How often to water yellow bell bauhinia in California
In July on the south coast, established yellow bell bauhinia in loam needs a deep watering about every 11 days: about 8.8 gallons each time for a plant 4 feet across, about 5.6 gallons a week. Yellow bell bauhinia is a shrub from southern and tropical Africa with arching, semi-pendulous branches and light green leaves split into two lobes. From late spring well into fall, it bears bright yellow, bell-like flowers about an inch long, with a maroon blotch in the center in summer. It wants full sun, regular to occasional water and a nearly frost-free garden.
How often to water yellow bell bauhinia, 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
- Leaves on yellow bell bauhinia drooping while the soil is dry a few inches down mean it needs water
- Few flowers in shade point to too little sun
- Leaves damaged after a night near 30 degrees F point to cold, not thirst
- Yellowing leaves on soil that stays wet point to overwatering
How to water it
- Water deeply at the base when the top few inches of soil dry
- Plant in full sun in a nearly frost-free spot
- Give regular to occasional water through the long bloom season
- Mulch the root zone to hold moisture
- Protect it on cold nights below about 30 degrees F
Through the seasons
Water a new shrub regularly through its first summer. Established plants want regular to occasional water while they bloom from late spring into fall. In winter, rain and cooler weather cut its needs. Frost below about 30 degrees F can damage it. WUCOLS rates yellow bell bauhinia moderate water on the south coast. WUCOLS marks it as not suited to the north-central coast, the Central Valley or the low desert. WUCOLS has not evaluated it for South Inland or the high desert.
In pots
Yellow bell bauhinia makes a fine large potted plant on a sunny patio. Use a well-drained mix in a roomy container. Water when the top couple of inches dry, until it drains through. In summer, check every couple of days. Empty the saucer. In winter, water less and move the pot under cover when frost threatens, since it is hardy only to about 30 degrees F.
- A year
- no figure
- Reference
- Sacramento climate table
- Counts
- Plant need, before sprinkler losses
WUCOLS lists Yellow Bell Bauhinia as not suited to this region for the Central Valley zone, so no monthly figure is computed here.
Monthly water need by climate zone
Yellow Bell Bauhinia: 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 suited to this region in the Central Valley, like yellow bell bauhinia. Plants that drink alike can share one valve and one schedule.
Chenille PlantAcalypha hispidanot rated, Central Valleyno Central Valley rating
CopperleafAcalypha wilkesiananot rated, Central Valleyno Central Valley rating
Magic FlowerCantua buxifolianot rated, Central Valleyno Central Valley rating
Clustered Fishtail PalmCaryota mitisnot rated, Central Valleyno Central Valley rating
Hawaiian TiCordyline fruticosa (Cordyline terminalis)not rated, Central Valleyno Central Valley rating
FilbertCorylus maximanot rated, Central Valleyno Central Valley rating
PoinsettiaEuphorbia pulcherrimanot rated, Central Valleyno Central Valley rating
Weeping Chinese BanyanFicus benjaminanot rated, Central Valleyno Central Valley rating
Rubber PlantFicus elasticanot rated, Central Valleyno Central Valley rating
Franklin TreeFranklinia alatamaha (Gordonia alatamaha)not rated, Central Valleyno Central Valley rating
Jungle GeraniumIxora coccineanot rated, Central Valleyno Central Valley rating
Orange JessamineMurraya paniculatanot rated, Central Valleyno Central Valley rating
Common GuavaPsidium guajavanot rated, Central Valleyno Central Valley rating
Organ Pipe CactusStenocereus thurberi (Lemaireocereus thurberi)not rated, Central Valleyno Central Valley rating
Giant Bird of ParadiseStrelitzia nicolai (shade in desert)not rated, Central Valleyno Central Valley rating
Marmalade BushStreptosolen jamesoniinot rated, Central Valleyno Central Valley ratingTurn this into minutes on your water days
Every city page has a calculator that takes yellow bell bauhinia, 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 yellow bell bauhinia need per day?
In July on the south coast, established yellow bell bauhinia needs about 0.8 gallons a day for a plant 4 feet across and about 3.2 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 yellow bell bauhinia change across California?
Yes. WUCOLS rates yellow bell bauhinia separately for each of the six California climate zones: not suited to this region in the North-Central Coastal zone, not suited to this region 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 suited to this region in the Low Desert zone. The monthly table above shows how the same rating translates into different gallon amounts as reference evapotranspiration changes.
Why are bauhinia leaves split in two?
Each leaf is made of two matching lobes. The genus name honors the twin Bauhin brothers, which fits the twin lobes. It is an easy way to know the plant.
How big does yellow bell bauhinia get?
In gardens it grows about 4 to 9 feet tall and as wide. In the wild it can reach 12 feet. Older plants in Santa Barbara have rarely passed 5 feet.
When does yellow bell bauhinia bloom?
Flowers appear from late spring or early summer well into fall. They are bright yellow and about an inch long. A maroon blotch marks the center in summer.
How cold can yellow bell bauhinia take?
Frost near 30 degrees F is about its limit. Use it in nearly frost-free gardens. Grow it in a pot where winters are colder.
Where is yellow bell bauhinia from?
It grows wild from South Africa north into tropical Africa and India. It is a member of the pea family. The species name refers to its velvety seed pods.
More plant watering guides
Sources
- WUCOLS IV plant water use classification for Bauhinia tomentosa, 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