WateringTimesWatering plan, $19
Ilex aquifolium, WUCOLS IV

How often to water English holly in California

In July in the Central Valley, established English holly in loam needs a deep watering about every 8 days: about 8.8 gallons each time for a plant 4 feet across, about 7.6 gallons a week. English holly is a dense, evergreen shrub or tree with glossy, spiny-edged leaves and red berries on female plants. It tolerates average garden watering once established and prefers soil that drains well rather than staying soggy. Part shade helps it through hot inland summers, since full sun in intense heat can stress the foliage.

ShrubRated for 6 of 6 zones

How often to water English holly, month by month

Your city
Plant width
4 ft
Your soil

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.

Every month, on your water days. The personal plan prints this for English holly and the rest of your yard, on the days your water supplier allows.Get the plan for $19

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.

Which soil do you have?

Dig down a few inches, take a handful of moist soil and squeeze it.

  • Sandy: gritty, falls apart when you open your hand, will not form a ball.
  • Loam: forms a soft ball that crumbles when you poke it.
  • Clay: forms a firm, sticky ball and squeezes out into a ribbon between thumb and finger.

Still not sure? Pick loam. Most garden beds sit between sand and clay.

How to measure plant width

A shrub with its width marked from one side to the other and the circle under it shaded blue

Measure across the plant, from the tips of the leaves on one side to the tips on the other.

Water the whole area the plant covers, shown in blue. The gallons here cover that area.

A wider plant means more gallons each watering, not more waterings. While it is young, measure again each spring.

How to tell it needs water

  • Soil dry 3 to 4 inches down beneath an established English holly signals it needs a deep soak
  • Dull-looking holly foliage in hot weather calls for checking both soil moisture and exposure
  • Missing berries on a female holly call for checking pollination before changing watering
  • Soil that remains sodden beneath the evergreen canopy suggests overwatering or poor drainage
  • Blackened leaf margins warrant inspecting the plant, including whether the root zone remains too wet

How to water it

  • Water English holly deeply at the drip line rather than close against the trunk
  • Soak the root zone a foot deep, then let the top few inches dry before watering again
  • Use drip or a slow soak instead of frequent overhead sprinkling that wets the leaves
  • Choose well-drained ground for English holly and assess a raised bed if water collects at the planting site
  • Extend the watered area outward as the shrub's canopy and root spread widen

Through the seasons

In its first year, check moisture around an English holly root ball while roots establish. This evergreen shrub holds its leaves year round and settles into average garden watering once established. It draws most heavily on soil moisture during spring growth and summer heat. The spring flowers can develop into red fruit on female plants when pollinated. Winter rain usually covers the cool months on the coast. WUCOLS rates English holly low water on the north-central coast. It rates moderate water in the Central Valley, on the south coast, in South Inland and in the high desert and the low desert.

In pots

For an English holly kept in a container, choose a roomy pot and allow for its eventual tree-sized growth. Check the top couple of inches of mix often during California summer heat and water when it feels dry. Soak until excess drains through the holes, then empty the saucer so roots do not sit wet. Give a container plant some afternoon shade in hot inland locations to ease moisture loss. In winter, water less often as growth slows, keeping the mix from drying out completely.

1 Your climate zone six WUCOLS zones, each from its own reference city
2.67gal per sq ft in JulyModerate water use in the Central Valley zone
A year
17.11 gal per sq ft
Reference
Sacramento climate table
Counts
Plant need, before sprinkler losses
0.761.52.33.00.4JAN0.65FEB1.09MAR1.52APR2.08MAY2.48JUN2.67JUL2.39AUG1.8SEP1.18OCT0.56NOV0.34DEC0.761.52.33.00.4JFM1.52AMJ2.67JAS1.18OND
Gallons per square foot per month, Central Valley. Peak 2.67 in Jul, 17.11 a year.

Monthly water need by climate zone

English Holly: gallons per square foot per month, by WUCOLS climate zone

MonthN. CoastC. ValleyS. CoastS. InlandHi DesertLo Desert
Jan0.150.40.780.780.740.78
Feb0.210.650.810.870.930.93
Mar0.351.091.151.31.461.52
Apr0.471.521.41.611.891.95
May0.582.081.611.952.392.45
Jun0.642.481.742.292.852.79
Jul0.642.671.982.513.042.85
Aug0.62.391.862.332.792.6
Sep0.51.81.491.862.142.08
Oct0.351.181.151.331.461.49
Nov0.190.560.840.90.930.96
Dec0.120.340.650.680.650.68
Year4.817.1115.518.4121.2721.08

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 moderate water in the Central Valley, like English holly. Plants that drink alike can share one valve and one schedule.

RosesRosa hybrids..bushmoderate water, Central Valley2.67 gal/sq ft in JulyAzaleasRhododendron spp. (CA native and non-native spp.)moderate water, Central Valley2.67 gal/sq ft in JulyCamelliasCamellia japonica (SHADE IN DESERT)moderate water, Central Valley2.67 gal/sq ft in JulyGardeniasGardenia spp. & cvs.moderate water, Central Valley2.67 gal/sq ft in JulyBird of ParadiseStrelitzia reginae (shade in desert)moderate water, Central Valley2.67 gal/sq ft in JulyHibiscusHibiscus rosa-sinensismoderate water, Central Valley2.67 gal/sq ft in JulySago PalmCycas revolutamoderate water, Central Valley2.67 gal/sq ft in JulyStar JasmineTrachelospermum jasminoides and cvs.moderate water, Central Valley2.67 gal/sq ft in JulyArborvitaeThuja occidentalis ssp. & cvs.moderate water, Central Valley2.67 gal/sq ft in JulyBambooBambusa spp.moderate water, Central Valley2.67 gal/sq ft in JulyLilacsSyringa hybrids (including Descanso hybrids)moderate water, Central Valley2.67 gal/sq ft in JulySpireaSpiraea spp. (CA native and non native spp.)moderate water, Central Valley2.67 gal/sq ft in JulyButterfly BushBuddleja davidii and hybridsmoderate water, Central Valley2.67 gal/sq ft in JulySageSalvia officinalis and cvs.moderate water, Central Valley2.67 gal/sq ft in JulyRed BuckeyeAesculus paviamoderate water, Central Valley2.67 gal/sq ft in JulyWestern ServiceberryAmelanchier alnifoliamoderate water, Central Valley2.67 gal/sq ft in July

Similar plants that need less water 16

Rated lower than English holly in the Central Valley. Worth a look for a new bed or a lawn replacement.

LavenderLavandula spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyRosemaryRosmarinus officinalislow water, Central Valley1.07 gal/sq ft in JulyBougainvilleaBougainvillea & spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyOlive TreesOlea europaea ssp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyCrape MyrtleLagerstroemia spp., hybrids & cvs.low water, Central Valley1.07 gal/sq ft in JulyLantanaLantana camara ssp. & cvs.low water, Central Valley1.07 gal/sq ft in JulySalviaSalvia greggii ssp., cvs. & hybridslow water, Central Valley1.07 gal/sq ft in JulyAloeAloe spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulySucculentsEcheveria spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyJunipersJuniperus spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyRussian SagePerovskia spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulySagebrushArtemisia spp. (shrubby)low water, Central Valley1.07 gal/sq ft in JulyWild PrivetLigustrum vulgarelow water, Central Valley1.07 gal/sq ft in JulyCoralberrySymphoricarpos orbiculatus (SHADE)low water, Central Valley1.07 gal/sq ft in JulySydney Golden WattleAcacia longifolialow water, Central Valley1.07 gal/sq ft in JulyBlue Leaf WattleAcacia salignalow water, Central Valley1.07 gal/sq ft in July
Minutes for your sprinklers

Turn this into minutes on your water days

Every city page has a calculator that takes English holly, 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 often should I water English holly in summer?

In July, established English holly in loam needs a deep watering about every 8 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.

How much water does English holly need per day?

In July in the Central Valley, established English holly needs about 1.1 gallons a day for a plant 4 feet across and about 4.3 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 English holly change across California?

Yes. WUCOLS rates English holly separately for each of the six California climate zones: low water in the North-Central Coastal zone, moderate 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.

Does English holly need a male and female plant to get berries?

Yes, English holly has separate male and female plants, and a female needs a male pollinizer to set fruit. Flowers alone do not guarantee berries, so check the plants present before assuming a fruitless holly needs more water.

Can English holly handle full sun in a hot inland yard?

It prefers some afternoon shade in intense inland heat, since full sun there can stress the glossy leaves. Along the milder coast it typically handles more direct sun. Check both sun exposure and root-zone moisture if foliage deteriorates.

Is English holly considered invasive in California gardens?

In parts of the coastal western United States it has spread from gardens into wild areas by seed carried by birds. Removing spent berries or choosing a seedless cultivar can reduce that spread. Check local guidance before planting it near natural areas.

Why are my English holly leaves turning yellow and dropping?

Yellowing and leaf loss alone do not establish a cause. Check for persistent wetness around the roots, since English holly dislikes poor drainage and can develop several diseases in overly wet conditions. Correct a confirmed drainage problem before adding more irrigation.

Does English holly tolerate clay soil?

English holly can grow in clay when the site drains well. Assess a raised planting area if water persists in the bed. Its intolerance of poor drainage makes a moisture check more useful than judging by texture alone.

More plant watering guides

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Sources