How often to water Chilean feather bamboo in California
In July on the north-central coast, established Chilean feather bamboo in loam needs a deep watering about every 13 days: about 8.8 gallons each time for a plant 4 feet across, about 4.6 gallons a week. Chilean feather bamboo is a large evergreen clumping bamboo from the Andes of Chile and Argentina. Its solid, olive-green canes carry dense sprays of short branches and small, narrow leaves. It grows best in rich soil that stays moist but drains well, and a young clump needs steady water while its roots build up.
How often to water Chilean feather bamboo, 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 the plant covers, and skip a watering after a good soaking rain.
How to tell it needs water
- Soil dry 3 to 4 inches down at the edge of the clump, under the fallen leaves, means it is time for a deep soak
- A young clump wilting in summer heat over dry soil needs a deeper soak, since it is still building its roots
- Few or thin new canes after a dry year can follow held-back water, since bamboo growth slows when water is limited
- Soil that stays soggy for days around the clump is too wet for this bamboo, which wants moist but well-drained ground
- Weak, spindly canes in a crowded clump call for thinning in spring rather than more water
How to water it
- Water the whole clump and a band of soil around it with drip or a slow hose, since bamboo roots are shallow but spread wide
- Soak until the soil is moist about a foot down, then let the top few inches dry before the next soak
- Leave fallen bamboo leaves under the clump as mulch, and add compost to keep the soil rich
- Plant in moist but well-drained soil, sheltered from cold, drying winds
- Widen the watered ring as the clump expands outward from its center
Through the seasons
Bamboo takes several years to settle in, so give a new clump regular water through its first few summers. Once established it handles periods of drought, though it grows best in soil that stays moist. It stays evergreen all year. Watering matters most from spring through summer, the main growing season. It is one of the hardier clumping bamboos. Winter rain covers the cool months on the north-central coast and the south coast. WUCOLS rates it moderate water on the north-central coast and on the south coast. WUCOLS has not evaluated it for the Central Valley, South Inland, the high desert or the low desert.
In pots
Chilean feather bamboo can grow well over 10 feet tall, so a container only suits a young plant or a short stay. Use a large, sturdy pot with drainage holes and a rich mix. A potted clump can dry out quickly, so check the mix 2 inches down every few days in summer, and daily in hot, windy weather. Water until it drains from the holes, then empty the saucer. In winter, coastal rain may wet the pot, but check the mix during dry spells.
- A year
- no figure
- Reference
- Sacramento climate table
- Counts
- Plant need, before sprinkler losses
WUCOLS lists Chilean Feather Bamboo as not evaluated for the Central Valley zone, so no monthly figure is computed here.
Monthly water need by climate zone
Chilean Feather Bamboo: gallons per square foot per month, by WUCOLS climate zone
| Month | N. Coast | C. Valley | S. Coast | S. Inland | Hi Desert | Lo Desert |
|---|---|---|---|---|---|---|
| Jan | 0.37 | – | 0.78 | – | – | – |
| Feb | 0.53 | – | 0.81 | – | – | – |
| Mar | 0.87 | – | 1.15 | – | – | – |
| Apr | 1.18 | – | 1.4 | – | – | – |
| May | 1.46 | – | 1.61 | – | – | – |
| Jun | 1.61 | – | 1.74 | – | – | – |
| Jul | 1.61 | – | 1.98 | – | – | – |
| Aug | 1.49 | – | 1.86 | – | – | – |
| Sep | 1.24 | – | 1.49 | – | – | – |
| Oct | 0.87 | – | 1.15 | – | – | – |
| Nov | 0.47 | – | 0.84 | – | – | – |
| Dec | 0.31 | – | 0.65 | – | – | – |
| Year | 12 | – | 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 Chilean feather bamboo. Plants that drink alike can share one valve and one schedule.
Formosa Sugar PalmArenga englerinot 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
Madagascar SagoCycas thouarsii (SHADE)not 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 rating
Barbados CherryMalpighia glabranot rated, Central Valleyno Central Valley rating
Siberian CypressMicrobiota decussatanot rated, Central Valleyno Central Valley ratingTurn this into minutes on your water days
Every city page has a calculator that takes Chilean feather bamboo, 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 Chilean feather bamboo need per day?
In July on the north-central coast, established Chilean feather bamboo needs about 0.7 gallons a day for a plant 4 feet across and about 2.6 gallons a day for a plant 8 feet across. Give it in deep waterings spread days apart rather than a little every day, so the whole root zone gets wet.
Does watering for Chilean feather bamboo change across California?
Yes. WUCOLS rates Chilean feather bamboo separately for each of the six California climate zones: moderate water 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.
Will Chilean feather bamboo spread through my yard?
It forms broad, dense clumps rather than running far underground. Clumping bamboos expand outward in a circle and do not invade the surrounding garden. Still, give the clump room to widen over the years.
Are Chilean feather bamboo canes hollow?
No. The canes are solid, and each node bears branches that fork into dense sprays of small, narrow leaves. That dense branching gives the plant its feathery look.
Should I cut off bamboo flowers?
Yes. Cut out flowering shoots promptly to discourage more from forming. Remove weak, dead or spindly canes in spring as well.
How cold can Chilean feather bamboo take?
It comes from the Andes and is hardier than most clumping bamboos. That makes it a candidate for colder foothill gardens where other clumpers struggle. Shelter it from cold, drying winds.
Why is my new bamboo growing so slowly?
Bamboo spends its first few years building roots underground before the fast top growth starts. Keep watering and feeding it regularly during that time. Holding back water slows its growth further.
How tall does Chilean feather bamboo get?
Canes commonly reach 8 to 11 feet, and mature clumps can grow taller. A clump usually spreads 5 to 8 feet wide over time.
More plant watering guides
Sources
- WUCOLS IV plant water use classification for Chusquea culeou (C. breviglumis), 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