How often to water Madagascar sago in California
In July on the south coast, established Madagascar sago in loam needs a deep watering about every 11 days: about 8.8 gallons each time under a 4 foot canopy, about 5.6 gallons a week. Madagascar sago is a large cycad from open coastal forests of Madagascar and eastern Africa. In California it slowly builds a short trunk and reaches about 4 to 8 feet, with a flush of up to 40 glossy leaves 5 feet or more long. New leaves emerge bluish and darken to deep green. In California gardens it wants a shaded or partly sunny spot and moist, well-drained soil.
How often to water Madagascar sago, 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
- Leaflets on Madagascar sago dulling or drooping while the soil is dry a few inches down mean it needs water
- Leaf scorch after a night near 25 degrees F points to cold damage, and a new flush usually follows
- Yellowing leaves on soil that stays soggy point to poor drainage
- Leaves bleaching in hot, full sun point to too much light
How to water it
- Water deeply around the trunk when the top couple of inches of soil dry
- Plant in shade or part sun in moist, well-drained soil
- Keep the soil evenly moist through the warm months
- Protect it from long or hard frosts
- Keep pets away from the seeds and leaves
Through the seasons
Water a new plant regularly while it roots in. Established plants want moderate, even moisture through the warm months, when new leaf flushes appear. It is evergreen and takes only a very light frost, though it can grow out of minor scorch from brief dips near 25 degrees F. Winter rain usually covers its needs on the south coast. WUCOLS rates Madagascar sago moderate 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
Madagascar sago grows well in a large container in a shaded courtyard. Use a well-drained mix that holds some moisture. Water when the top couple of inches dry, until it drains through. In summer, check every few days. Empty the saucer. In winter, water less and move the pot to shelter when temperatures drop toward 25 degrees F, since longer cold harms it.
- A year
- no figure
- Reference
- Sacramento climate table
- Counts
- Plant need, before sprinkler losses
WUCOLS lists Madagascar Sago as not evaluated for the Central Valley zone, so no monthly figure is computed here.
Monthly water need by climate zone
Madagascar Sago: gallons per square foot per month, by WUCOLS climate zone
| Month | N. Coast | C. Valley | S. Coast | S. Inland | Hi Desert | Lo Desert |
|---|---|---|---|---|---|---|
| Jan | – | – | 0.78 | – | – | – |
| Feb | – | – | 0.81 | – | – | – |
| Mar | – | – | 1.15 | – | – | – |
| Apr | – | – | 1.4 | – | – | – |
| May | – | – | 1.61 | – | – | – |
| Jun | – | – | 1.74 | – | – | – |
| Jul | – | – | 1.98 | – | – | – |
| Aug | – | – | 1.86 | – | – | – |
| Sep | – | – | 1.49 | – | – | – |
| Oct | – | – | 1.15 | – | – | – |
| Nov | – | – | 0.84 | – | – | – |
| Dec | – | – | 0.65 | – | – | – |
| Year | – | – | 15.5 | – | – | – |
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 Madagascar sago. Plants that drink alike can share one valve and one schedule.
Everglades PalmAcoelorraphe wrightiinot rated, Central Valleyno Central Valley rating
Formosa Sugar PalmArenga englerinot rated, Central Valleyno Central Valley rating
Bismarck PalmBismarckia nobilisnot rated, Central Valleyno Central Valley rating
Chilean Feather BambooChusquea culeou (C. breviglumis)not rated, Central Valleyno Central Valley rating
BlackbrushColeogyne ramosissimanot rated, Central Valleyno Central Valley rating
Glaucous Scorpion VetchCoronilla valentina glaucanot rated, Central Valleyno Central Valley rating
Willowleaf CotoneasterCotoneaster salicifoliusnot rated, Central Valleyno Central Valley rating
Irish HeathDaboecia cantabricanot rated, Central Valleyno Central Valley rating
Butterfly PalmDypsis lutescens (Areca)not rated, Central Valleyno Central Valley rating
Umbrella BambooFargesia murielaenot rated, Central Valleyno Central Valley rating
Blue Fountain BambooFargesia nitida (Sinarundinaria nitida) (BAMBOO)not rated, Central Valleyno Central Valley rating
Prickly HeathGaultheria mucronata (Pernettya mucronata)not rated, Central Valleyno Central Valley rating
OtterbossieGossypium harknessiinot rated, Central Valleyno Central Valley rating
Box-leaved HollyIlex crenatanot rated, Central Valleyno Central Valley rating
Bellyache BushJatropha gossypiifolianot rated, Central Valleyno Central Valley rating
Mountain LaurelKalmia latifolianot rated, Central Valleyno Central Valley ratingTurn this into minutes on your water days
Every city page has a calculator that takes Madagascar sago, 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 Madagascar sago need per day?
In July on the south coast, established Madagascar sago needs about 0.8 gallons a day under a 4 foot canopy and about 3.2 gallons a day under a 8 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 Madagascar sago change across California?
Yes. WUCOLS rates Madagascar sago separately for each of the six California climate zones: not evaluated in the North-Central Coastal zone, not evaluated in the Central Valley zone, moderate 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.
Does Madagascar sago need shade?
In California it does best in shade or part sun. It grows well in full sun only in tropical climates. A bright, shaded spot works well.
How big does Madagascar sago get?
In the tropics it can reach 10 to 30 feet. In California expect 4 to 8 feet with a short trunk. The leaves alone can be 5 feet long.
How cold can Madagascar sago take?
It is fully hardy only to a very light frost. Brief dips to about 25 degrees F scorch the leaves, but new leaves follow. Protect it from long or hard cold.
Is Madagascar sago poisonous?
It is flagged as possibly poisonous. Keep pets and children away from it. Pick up any seeds.
Is Madagascar sago fast growing?
It is fast for a cycad, though slower in California than in the tropics. It grows in flushes of many leaves at once. Each flush can bring dozens of leaves.
More plant watering guides
Sources
- WUCOLS IV plant water use classification for Cycas thouarsii (SHADE), 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