How often to water white mulberry in California

In July, established white mulberry in loam needs a deep watering about every 20 days in the Central Valley, about every 11 days on the south coast and about every 9 days in the South Inland zone. Sandy soil holds less water, so waterings come closer together. Clay stretches them. Check the soil before each watering and skip one after a soaking rain.

In July in the Central Valley, established white mulberry needs about 2.7 gallons a day under a 10 foot canopy and about 11 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.

Yes. WUCOLS rates white mulberry separately for each of the six California climate zones: moderate water in the North-Central Coastal zone, low water in the Central Valley zone, moderate water in the South Coastal zone, moderate water in the South Inland zone, moderate water in the High and Intermediate Desert zone, moderate water in the Low Desert zone. The monthly table above shows how the same rating translates into different gallon amounts as reference evapotranspiration changes.

WUCOLS rates it low water there, lower than its moderate rating across the rest of the state. Established trees tolerate heat and drought well. Young valley trees still need regular water while their roots develop.

It has a shallow root system, so give it generous distance from paving and pipes when choosing a planting spot. Roots already established close to structures are difficult to redirect by changing watering alone.

Fruit drop from a bearing female tree is a normal part of its cycle, not usually a sign of thirst. Some leaf shedding in extreme heat can follow dry soil, so check moisture if the drop looks heavier than fruit alone. The two problems have different causes.

Both share the same root habit and water needs, since fruitlessness is simply a male selection with no female flowers. Choose a fruitless cultivar to avoid staining from dropped fruit, not for different irrigation. Water either type the same way for its zone.

Yes, it tolerates a wide range of soils and is known for weedy, vigorous growth in disturbed ground. Good drainage still helps established roots avoid standing water after a storm. Compacted soil may simply mean watering less often but more deeply.

It has naturalized and spreads by seed in parts of the country, so check local guidance before planting a fruiting female. Fruitless, seedless cultivars avoid this spread entirely. Volunteer seedlings nearby do not need separate irrigation attention.