rhodocoma foliosaPerennial- NCM
- CV?
- SC?
- SI?
- HD?
- LD?
rhodocoma (fruticosa)Rhodocoma fruticosaPerennial- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
ribbon bushHomalocladium platycladumShrub- NCM
- CVM
- SCM
- SIL
- HD?
- LD?
- NCM
- CVM
- SCM
- SIM
- HD?
- LD?
rice flowerOzothamnus diosmifolius ssp. & cvs.Shrub- NCM
- CVL
- SCM
- SI?
- HD?
- LD?
rice flowerPimelea ferrugineaShrub- NCM
- CV×
- SCM
- SI×
- HD?
- LD?
rice flowerPimelea prostrataShrub- NCM
- CV×
- SC?
- SI×
- HD?
- LD?
rice paper plantTetrapanax papyriferaShrub- NCL
- CVM
- SCM
- SIL
- HD?
- LD?
Richmond begoniaBegonia ''Richmondensis''Perennial- NCM
- CVM
- SCM
- SIM
- HD?
- LD?
rigid woodmintStachys ajugoidesPerennial, California native- NC?
- CV?
- SCM
- SIM
- HD?
- LD?
- NC×
- CVL
- SC?
- SI?
- HD?
- LD?
ring bellflowerSymphyandra spp.Perennial- NCM
- CVM
- SCM
- SI?
- HD?
- LD?
- NC?
- CVL
- SCL
- SI?
- HD?
- LD?
river lilyHesperantha coccinea (Schizostylis)SHADEBulb- NCM
- CVM
- SCM
- SIM
- HD×
- LD?
river she-oakCasuarina cunninghamianaTree- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
river tea treeMelaleuca bracteata 'Revolution Green'Tree- NCL
- CV?
- SCL
- SI?
- HD?
- LD?
River WattleAcacia cognata 'ACCOG01' Cousin Itt™ PP25133Shrub- NCM
- CVL
- SCL
- SIL
- HD?
- LD×
river/red birchBetula nigraTree- NCH
- CVH
- SCH
- SIH
- HD×
- LD×
- NCL
- CVL
- SCL
- SIL
- HDM
- LD?
robin redbreast bushMelaleuca lateritiaShrub- NCL
- CV?
- SCL
- SI?
- HD×
- LD×
robust verbenaVerbena lasiostachysPerennial, California native- NCL
- CVL
- SC?
- SIL
- HD?
- LD?
rock cotoneasterCotoneaster horizontalisGround cover- NCL
- CVL
- SCL
- SIM
- HDM
- LD×
rock cressAubrieta deltoideaPerennial- NCL
- CVM
- SC?
- SI×
- HD?
- LD?
rock cressAubrieta x cultorumPerennial- NCM
- CVM
- SC?
- SI?
- HD?
- LD?
rock fernPellaea hastataPerennial- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
rock isotomaIsotoma axillarisGround cover- NCM
- CVM
- SC?
- SIM
- HD?
- LD?
rock jasmineAndrosace lanuginosaPerennial- NCM
- CV?
- SC?
- SI×
- HD?
- LD?
rock palmBrahea nitidaTree, Palm or cycad- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
rock peaAcmispon rigidus (Lotus rigidus)Perennial, California native- NCVL
- CV?
- SC?
- SIL
- HD?
- LD?
- NCL
- CVL
- SCM
- SIL
- HD?
- LD?
rock soapwortSaponaria ocymoidesGround cover, Perennial- NCL
- CVL
- SCM
- SIM
- HD×
- LD×
rock spireaHolodiscus discolor var. microphyllus (Holodiscus microphyllus)Shrub, California native- NCM
- CV?
- SC?
- SIM
- HD?
- LD?
rock spireaPetrophytum caespitosumPerennial, California native- NCL
- CV?
- SCL
- SIL
- HD?
- LD?
Rock VerbenaGlandularia pulchellaGround cover- NCL
- CV?
- SC×
- SI?
- HD?
- LDM
rock verbenaVerbena tenera (pulchella)Ground cover, Perennial- NCL
- CV?
- SCL
- SIM
- HDM
- LDM
- NCL
- CVM
- SCM
- SI×
- HD×
- LD×
rockroseCistus & spp. and cvs.Ground cover, Shrub- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
Rocky Mountain juniperJuniperus scopulorum spp. & cvs.Tree- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
- NC?
- CV?
- SC?
- SIM
- HDM
- LD?
Roger's Red grapeVitis 'Roger's Red'Vine, California native- NCL
- CVL
- SCL
- SIL
- HDM
- LD?
rogersia (aesculifolia)Rodgersia aesculifoliaPerennial- NCM
- CV?
- SC?
- SIH
- HD?
- LD?
rogersia (pinnata)Rodgersia pinnataPerennial- NCM
- CV?
- SC?
- SIH
- HD?
- LD?
rohdeaRohdea japonicaPerennial- NCL
- CVM
- SCM
- SIM
- HD?
- LD?
Rolling Hens and ChicksJovibarba ssp. & cvs.Succulent- NCL
- CV?
- SCL
- SI?
- HD?
- LD?
Roman Beauty RosemaryRosmarinus officinalis 'Roman Beauty' PP18192Shrub- NCL
- CVL
- SCL
- SIL
- HDL
- LDL
romeron pineRetrophyllum rospigliosiiTree- NCM
- CV?
- SC?
- SI?
- HD?
- LD?
rooiwortelBulbine latifoliaPerennial- NCL
- CV?
- SCL
- SIL
- HD?
- LD?
roscoeaRoscoea cautleyoidesPerennial- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
roscoeaRoscoea purpureaPerennial- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
roseRosa hybrids..bushShrub- NCM
- CVM
- SCM
- SIM
- HDM
- LDM
rose appleSyzygium jambosTree- NC×
- CV?
- SCM
- SI?
- HD?
- LD?
rose campion/crown pinkLychnis coronariaPerennial- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
rose cone flower/drumsticksIsopogon formosusShrub- NCL
- CV?
- SCL
- SI×
- HD?
- LD?
rose grassRhodohypoxis spp.Bulb- NCM
- CV?
- SCL
- SIM
- HD?
- LD?
rose of SharonHibiscus syriacusShrub- NCL
- CVM
- SCM
- SIM
- HD×
- LD×
rose sageSalvia pachyphyllaShrub, California native- NCL
- CVL
- SC×
- SIL
- HD?
- LD?
roseleaf sageSalvia involucrataPerennial, Shrub- NCM
- CVM
- SCM
- SIM
- HD?
- LD?
rosemaryRosmarinus cvs.Ground cover, Shrub- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
rosemaryRosmarinus officinalisShrub- NCL
- CVL
- SCVL
- SIL
- HDM
- LDM
Rosemary mintPoliomintha longifloraPerennial- NCL
- CVL
- SCL
- SIL
- HDL
- LDL
rosillaHelenium puberulumPerennial, California native- NCM
- CV?
- SCH
- SIM
- HD?
- LD?
Rosy Dawn manzanitaArctostaphylos edmundsii 'Rosy Dawn'Ground cover, Shrub, California native- NCL
- CVM
- SCL
- SI×
- HD×
- LD×
Rough HedgenettleStachys rigidaPerennial, California native- NCL
- CV?
- SCL
- SI?
- HD?
- LD?
rough-leaf dogwoodCornus drummondiiTree- NCM
- CV?
- SC?
- SI?
- HD×
- LD×
round leaf mint bushProstanthera rotundifoliaShrub- NCL
- CVM
- SCM
- SIM
- HD×
- LD×
round leaf snowberrySymphoricarpos rotundifolius (SHADE)Shrub, California native- NCL
- CVL
- SC×
- SIL
- HD?
- LD?
Rowall hypericumHypericum 'Rowallane'Shrub- NCM
- CVM
- SC?
- SI?
- HD×
- LD×
Roxburgh figFicus auriculataTree- NC×
- CV×
- SCM
- SIM
- HD×
- LD×
royal bluebellWahlenbergia gloriosaGround cover, Perennial- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
royal climberOxera pulchellaVine- NC?
- CV×
- SCM
- SIM
- HD×
- LD×
royal flush monopsisMonopsis unidentata 'Royal Flush'Ground cover- NC?
- CV?
- SC?
- SI?
- HD?
- LD?
- NCH
- CV?
- SCH
- SI?
- HD×
- LD×
royal poincianaDelonix regiaTree- NC×
- CV×
- SCM
- SI×
- HD×
- LDM
royal purple autumn sageSalvia muelleriPerennial, Shrub- NCL
- CVM
- SCL
- SI?
- HD?
- LD?
royal trumpet vineDistictis 'Rivers'Vine- NCM
- CVM
- SCM
- SIM
- HD×
- LDM
royal/flowering fernOsmunda regalisPerennial- NCH
- CVH
- SCH
- SI?
- HD×
- LD×
Rozanne geraniumGeranium 'Gerwat'Ground cover, Perennial- NCM
- CVM
- SC?
- SI?
- HD?
- LD?
rubber plantFicus elasticaShrub, Tree- NC×
- CV×
- SCM
- SIM
- HD×
- LD×
rubber vineCryptostegia grandifloraVine- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
ruby cinquefoilPotentilla atrosanguineaPerennial- NCM
- CV?
- SC?
- SI?
- HD?
- LD?
ruby cluster straw flowerHelichrysum amorginum ssp. & cvs.Perennial- NCL
- CVM
- SCL
- SIL
- HD×
- LD×
Ruby October Magic CamelliaCamellia sasanqua 'Green 02-003' October Magic® Ruby™Shrub- NC?
- CVM
- SC?
- SI?
- HD?
- LD?
ruby red spikemossSelaginella erythropus 'Sanguinea'Perennial- NC?
- CV?
- SCH
- SI?
- HD×
- LD×
rubygrassMelinis nerviglumis (Rhynchelytrum nerviglume)Ornamental grass- NCM
- CVM
- SCM
- SIM
- HD?
- LDM
rueRuta graveolensShrub- NCM
- CVM
- SCL
- SIM
- HD?
- LD?
rushJuncus aquatic spp. (native and non-native spp.)Perennial, California native- NCH
- CVH
- SCM
- SIM
- HD?
- LDM
rush leaved albucaAlbuca juncifoliaBulb- NC?
- CV?
- SCL
- SI?
- HD?
- LD?
Russell lupinesLupinus (Russell hybrids)Perennial- NCM
- CVM
- SC×
- SI×
- HD×
- LD×
Russian oliveElaeagnus angustifoliaShrub, Tree- NCVL
- CVL
- SCL
- SIL
- HDM
- LDM
Russian sagePerovskia spp. & cvs.Perennial, Shrub- NCL
- CVL
- SCL
- SIL
- HDL
- LDL
rusty foxgloveDigitalis ferrugineaPerennial- NCL
- CV?
- SCM
- SIM
- HD×
- LD×
rusty leaf figFicus rubiginosa (Ficus microphylla)Tree- NCM
- CV×
- SCM
- SIM
- HD?
- LD?
rusty sedgeCarex subfuscaPerennial, California native- NCL
- CV?
- SCM
- SI?
- HD?
- LD?
Photo credits, 171 images from Wikimedia Commons
- rabbit brush: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0 (licence)
- rabbit's foot fern: Forest & Kim Starr, CC BY 3.0 (licence)
- Radiant manzanita: Jan Eckstein, CC BY-SA 3.0 (licence)
- ragged leaf bahia: JerryFriedman, CC BY-SA 3.0 (licence)
- ragged rock flower: Katja Schulz from Washington, D. C., USA, CC BY 2.0 (licence)
- ragwort: Pieter Pelser, CC BY 3.0 (licence)
- Raleigh westringia: Aliiiciag, CC BY-SA 4.0 (licence)
- rama parda: Tania Pérez Fiol, CC BY 4.0 (licence)
- Rancho Tambor Agave: Krzysztof Ziarnek, Kenraiz, CC BY-SA 3.0 (licence)
- raspberry fuzzies: Douglas Goldman, CC BY-SA 4.0 (licence)
- Ray Hartman ceanothus: Cristian Bortes from Cluj-Napoca, Romania, CC BY 2.0 (licence)
- Raywood ash: Luis Fernández García, CC BY-SA 4.0 (licence)
- red alder: Walter Siegmund, CC BY 2.5 (licence)
- red and green kangaroo paw: Gnangarra, CC BY 2.5 au (licence)
- red argentine amaryllis: Gabriela F. Ruellan, CC BY 3.0 (licence)
- red barberry: Stickpen, Public domain
- red birds in a tree: peganum from Henfield, England, CC BY-SA 2.0 (licence)
- red buckeye: Eric Hunt, CC BY-SA 3.0 (licence)
- red bunny tails: Btcpg, CC BY-SA 4.0 (licence)
- red bush monkey flower: ALAN SCHMIERER, CC0 (licence)
- Red Bush Monkeyflower, Mission Diplacus: Lars Rosengreen, CC BY-SA 3.0 (licence)
- red cap gum: User:JarrahTree, CC BY 2.5 au (licence)
- red centered hibiscus: Jean and Fred, CC BY 2.0 (licence)
- red cestrum: 阿橋 HQ, CC BY-SA 2.0 (licence)
- red cestrum: Stan Shebs, CC BY-SA 3.0 (licence)
- red cestrum: Lazaregagnidze, CC BY-SA 3.0 (licence)
- red chokeberry: Kurt Stüber, CC BY-SA 3.0 (licence)
- red clintonia: Eric in SF, CC BY-SA 3.0 (licence)
- red clusterberry: Wouter Hagens, Public domain
- red dragon fleece flower: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- Red Drift® rose: Donar Reiskoffer, CC BY 3.0 (licence)
- red feathers: خودم(Ram!n TALK), Public domain
- red flowering currant: Walter Siegmund (talk), CC BY-SA 3.0 (licence)
- red flowering gum: Burkhard Mücke, CC BY-SA 4.0 (licence)
- red ginger: WoreczkoJan, CC BY 4.0 (licence)
- red ginger: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- red ginger lily: gailhampshire from Cradley, Malvern, U.K, CC BY 2.0 (licence)
- red gum: Javier martin, Public domain
- red horsechestnut: Rüdiger Wölk, CC BY-SA 2.5 (licence)
- Red Hot esperanza: Dhivya dhivi DJ, CC BY-SA 4.0 (licence)
- red hot poker: Dick Culbert from Gibsons, B.C., Canada, CC BY 2.0 (licence)
- red hot poker: yakovlev.alexey from Moscow, Russia, CC BY-SA 2.0 (licence)
- red huckleberry: Meggar at English Wikipedia, CC BY-SA 3.0 (licence)
- red iron bark: Bidgee, CC BY 3.0 (licence)
- red justicia: Stan Shebs, CC BY-SA 3.0 (licence)
- red kangaroo paw: Magnus Manske, CC BY-SA 3.0 (licence)
- Red Lady Lenten rose: Wildfeuer, CC BY 2.5 (licence)
- red leafed mukdinia: User:SB_Johnny, CC BY-SA 3.0 (licence)
- red leafed velvet senecio: Juan Carlos Fonseca Mata, CC BY-SA 4.0 (licence)
- red lotus tree: MichalPL, CC BY-SA 4.0 (licence)
- red mallow: scott.zona from Miami, Florida, USA, CC BY 2.0 (licence)
- red maple: Ayotte, Gilles, 1948-, CC BY-SA 4.0 (licence)
- red New Zealand sedge: Rudolph89, CC0 (licence)
- red oak: Nicholas A. Tonelli from Northeast Pennsylvania, USA, CC BY 2.0 (licence)
- red orchid bush: Tatiana Gerus from Brisbane, Australia, CC BY 2.0 (licence)
- red osier dogwood: R. A. Nonenmacher, CC BY-SA 4.0 (licence)
- red ponytail palm: Photo by David J. Stang, CC BY-SA 4.0 (licence)
- red push pistache: Hans Hillewaert, CC BY-SA 3.0 (licence)
- Red Rod Emu Bush: Geoff Derrin, CC BY-SA 4.0 (licence)
- red root: Abu Shawka, CC BY-SA 3.0 (licence)
- red shanks/ribbonwood: Noah Elhardt, CC BY-SA 2.5 (licence)
- red tubeflower: Stan Shebs, CC BY-SA 3.0 (licence)
- red tussock grass: JonKloske, CC BY-SA 3.0 (licence)
- red velvet sage: Ernie Wasson, CC BY 3.0 (licence)
- red willow: Anthony Valois and the National Park Service, Public domain
- Red Yucca: Photo by David J. Stang, CC BY-SA 4.0 (licence)
- red-barked dogwood: Opioła Jerzy (Poland), CC BY 2.5 (licence)
- red-flowered mallee: Casliber, CC BY-SA 3.0 (licence)
- red-veined enkianthus: KENPEI, CC BY-SA 3.0 (licence)
- red/ yellow yucca: Fritz Hochstätter, CC BY-SA 3.0 de (licence)
- redberry: Stan Shebs, CC BY-SA 3.0 (licence)
- Redbird Indian hawthorn: jacilluch, CC BY-SA 2.0 (licence)
- Redhot Popsicle Dwarf Poker: Mark Ahsmann, CC BY-SA 4.0 (licence)
- redlake currant: Apple2000, CC BY-SA 3.0 (licence)
- redvein maple: Liné1, CC BY-SA 3.0 (licence)
- redwing: Nevit Dilmen (talk), CC BY-SA 3.0 (licence)
- redwood sorrel: John Rusk from Berkeley, CA, United States of America, CC BY 2.0 (licence)
- redwood violet: Walter Siegmund (talk), CC BY-SA 3.0 (licence)
- reed bamboo: Sugeesh at Malayalam Wikipedia, CC BY-SA 3.0 (licence)
- Reeves skimmia: Kurt Stüber, CC BY-SA 3.0 (licence)
- Refugio manzanita: Miguel Vieira, CC BY 2.0 (licence)
- Regal prince oak: Yercaud-elango, CC BY-SA 4.0 (licence)
- restio (similis): Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- reticulata camellia: Eria Wei, CC BY-SA 4.0 (licence)
- rex begonia vine: Dinkum, CC0 (licence)
- rhodocoma (arida): George E. Koronaios, CC BY-SA 2.0 (licence)
- rhodocoma (foliosa): Daderot, CC0 (licence)
- rhodocoma (fruticosa): Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- ribbon bush: Peter Halasz, CC BY-SA 3.0 (licence)
- rice flower: Casliber, CC BY-SA 3.0 (licence)
- rice flower: C T Johansson, CC BY 3.0 (licence)
- rice flower: Andy king50, CC BY-SA 3.0 (licence)
- rice paper plant: KENPEI, CC BY-SA 3.0 (licence)
- Richmond begonia: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- rigid woodmint: Gordon Leppig & Andrea J. Pickart, Public domain
- ring bellflower: Kurt Stüber, CC BY-SA 3.0 (licence)
- river lily: JJ Harrison (https://www.jjharrison.com.au/), CC BY-SA 3.0 (licence)
- river she-oak: Ethel Aardvark, CC BY 3.0 (licence)
- river tea tree: Daderot, Public domain
- River Wattle: Daderot, CC0 (licence)
- river/red birch: Baummapper, CC BY-SA 3.0 de (licence)
- robin redbreast bush: Geoff Derrin, CC BY-SA 4.0 (licence)
- robust verbena: Stickpen, Public domain
- rock cotoneaster: Agnieszka Kwiecień, Nova, CC BY-SA 4.0 (licence)
- rock cress: Stan Shebs, CC BY-SA 3.0 (licence)
- rock cress: Sten Porse, CC BY-SA 3.0 (licence)
- rock fern: Nicolás Lavandero, CC BY 4.0 (licence)
- rock isotoma: Meneerke bloem, CC BY-SA 3.0 (licence)
- rock jasmine: David Short, CC BY 2.0 (licence)
- rock palm: Stan Shebs, CC BY-SA 3.0 (licence)
- rock pea: Unknown author, Public domain
- rock soapwort: Hans Hillewaert, CC BY-SA 3.0 (licence)
- rock spirea: Walter Siegmund (talk), CC BY-SA 3.0 (licence)
- rock spirea: Stan Shebs, CC BY-SA 3.0 (licence)
- Rock Verbena: Jeevan Jose, Kerala, India, CC BY-SA 4.0 (licence)
- rock verbena: Rillke, CC BY-SA 3.0 (licence)
- rockrose: Alvesgaspar, CC BY-SA 3.0 (licence)
- Rocky Mountain juniper: USDA-NRCS PLANTS Database / Herman, D.E. et al. 1996. North Dakota tree handb..., Public domain
- Roger's Red grape: Victor M. Vicente Selvas, Public domain
- rogersia (aesculifolia): A. Barra, CC BY 3.0 (licence)
- rogersia (pinnata): James Steakley, CC BY-SA 3.0 (licence)
- rohdea: Alpsdake, CC BY-SA 4.0 (licence)
- Rolling Hens and Chicks: User:Tigerente, CC BY 2.5 (licence)
- Roman Beauty Rosemary: Mohasaba, CC BY-SA 4.0 (licence)
- romeron pine: Daderot, CC0 (licence)
- rooiwortel: Paul Hermans, CC BY-SA 3.0 (licence)
- roscoea: Roscoea_purpurea_20070810-1338-183.jpg: Keith Edkins derivative work: Peter c..., CC BY 2.5 (licence)
- roscoea: Whf_purple_04_adjusted.jpg: *Whf_purple_04.jpg: Woudloper derivative work: Pe..., CC BY-SA 3.0 (licence)
- rose: User:Tigerente, CC BY-SA 3.0 (licence)
- rose apple: JonRichfield, CC BY-SA 3.0 (licence)
- rose campion/crown pink: Wouter Hagens, Public domain
- rose cone flower/drumsticks: Rick Horbury, CSIRO, CC BY 3.0 (licence)
- rose grass: Guérin Nicolas (messages), CC BY-SA 3.0 (licence)
- rose of Sharon: Wilhelm Zimmerling PAR, CC BY-SA 4.0 (licence)
- rose sage: Dick Culbert from Gibsons, B.C., Canada, CC BY 2.0 (licence)
- roseleaf sage: Kurt Stüber, CC BY-SA 3.0 (licence)
- rosemary: Donovan Govan., CC BY-SA 3.0 (licence)
- rosemary: Miomir Magdevski, CC BY-SA 4.0 (licence)
- Rosemary mint: Daderot, CC0 (licence)
- rosilla: Anthony Valois and the National Park Service, Public domain
- Rosy Dawn manzanita: John Rusk from Berkeley, CA, United States of America, CC BY 2.0 (licence)
- Rough Hedgenettle: Keir Morse, CC BY-SA 3.0 (licence)
- rough-leaf dogwood: photo by John Knouse, Public domain
- round leaf mint bush: Raffi Kojian, CC BY-SA 3.0 (licence)
- round leaf snowberry: Dcrjsr, CC BY 3.0 (licence)
- Rowall hypericum: Dominicus Johannes Bergsma., CC BY-SA 4.0 (licence)
- Roxburgh fig: കാക്കര, CC BY-SA 3.0 (licence)
- royal bluebell: NathanHurst at English Wikipedia, CC BY-SA 3.0 (licence)
- royal climber: Scott, CC BY 2.0 (licence)
- royal flush monopsis: Ragnhild&Neil Crawford from Sweden, CC BY-SA 2.0 (licence)
- royal poinciana: Averette, CC BY-SA 3.0 (licence)
- royal purple autumn sage: Stan Shebs, CC BY-SA 3.0 (licence)
- royal trumpet vine: Alex Popovkin, Bahia, Brazil from Brazil, CC BY 2.0 (licence)
- royal/flowering fern: Christian Fischer, CC BY-SA 3.0 (licence)
- Rozanne geranium: ShadowBee, CC BY-SA 4.0 (licence)
- rubber plant: VuThiAnh, CC0 (licence)
- rubber vine: Forest & Kim Starr, CC BY 3.0 (licence)
- ruby cinquefoil: Vinayaraj, CC BY-SA 4.0 (licence)
- ruby cluster straw flower: peganum from Small Dole, England, CC BY-SA 2.0 (licence)
- Ruby October Magic Camellia: Chihiro H, CC BY 3.0 (licence)
- ruby red spikemoss: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- rubygrass: JMK, CC BY-SA 3.0 (licence)
- rue: Kurt Stüber, CC BY-SA 3.0 (licence)
- rush: Christian Fischer, CC BY-SA 3.0 (licence)
- rush leaved albuca: SAplants, CC BY-SA 4.0 (licence)
- Russell lupines: Jean-Claude Echardour [CC BY-SA], via Tela Botanica, CC BY 2.0 (licence)
- Russian olive: Photo by Dave Powell, USDA, Forest Service, Public domain
- Russian sage: Stan Shebs, CC BY-SA 3.0 (licence)
- rusty foxglove: Zeynel Cebeci, CC BY-SA 4.0 (licence)
- rusty leaf fig: Agnieszka Kwiecień, Nova, CC BY-SA 4.0 (licence)
- rusty sedge: Forest & Kim Starr, CC BY 3.0 (licence)
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Zones: NC North-Central Coastal, CV Central Valley, SC South Coastal, SI South Inland, HD High and Intermediate Desert, LD Low Desert. Ratings: VL very low water, L low, M moderate, H high, ? not rated for that zone, × not suited to that zone. Ratings are the University of California WUCOLS IV list.
How to use this list
- MinutesOpen the calculator with this plant set. The preset city is in a zone where WUCOLS rates the plant. Set your sprinkler type and watering days.
- GuideRead a plant watering guide. Links appear for plants covered by our 1023 written guides.
- PlanBuild your personal watering plan. Put your plants and city together for monthly sprinkler minutes on a printable sheet.
Sources
- WUCOLS IV plant list, University of California, snapshot of the live databaseRead August 23, 2026 on ucanr.edu/sites/WUCOLS
- Appendix C reference evapotranspiration table behind the six zonesRead August 23, 2026 on water.ca.gov/-/media/DWR-Website/Web-Pages/Programs/Water-Use-And-Efficiency/MWELO-Rulemaking/Final-MWELO-Text-and-Appendices_20250103.pdf