WateringTimesWatering plan, $19
Lonicera japonica, WUCOLS IV

How often to water honeysuckle in California

In July in the Central Valley, established honeysuckle in loam needs a deep watering about every 8 days: about 2.2 gallons each time for a plant 2 feet across, about 1.9 gallons a week. Japanese honeysuckle is a fast twining vine with fragrant white flowers that age to yellow. It can root where stems touch damp ground and is invasive in California. For an existing vine, check moisture around its main roots without using its spreading habit as proof of overwatering.

Ground coverVineRated for 6 of 6 zones

How often to water honeysuckle, month by month

Your city
Plant width
2 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 honeysuckle 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 4 to 6 inches down near the main stems signals that an established honeysuckle needs a deep soak
  • Leaves still dull and limp at dawn can indicate thirst when the root zone is dry
  • Shriveled unopened buds and dull leaves can accompany dryness, while open flowers fading from white to yellow is normal
  • Yellow lower leaves over wet soil can indicate drainage trouble, but check the foliage for aphids or mildew too

How to water it

  • Water around the main honeysuckle roots beneath the tangled growth, moistening soil about 12 to 18 inches deep
  • Use drip or a slow hose beneath the dense canopy so water reaches the soil
  • Keep bark mulch clear of the crown and remove runners that root into it
  • Spread emitters across an existing groundcover bed so moisture reaches beyond the original root ball
  • Check drainage around the crown in heavy clay and reduce irrigation when winter soil remains wet

Through the seasons

Keep a new honeysuckle root ball moist through its first summer, extending the watered area as roots spread. Established vines still need soil checks during growth and flowering from late spring through summer, sometimes into fall. Japanese honeysuckle retains leaves in mild winters and rests with leaf loss in colder weather. Winter rain can supply coastal and Central Valley plants; check both deserts through dry winter gaps. WUCOLS rates it moderate water on the north-central coast, in the Central Valley, in the high desert and in the low desert. It rates low water on the south coast and in South Inland.

In pots

A trellised honeysuckle carries a large leafy top above the limited mix in a container. Check the top couple of inches often in California summer heat and water when they dry. Soak until excess leaves the drainage holes, then empty the saucer. Shade the pot during hot inland afternoons and keep growth within its allotted space. In winter, slower growth leaves mix wet longer, so wait for it to dry deeper and shelter a slow-draining pot from persistent rain.

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

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

MonthN. CoastC. ValleyS. CoastS. InlandHi DesertLo Desert
Jan0.370.40.310.310.740.78
Feb0.530.650.320.350.930.93
Mar0.871.090.460.521.461.52
Apr1.181.520.560.641.891.95
May1.462.080.640.782.392.45
Jun1.612.480.690.922.852.79
Jul1.612.670.7913.042.85
Aug1.492.390.740.932.792.6
Sep1.241.80.60.742.142.08
Oct0.871.180.460.531.461.49
Nov0.470.560.330.360.930.96
Dec0.310.340.260.270.650.68
Year1217.116.27.3721.2721.08

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

JasmineJasminum polyanthummoderate water, Central Valley2.67 gal/sq ft in JulyStar JasmineTrachelospermum jasminoides and cvs.moderate water, Central Valley2.67 gal/sq ft in JulyIvyHedera helixmoderate water, Central Valley2.67 gal/sq ft in JulyGrapevinesVitis vinifera ssp. & cvs.moderate water, Central Valley2.67 gal/sq ft in JulyClematisClematis & ssp., hybrids & cvs.moderate water, Central Valley2.67 gal/sq ft in JulyStrawberriesFragaria spp. & cvs. (CA native and non-natives species)moderate water, Central Valley2.67 gal/sq ft in JulyCarpet BugleAjuga reptans (shade)moderate water, Central Valley2.67 gal/sq ft in JulyGreen Supreme ManzanitaArctostaphylos uva-ursi 'Green Supreme'moderate water, Central Valley2.67 gal/sq ft in JulyMassachusetts ManzanitaArctostaphylos uva-ursi 'Massachusetts'moderate water, Central Valley2.67 gal/sq ft in JulySerbian BellflowerCampanula poscharskyanamoderate water, Central Valley2.67 gal/sq ft in JulyEvergreen ClematisClematis armandiimoderate water, Central Valley2.67 gal/sq ft in JulyBunchberryCornus canadensismoderate water, Central Valley2.67 gal/sq ft in JulyKenilworth IvyCymbalaria muralismoderate water, Central Valley2.67 gal/sq ft in JulyWinter CreeperEuonymus fortunei radicansmoderate water, Central Valley2.67 gal/sq ft in JulyCranesbillGeranium spp.moderate water, Central Valley2.67 gal/sq ft in JulyGreen CarpetHerniaria glabramoderate water, Central Valley2.67 gal/sq ft in July

Similar plants that need less water 16

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

BougainvilleaBougainvillea & spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyWisteriaWisteria spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyLantanaLantana camara ssp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyJunipersJuniperus spp. & cvs.low water, Central Valley1.07 gal/sq ft in JulyYarrowAchillea millefolium (non-native hybrids)low water, Central Valley1.07 gal/sq ft in JulySagebrushArtemisia spp. (shrubby)low water, Central Valley1.07 gal/sq ft in JulyFlowering WoodbineLonicera periclymenumlow water, Central Valley1.07 gal/sq ft in JulyCalifornia Native YarrowAchillea millefolium (CA native cultivars)low water, Central Valley1.07 gal/sq ft in JulyWoolly YarrowAchillea tomentosalow water, Central Valley1.07 gal/sq ft in JulyGround Morning GloryConvolvulus mauritanicuslow water, Central Valley1.07 gal/sq ft in JulyRock CotoneasterCotoneaster horizontalislow water, Central Valley1.07 gal/sq ft in JulyFleeceflowerFallopia baldschuanica (Polygonum aubertii)low water, Central Valley1.07 gal/sq ft in JulyCarolina JessamineGelsemium sempervirenslow water, Central Valley1.07 gal/sq ft in JulySouth African GeraniumPelargonium sidoideslow water, Central Valley1.07 gal/sq ft in JulyLippia GroundcoverPhyla nodiflora (Lippia nodiflora) cvs.low water, Central Valley1.07 gal/sq ft in JulyCecile Brunner RoseRosa 'Cecile Brunner'low 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 honeysuckle, 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 honeysuckle in summer?

In July, established honeysuckle in loam needs a deep watering about every 8 days in the Central Valley, about every 27 days on the south coast and about every 22 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 honeysuckle need per day?

In July in the Central Valley, established honeysuckle needs about 0.3 gallons a day for a plant 2 feet across and about 1.1 gallons a day for a plant 4 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 honeysuckle change across California?

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

Why does honeysuckle wilt in the afternoon?

A large leafy vine can droop during heat without its root zone being dry. Check again at dawn and feel beneath the surface before irrigating. Persistent limpness over dry ground supports a deep soak.

How do I water newly planted honeysuckle?

Feel the nursery root ball separately from nearby ground because it can dry sooner. Apply water over that ball and the surrounding soil. Widen coverage during establishment as roots move outward.

Why does my potted honeysuckle dry so fast?

A full trellis can carry more leaf growth than a small container can readily support. Check whether roots have filled the available mix and shade the pot in hot weather. Prune the top to keep it manageable instead of relying on small repeated sips.

Can you overwater honeysuckle?

Yes. Check moisture beneath the main honeysuckle crown and beneath rooted runners separately. A wet crown can develop rot while distant rooted stems remain dry.

Does this advice cover coral or cape honeysuckle?

No. The ratings belong to Japanese honeysuckle, Lonicera japonica. Coral honeysuckle is another Lonicera, while cape and Mexican honeysuckles are unrelated shrubs sharing the common name.

More plant watering guides

ClematisLilacsSpireaButterfly BushStrawberriesSageAmur MapleFernleaf Maple

Sources