Japanese honeysuckle

মধুমতী

Lonicera japonica Thunb.

light
Sun–part
water
Medium
tall
8.5 m
wide
3.7 m

Caprifoliaceae

Also called LONJAP, Golden honeysuckle vine

Formerly Caprifolium brachypodum, Caprifolium chinense, Caprifolium japonicum, Lonicera aureoreticulata, and 10 more

When it flowers

Flowers December to July in the tropics.

Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.

PetsNo pet-safety information yet
PeopleNC State Extension lists it as poisonous (fruits) (25 Oct 2026)

If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.

Something wrong with it?

About it

Grows as
LianaKew's checklist, not yet checked
Climate
TemperateKew's checklist, not yet checked
Wild in
China to Temp. E. AsiaKew's checklist, not yet checked
Light
Full sun to part shade (3 h or more)Read from RHS and NC State Extension, checked by a majority of its sourcesBacked by both sources
Height
8.0 m to 9.0 mRead from RHS and NC State Extension, checked by a majority of its sourcesBacked by both sources. Sources differ: RHS 8–12 m; NC State Extension 16–29.5 ft
Spread
2.5 m to 4.9 mRead from RHS and NC State Extension, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: RHS 4–8 m; NC State Extension 3–6 ft
Water
Average: moist, well drainedRead from RHS and NC State Extension, not yet checked: its sources are splitTied: no reading has a majority of the 2 sources, so all are kept for a person to settle. Sources differ: RHS medium; NC State Extension low
Flowers
White, yellowRead from RHS, NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by all 3 sources
Coldest it survives
-21.9 °C (USDA zone 6a)Read from RHS and NC State Extension, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: RHS -15 °C; NC State Extension -28.9 °C

Not known yet: heat, hottest it survives.

Grow it with

Suggested by a rule, not by a gardener: same climate (kew), flowering when this plant does not (inaturalist), and a different shape.

In other languages (12)

Portuguese
Madressilva-dos-jardins
Chinese
金銀花, 忍冬, 左纏藤
Hawaiian
honekakala
Spanish
Madreselva asiática, Madreselva
Japanese
スイカズラ, 吸い葛
French
Chèvrefeuille du Japon, Clématite du Japon
Estonian
jaapani kuslapuu
German
Japanisches Geißblatt
Norwegian Bokmål
japankaprifol, Japankaprifol
Russian
Жимолость японская
Czech
zimolez japonský
Chinese (China)
忍冬, 金银花

Where this comes from

A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.