How often to water butterfly palm in California
In July on the south coast, established butterfly palm in loam needs a deep watering about every 7 days: about 55 gallons each time under a 10 foot canopy, about 56 gallons a week. Butterfly palm, also sold as areca palm, is a clumping palm from Madagascar with many slender, ringed stems like bamboo and arching, feathery fronds. Yellow-green stems and leaf stalks give it a warm glow. It wants moist but well-drained soil, warmth and partial shade, and it sulks when allowed to dry out.
How often to water butterfly palm, month by month
Type your city above and the days between waterings and the gallons appear here, worked out from your city's climate table. Or read the figures by climate zone further down.
How this is worked out: established roots fill the top 1.5 feet of soil, and you water again when that soil has dried halfway. Loam soil holds about 1.5 inches of water per foot. Water the whole area under the branches, and skip a watering after a good soaking rain.
How to tell it needs water
- Soil dry an inch or two down beside the clump in summer signals butterfly palm needs water
- Frond tips browning and leaflets folding can indicate the root zone has dried
- Pale, yellowing fronds in hot afternoon sun point to too much light rather than thirst
- Soft stem bases and yellow lower fronds over soggy soil suggest overwatering
- Fine webbing or sticky leaves point to spider mites, whiteflies or scale
How to water it
- Water around the whole clump with drip or a slow hose so all stems get moisture
- Soak about a foot down, then water again as the top inch begins to dry
- Plant in partial shade in rich, well-drained soil out of drying wind
- Mulch the root zone to hold moisture, keeping mulch off the stems
- Add emitters as new stems join the clump
Through the seasons
Keep a new butterfly palm evenly moist through its first year. Established clumps still want steady moisture from spring through fall. It is evergreen and grows slowly in cool weather, so it needs less in winter. It is a tropical palm, so frost is a real risk, and cold, wet soil in winter adds to it. WUCOLS rates butterfly palm high water on the south coast. WUCOLS has not evaluated it for the north-central coast, the Central Valley, South Inland, the high desert or the low desert.
In pots
Butterfly palm is one of the most popular container palms, indoors and on shaded patios. Keep the mix moist but not soggy in the growing season, watering when the top inch dries. Water until it drains through and empty the saucer. Indoors, give it bright, indirect light and extra humidity. Repot every 2 or 3 years. In winter, water less and keep it away from cold drafts and frost.
- A year
- no figure
- Reference
- Sacramento climate table
- Counts
- Plant need, before sprinkler losses
WUCOLS lists Butterfly Palm as not evaluated for the Central Valley zone, so no monthly figure is computed here.
Monthly water need by climate zone
Butterfly Palm: gallons per square foot per month, by WUCOLS climate zone
| Month | N. Coast | C. Valley | S. Coast | S. Inland | Hi Desert | Lo Desert |
|---|---|---|---|---|---|---|
| Jan | – | – | 1.24 | – | – | – |
| Feb | – | – | 1.29 | – | – | – |
| Mar | – | – | 1.84 | – | – | – |
| Apr | – | – | 2.23 | – | – | – |
| May | – | – | 2.58 | – | – | – |
| Jun | – | – | 2.78 | – | – | – |
| Jul | – | – | 3.17 | – | – | – |
| Aug | – | – | 2.98 | – | – | – |
| Sep | – | – | 2.38 | – | – | – |
| Oct | – | – | 1.84 | – | – | – |
| Nov | – | – | 1.34 | – | – | – |
| Dec | – | – | 1.04 | – | – | – |
| Year | – | – | 24.8 | – | – | – |
How this is worked out: the WUCOLS water rating for each zone times that zone’s climate for the month. A dash means WUCOLS does not rate the plant there. The figures are what the plant uses, before sprinkler losses.
Plants with the same water needs 16
Rated not evaluated in the Central Valley, like butterfly palm. Plants that drink alike can share one valve and one schedule.
Hawthorn MapleAcer crataegifoliumnot rated, Central Valleyno Central Valley rating
Mountain MapleAcer glabrumnot rated, Central Valleyno Central Valley rating
Miyabe MapleAcer miyabeinot rated, Central Valleyno Central Valley rating
Everglades PalmAcoelorraphe wrightiinot rated, Central Valleyno Central Valley rating
Pink CedarAcrocarpus fraxinifoliusnot rated, Central Valleyno Central Valley rating
YellowwoodAfrocarpus falcatus (Podocarpus falcatus)not rated, Central Valleyno Central Valley rating
New Caledonian PineAraucaria columnaris (A. cookii)not rated, Central Valleyno Central Valley rating
Formosa Sugar PalmArenga englerinot rated, Central Valleyno Central Valley rating
NeemAzadirachta indicanot rated, Central Valleyno Central Valley rating
Bismarck PalmBismarckia nobilisnot rated, Central Valleyno Central Valley rating
American HornbeamCarpinus caroliniananot rated, Central Valleyno Central Valley rating
Japanese HornbeamCarpinus japonicanot rated, Central Valleyno Central Valley rating
Chilean Feather BambooChusquea culeou (C. breviglumis)not rated, Central Valleyno Central Valley rating
American YellowwoodCladrastis kentukeanot rated, Central Valleyno Central Valley rating
BlackbrushColeogyne ramosissimanot rated, Central Valleyno Central Valley rating
Pagoda DogwoodCornus alternifolianot rated, Central Valleyno Central Valley ratingTurn this into minutes on your water days
Every city page has a calculator that takes butterfly palm, your sprinkler type and the month, and gives the minutes per water day for that supplier's schedule. Or put it in a zone of the personal watering plan and get all twelve months printed.
Questions people ask
How much water does butterfly palm need per day?
In July on the south coast, established butterfly palm needs about 8.0 gallons a day under a 10 foot canopy and about 32 gallons a day under a 20 foot canopy. Give it in deep waterings spread days apart rather than a little every day, so the whole root zone gets wet.
Does watering for butterfly palm change across California?
Yes. WUCOLS rates butterfly palm separately for each of the six California climate zones: not evaluated in the North-Central Coastal zone, not evaluated in the Central Valley zone, high water in the South Coastal zone, not evaluated in the South Inland zone, not evaluated in the High and Intermediate Desert zone, not evaluated in the Low Desert zone. The monthly table above shows how the same rating translates into different gallon amounts as reference evapotranspiration changes.
Can butterfly palm grow outdoors in California?
It grows outdoors in the warmest, frost-free spots, mainly along the south coast. Give it partial shade and steady water. Elsewhere, grow it in a pot you can move inside.
Why are my areca palm tips turning brown?
Dry soil, dry air and drying wind are common causes. Keep the soil evenly moist and raise humidity indoors. Trim brown tips with clean scissors.
Is butterfly palm safe for pets?
It is listed as non-toxic for cats and dogs. The growing heart of the palm is toxic to people and should not be eaten. Keep it as an ornamental.
Does butterfly palm flower?
Outdoors it can produce yellow flower clusters in summer, followed by yellow-orange fruit. Indoors it rarely blooms. Flowering does not change its watering.
What pests attack butterfly palm?
Scale, whiteflies and spider mites are the main pests. Check leaf undersides, especially indoors. Mites favor dry air, so humidity helps.
More plant watering guides
Sources
- WUCOLS IV plant water use classification for Dypsis lutescens (Areca), the University of California survey California agencies use for landscape plan reviewRead August 23, 2026 on wucols.ucdavis.edu
- Model Water Efficient Landscape Ordinance, adopted text and appendices, effective 2025-01-02 · monthly reference evapotranspiration per city, Appendix CRead 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
- UC Statewide IPM Program, irrigation scheduling using evapotranspirationRead September 30, 2026 on ipm.ucanr.edu/PMG/GARDEN/ENVIRON/evap.html
- Shaw and Pittenger, Landscape Irrigation System Evaluation and Management, UC Cooperative Extension, 2009Read September 30, 2026 on ucanr.edu/sites/default/files/2013-02/160836.pdf
- Pittenger, Water Management in Gardens and Landscapes, UC Riverside, 2017Read September 30, 2026 on ucanr.edu/sites/default/files/2017-03/258022.pdf