WateringTimesWatering plan, $19
Malus hybrids, WUCOLS IV

How often to water crabapple in California

In July in the Central Valley, established crabapple in loam needs a deep watering about every 8 days: about 55 gallons each time under a 10 foot canopy, about 47 gallons a week. Crabapples are flowering apple trees grown for clouds of pink, white or red spring blossoms and small fruits in fall. Most are hybrids, from dwarf and columnar forms to rounded trees 15 to 40 feet tall. They want full sun and moist but well-drained soil, and they perform best in cool climates, since humid summers raise disease pressure.

TreeRated for 4 of 6 zones

How often to water crabapple, month by month

Your city
Canopy width
10 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 crabapple 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 under the branches, 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 canopy width

A tree with its canopy width marked across the widest branches and the circle under it shaded blue

Measure across the branches, from the tips of the outer leaves on one side to the tips on the other. A tape works, or pace it out.

Water the whole circle under the branches, shown in blue. The gallons here cover that circle.

A wider canopy means more gallons each watering, not more waterings. While the tree is young, measure again each spring.

How to tell it needs water

  • Soil dry 4 inches down at the edge of the canopy means crabapple needs a deep soak
  • Leaves curling or dropping early in a hot, dry summer can point to a dry root zone
  • Blossoms and shoot tips that turn brown and hang on like scorched leaves point to fire blight
  • Olive green to black spots on the leaves point to apple scab, a disease rather than a water problem
  • Yellowing leaves in soil that stays soggy suggest the roots are short of air

How to water it

  • Water crabapple at the root zone under the canopy with drip or a soaker, keeping blossoms and leaves dry
  • Soak about 18 inches deep, then let the top few inches dry before the next watering
  • Skip irrigation during bloom, since water droplets help spread fire blight
  • Plant in full sun in humus-rich, well-drained, slightly acidic soil
  • Mulch the root area and widen the watered ring as the crown grows

Through the seasons

Water a new crabapple steadily through its first summers while roots spread. Established trees tolerate some drought but still need deep soakings in long, dry summers. Flowers open in spring, fruit colors in fall, and leaves drop for winter. Hold irrigation during bloom, when splashing water can spread fire blight. In the Central Valley, South Inland, the high desert and on the north-central coast, crabapple is rated moderate water. WUCOLS lists the south coast and the low desert as not suited.

In pots

Dwarf and columnar crabapples can grow in large containers. Use a pot with drainage holes and a rich, well-drained mix. In summer heat, check the mix 2 inches down every few days and water when dry. Pour at the base rather than over the blossoms or leaves. Empty the saucer. In winter the bare tree needs only light watering to keep the root ball from drying 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

Crabapple: gallons per square foot per month, by WUCOLS climate zone

MonthN. CoastC. ValleyS. CoastS. InlandHi DesertLo Desert
Jan0.370.4–0.780.74–
Feb0.530.65–0.870.93–
Mar0.871.09–1.31.46–
Apr1.181.52–1.611.89–
May1.462.08–1.952.39–
Jun1.612.48–2.292.85–
Jul1.612.67–2.513.04–
Aug1.492.39–2.332.79–
Sep1.241.8–1.862.14–
Oct0.871.18–1.331.46–
Nov0.470.56–0.90.93–
Dec0.310.34–0.680.65–
Year1217.11–18.4121.27–

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 crabapple. Plants that drink alike can share one valve and one schedule.

Citrus TreesCitrus spp.moderate water, Central Valley2.67 gal/sq ft in JulyJapanese MapleAcer palmatummoderate water, Central Valley2.67 gal/sq ft in JulyAvocado TreesPersea americanamoderate water, Central Valley2.67 gal/sq ft in JulyMagnolia TreesMagnolia grandiflora ssp. & cvs.moderate water, Central Valley2.67 gal/sq ft in JulyPalm TreesSyagrus romanzoffiana (Arecastrum romanzoffianum)moderate water, Central Valley2.67 gal/sq ft in JulyApple TreesMalus spp. (edible) e.g, 'Anna' (low chill variety for low desert)moderate water, Central Valley2.67 gal/sq ft in JulyPeach TreesPrunus spp. ediblemoderate water, Central Valley2.67 gal/sq ft in JulyPersimmon TreesDiospyros kakimoderate water, Central Valley2.67 gal/sq ft in JulyAmur MapleAcer ginnalamoderate water, Central Valley2.67 gal/sq ft in JulyFernleaf MapleAcer japonicummoderate water, Central Valley2.67 gal/sq ft in JulyBox ElderAcer negundomoderate water, Central Valley2.67 gal/sq ft in JulyNorway MapleAcer platanoidesmoderate water, Central Valley2.67 gal/sq ft in JulyRed MapleAcer rubrummoderate water, Central Valley2.67 gal/sq ft in JulyChinese MapleAcer truncatummoderate water, Central Valley2.67 gal/sq ft in JulyRed BuckeyeAesculus paviamoderate water, Central Valley2.67 gal/sq ft in JulyRed HorsechestnutAesculus x carneamoderate water, Central Valley2.67 gal/sq ft in July

Similar plants that need less water 16

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

Olive TreesOlea europaea ssp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyFig TreesFicus carica 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 JulyAloeAloe spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyPomegranate TreesPunica granatumlow water, Central Valley1.07 gal/sq ft in JulyEucalyptusEucalyptus polyanthemoslow water, Central Valley1.07 gal/sq ft in JulyPine TreesPinus canariensislow water, Central Valley1.07 gal/sq ft in JulyJunipersJuniperus spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyTexas Red OakQuercus buckleyilow water, Central Valley1.07 gal/sq ft in JulyPortuguese OakQuercus faginealow water, Central Valley1.07 gal/sq ft in JulySoapbark TreeQuillaja saponarialow water, Central Valley1.07 gal/sq ft in JulyNecklace TreeSophora affinislow water, Central Valley1.07 gal/sq ft in JulyBailey AcaciaAcacia baileyanalow water, Central Valley1.07 gal/sq ft in JulySilver WattleAcacia dealbatalow water, Central Valley1.07 gal/sq ft in JulyGreen WattleAcacia decurrenslow water, Central Valley1.07 gal/sq ft in JulySydney Golden WattleAcacia longifolialow 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 crabapple, 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 crabapple in summer?

In July, established crabapple in loam needs a deep watering about every 8 days in the Central Valley 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 crabapple need per day?

In July in the Central Valley, established crabapple needs about 6.8 gallons a day under a 10 foot canopy and about 27 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.

Does watering for crabapple change across California?

Yes. WUCOLS rates crabapple separately for each of the six California climate zones: moderate water in the North-Central Coastal zone, moderate water in the Central Valley zone, not suited to this region in the South Coastal zone, moderate water in the South Inland zone, moderate water 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 my crabapple blossoms turning brown?

Blossoms that wilt, brown and cling to the branch point to fire blight, which often damages crabapples. Prune out infected wood in summer or winter, and avoid watering during bloom.

Should I fertilize my crabapple?

Go light. Excess nitrogen pushes fast, soft shoots that fire blight attacks most severely. Steady deep watering matters more than heavy feeding.

What diseases affect crabapple?

Fire blight, rust, apple scab and powdery mildew are common, along with aphids, mites and borers. Keeping the leaves dry when you water reduces some leaf diseases.

Does crabapple need full sun?

Yes, it thrives in full sun. Sunny sites dry out faster, so check soil moisture through summer.

Can you overwater crabapple?

Yes. It wants moist but well-drained soil. Ground that stays soggy harms the roots, so let the top few inches dry between soakings.

More plant watering guides

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Sources