ice plant (Aptenia)Aptenia cordifoliaGround cover, Perennial- NCL
- CVL
- SCL
- SIL
- HD×
- LD×
Plants starting with I: 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.
ice plant (Aptenia)Aptenia cordifoliaGround cover, Perennial
ice plant (Carpobrotus)Carpobrotus spp.Ground cover- NCL
- CVM
- SC×
- SIL
- HDL
- LDL
ice plant (Cephalophyllum)Cephalophyllum spp.Ground cover- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
ice plant (Delosperma)Delosperma spp. & cvs.Ground cover- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
ice plant (Drosanthemum)Drosanthemum spp. & cvs.Ground cover- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
ice plant (Lampranthus)Lampranthus spp.Ground cover- NCL
- CVL
- SCVL
- SIL
- HD×
- LD×
ice plant (Maleophora)Malephora spp. & cvs.Ground cover- NCL
- CVL
- SCVL
- SIL
- HDL
- LDM
ice plant (Red Apple)Aptenia 'Red Apple'Ground cover, Perennial- NCL
- CVL
- SCL
- SIL
- HD×
- LD×
Iceberg roseRosa 'Korbin'Shrub- NCM
- CVM
- SC?
- SI?
- HD?
- LD?
Icecap™ roseRosa 'Meiradena' - Icecap™ roseShrub- NCM
- CVL
- SCL
- SI?
- HD?
- LD?
Idaho Blue-Eyed GrassSisyrinchium idahoenseOrnamental grass- NCL
- CVM
- SC?
- SI?
- HD?
- LD?
Idaho fescueFestuca idahoensis and cvs.Ornamental grass, California native- NCVL
- CVL
- SCL
- SIM
- HD?
- LD?
Idyllwild rock flowerHeuchera hirsutissimaPerennial, California native- NCM
- CVM
- SCM
- SIL
- HD?
- LD?
ifafa lilyCyrtanthus mackenii ssp. cooperiBulb- NCM
- CV?
- SCL
- SI?
- HD?
- LD?
Immigrant Forage KochiaBassia prostrata 'Immigrant'Shrub- NCVL
- CV?
- SC?
- SI?
- HDL
- LD?
improved banana shrubMagnolia x foggii (? Michelia unresolved)Shrub- NCM
- CV?
- SCM
- SIM
- HD?
- LD?
in the mountains micheliaMagnolia maudiaeTree- NCM
- CV?
- SCM
- SI?
- HD?
- LD?
- NCM
- CVM
- SCM
- SIM
- HDM
- LD×
Indian banyanFicus benghalensisTree- NC×
- CV×
- SCM
- SI?
- HD?
- LD?
Indian hawthorneRhaphiolepis indica ssp. & cvs.Shrub- NCL
- CVM
- SCL
- SIM
- HDM
- LDM
Indian hempApocynum cannabinumPerennial, California native- NCM
- CVM
- SC?
- SIL
- HD?
- LD?
Indian holly fernArachniodes simplicior (SHADE)Perennial- NC?
- CV?
- SCM
- SI?
- HD?
- LD?
Indian laurel fig/ laurel figFicus microcarpa (Ficus retusa nitida)Tree- NCM
- CV×
- SCM
- SIM
- HD×
- LDM
Indian mallowAbutilon palmeriShrub, California native- NCL
- CVL
- SCL
- SIL
- HDM
- LDM
Indian mock strawberryDuchesnea indicaGround cover- NCM
- CVM
- SCM
- SIM
- HD×
- LD×
- NCVL
- CV?
- SCVL
- SI?
- HDL
- LD?
Indian RicegrassAchnatherum hymenoidesOrnamental grass- NCL
- CVL
- SCL
- SI?
- HD?
- LD?
- NCL
- CV?
- SCL
- SIL
- HDM
- LDM
Indigo Frost™ Lily of the NileAgapanthus AMBIC001' ('Twister') PP25519Perennial- NCM
- CVM
- SCM
- SIM
- HDM
- LD×
indigo woodland sageSalvia forskaohleiPerennial- NCM
- CVM
- SCM
- SIM
- HD?
- LD?
indigo/pea bushDalea pulchraShrub- NC×
- CV×
- SCM
- SI×
- HDL
- LDL
inkberryIlex glabraShrub- NCM
- CV?
- SC?
- SI?
- HD?
- LD?
inside-out flowerVancouveria spp. (shade)Ground cover, Perennial, California native- NCM
- CV×
- SC×
- SIL
- HD?
- LD?
interior golden bushEricameria linearifoliaShrub, California native- NCL
- CV?
- SCVL
- SIL
- HD?
- LD?
interior live oakQuercus wislizeniTree, California native- NCVL
- CVVL
- SCVL
- SIVL
- HDM
- LD×
inulaInula ensifoliaPerennial- NCM
- CV?
- SCM
- SI×
- HD?
- LD?
inyouchikuzokuHibanobambusa tranquillansPerennial- NCH
- CV?
- SCM
- SI?
- HD?
- LD?
Irish heathDaboecia cantabricaShrub- NCM
- CV?
- SC×
- SI×
- HD×
- LD×
Irish mossSagina subulata (Arenaria)Ground cover, Perennial- NCM
- CVM
- SCM
- SIH
- HD×
- LD×
Irish yewTaxus baccata 'Fastigiata'Shrub, Tree- NCM
- CVM
- SCM
- SIM
- HDM
- LD×
ironwoodLyonothamnus spp. & cvs.Tree, California native- NCL
- CVL
- SCL
- SIL
- HD×
- LD×
island alum rootHeuchera maximaPerennial, California native, Arboretum All-Star- NCL
- CVL
- SCL
- SIM
- HD?
- LD?
island bristleweedHazardia detonsaShrub, California native- NCL
- CVL
- SCVL
- SIL
- HD?
- LD?
island bush poppyDendromecon harfordiiShrub, California native- NCL
- CVVL
- SCVL
- SIL
- HD?
- LD?
island bush snapdragonGambelia speciosa ssp. & cvs. (Galvezia speciosa & cvs.)Shrub, California native- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
island cape myrtlePhylica arboreaShrub- NCL
- CV?
- SCM
- SI?
- HD?
- LD?
island ceanothusCeanothus arboreus & ssp. & cvs.Shrub, California native- NCL
- CVL
- SCL
- SIM
- HD×
- LD×
island manzanitaArctostaphylos insularisShrub, California native- NCL
- CV?
- SCVL
- SIL
- HD×
- LD×
island mountain mahoganyCercocarpus betuloides var. blancheaeShrub, California native, Arboretum All-Star- NCL
- CVL
- SC?
- SIVL
- HD?
- LD?
island oakQuercus tomentellaTree, California native- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
Island Rush RoseCrocanthemum (Helianthemum) greeneiPerennial, California native- NCL
- CV?
- SCVL
- SI?
- HD?
- LD?
Island Sage BrushArtemisia nesioticaPerennial, California native- NCL
- CVL
- SCVL
- SIL
- HDL
- LD×
island snowflakeConstancea nevinii (Eriophyllum nevinii)Shrub, California native- NCL
- CV?
- SCVL
- SI×
- HD?
- LD?
Island TarweedHemizonia clementinaPerennial, California native- NCL
- CV?
- SC?
- SI?
- HD?
- LD?
island wallflowerErysimum insularePerennial, California native- NCL
- CVL
- SCVL
- SI?
- HD?
- LD?
- NCL
- CV?
- SCM
- SI×
- HD?
- LD?
Italian alderAlnus cordataTree- NCM
- CVM
- SCM
- SIM
- HD×
- LD×
Italian arumArum italicumPerennial- NCVL
- CVVL
- SCVL
- SIVL
- HD?
- LD?
Italian buckthornRhamnus alaternusShrub- NCL
- CVL
- SCL
- SIM
- HD×
- LD×
Italian clematisClematis viticellaVine- NCL
- CVM
- SC?
- SIM
- HD?
- LD?
Italian cypressCupressus sempervirens ssp. & cvs.Tree- NCL
- CVL
- SCL
- SIL
- HDL
- LDM
Italian jasmineJasminum humileShrub- NCL
- CVM
- SCM
- SIM
- HD×
- LDM
Italian Jerusalem sagePhlomis italicaShrub- NCL
- CVL
- SCL
- SIL
- HD?
- LD?
Italian stone pinePinus pineaTree- NCVL
- CVL
- SCL
- SIL
- HDM
- LDM
Ithuriel's spearTriteleia laxaBulb, California native- NCVL
- CVVL
- SCVL
- SIVL
- HD?
- LD?
ivory silk lilacSyringa reticulata 'Ivory Silk'Shrub- NCM
- CVM
- SC×
- SI?
- HD?
- LD×
ivy geraniumPelargonium peltatumGround cover, Perennial- NCL
- CVM
- SCM
- SIM
- HD×
- LD×
ivy leaf cyclamenCyclamen hederifoliumBulb, Arboretum All-Star- NCVL
- CVL
- SCL
- SIL
- HD?
- LD?
Photo credits, 64 images from Wikimedia Commons
- ice plant (Aptenia): KENPEI, CC BY-SA 3.0 (licence)
- ice plant (Carpobrotus): Debivort at en.wikipedia, CC BY-SA 3.0 (licence)
- ice plant (Cephalophyllum): Winfried Bruenken (Amrum), CC BY-SA 2.5 (licence)
- ice plant (Delosperma): Didier Descouens, CC BY-SA 4.0 (licence)
- ice plant (Drosanthemum): LBM1948, CC BY-SA 4.0 (licence)
- ice plant (Lampranthus): Bilby, CC BY 3.0 (licence)
- ice plant (Maleophora): Miwasatoshi, CC BY-SA 4.0 (licence)
- ice plant (Red Apple): Forest & Kim Starr, CC BY 3.0 (licence)
- Iceberg rose: Hedwig Storch, CC BY-SA 3.0 (licence)
- Icecap™ rose: R.P. Braun, CC BY-SA 4.0 (licence)
- Idaho Blue-Eyed Grass: Walter Siegmund (talk), CC BY-SA 3.0 (licence)
- Idaho fescue: Chris Wagner, Public domain
- Idyllwild rock flower: GT1976, CC BY-SA 4.0 (licence)
- ifafa lily: Karen Wiebe, CC BY-SA 3.0 (licence)
- Immigrant Forage Kochia: Stefan.lefnaer, CC BY-SA 3.0 (licence)
- improved banana shrub: Danneckc, CC BY-SA 4.0 (licence)
- in the mountains michelia: K. Kendall from Portland, OR, USA, CC BY 2.0 (licence)
- Indian banyan: Ahoerstemeier, CC BY-SA 3.0 (licence)
- Indian hawthorne: SAplants, CC BY-SA 4.0 (licence)
- Indian hemp: SB Johnny, CC BY-SA 3.0 (licence)
- Indian holly fern: Forest & Kim Starr, CC BY 3.0 (licence)
- Indian laurel fig/ laurel fig: H. Zell, CC BY-SA 3.0 (licence)
- Indian mallow: This photography was created by Mariluna. Other photos see here., CC BY-SA 3.0 (licence)
- Indian mock strawberry: Ixitixel, CC BY-SA 3.0 (licence)
- Indian Ricegrass: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0 (licence)
- Indigo Frost™ Lily of the Nile: Nesnad, CC BY 4.0 (licence)
- indigo woodland sage: Acabashi, CC BY-SA 4.0 (licence)
- indigo/pea bush: Stan Shebs, CC BY-SA 3.0 (licence)
- inkberry: James H. Miller & Ted Bodner, Southern Weed Science Society, Bugwood.org, CC BY 3.0 (licence)
- inside-out flower: Miguel Vieira, CC BY 2.0 (licence)
- interior golden bush: Eric in SF, CC BY-SA 3.0 (licence)
- interior live oak: Benny White, CC BY-SA 3.0 (licence)
- inula: Jerzy Opioła, CC BY-SA 4.0 (licence)
- inyouchikuzoku: Daderot, Public domain
- Irish heath: -Merce- from Madrid, España, CC BY-SA 2.0 (licence)
- Irish moss: Jerzy Opioła, CC BY-SA 4.0 (licence)
- Irish yew: Athantor, CC BY-SA 4.0 (licence)
- ironwood: Stickpen, Public domain
- island alum root: Stan Shebs, CC BY-SA 3.0 (licence)
- island bristleweed: Stickpen, Public domain
- island bush poppy: Stan Shebs, CC BY-SA 3.0 (licence)
- island bush snapdragon: Melburnian, CC BY 2.5 (licence)
- island cape myrtle: Marco Schmidt, CC BY-SA 3.0 (licence)
- island ceanothus: Burkhard Mücke, CC BY-SA 4.0 (licence)
- island manzanita: Stickpen, Public domain
- island mountain mahogany: Krzysztof Ziarnek, Kenraiz, CC BY-SA 4.0 (licence)
- island oak: Photographed and uploaded by :en:Geographer (talk | contribs), CC BY 2.5 (licence)
- Island Rush Rose: Unknown author, Public domain
- Island Sage Brush: Daderot, Public domain
- island snowflake: Stickpen, Public domain
- Island Tarweed: Stan Shebs, CC BY-SA 3.0 (licence)
- island wallflower: Anthony Valois and the National Park Service, Public domain
- Italian alder: Franz Xaver, CC BY-SA 3.0 (licence)
- Italian arum: Consultaplantas, CC BY-SA 4.0 (licence)
- Italian buckthorn: Hectonichus, CC BY-SA 3.0 (licence)
- Italian clematis: Epibase, CC BY 2.5 (licence)
- Italian cypress: Taoujouti Abdelmouhaïmen, CC BY-SA 4.0 (licence)
- Italian jasmine: Shu Suehiro, CC BY-SA 3.0 (licence)
- Italian Jerusalem sage: Raulsintes, CC BY-SA 3.0 (licence)
- Italian stone pine: Dubas from Oviedo, España, CC BY-SA 2.0 (licence)
- Ithuriel's spear: First Light (talk), CC BY 3.0 (licence)
- ivory silk lilac: Herman, D. E., et al. (1996). North Dakota tree handbook., Public domain
- ivy geranium: Hedwig Storch, CC BY-SA 3.0 (licence)
- ivy leaf cyclamen: PLAKLE, CC BY-SA 4.0 (licence)
_Delosperma_cooperi_-_Flower.jpg){kind=link}
-2552.jpg){kind=link}
_Heuchera_(alumroot)_at_Bichlh%C3%A4usl_in_Frankenfels,_Austria.jpg){kind=link}
.jpg){kind=link}
.jpg){kind=link}
.jpg){kind=link}
_-_DSC02344.JPG){kind=link}
,_%CE%8C%CF%81%CE%BF%CF%82_%CE%A0%CE%AC%CE%B9%CE%BA%CE%BF.jpg){kind=link}
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