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Lonicera, Honeysuckle, Late Dutch Honeysuckle, Woodbine 'Graham Thomas'

Lonicera periclymenum

Family: Caprifoliaceae (cap-ree-foh-lee-AY-see-ee) (Info) (cap-ree-foh-lee-AY-see-ee) (Info)
Genus: Lonicera (luh-NIS-er-a) (Info)
Species: periclymenum (per-ee-KLY-men-um) (Info)
Cultivar: Graham Thomas
Additional cultivar information:(aka G.S. Thomas)


Vines and Climbers

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Grow outdoors year-round


15-20 ft. (4.7-6 m)


20-30 ft. (6-9 m)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade


Parts of plant are poisonous if ingested

Bloom Color:

Bright Yellow

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall




Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From softwood cuttings

From semi-hardwood cuttings

From hardwood cuttings

By simple layering

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Englewood, Colorado

Palmetto, Georgia

Roslindale, Massachusetts

Fort Jennings, Ohio

Souderton, Pennsylvania

Gardeners' Notes:


On Apr 2, 2014, coriaceous from ROSLINDALE, MA wrote:

In the Eastern US, where Japanese honeysuckle (Lonicera japonica) is prohibitively invasive, L. periclymenum is a good fragrant twining honeysuckle, vigorous but not invasive. The fragrance is sweet and not heavy, strongest in the evening.

This species isn't aggressive in the garden, nor does it invade natural areas here (Boston Z6a). According to BONAP, it has naturalized only in three states (Maine, coastal Washington and coastal Oregon) and three provinces (Nova Scotia, Ontario, and British Columbia).

'Graham Thomas' differs from the species only in the clear yellow flowers lacking a purplish tint. The Royal Horticultural Society has given this cultivar its coveted Award of Garden Merit. In the 2012 RHS honeysuckle trials, this cultivar was the most florife... read more


On Nov 15, 2013, RosinaBloom from Waihi,
New Zealand (Zone 1) wrote:

Honeysuckle 'Graham Thomas' - RHS Award of Garden Merit


On Jun 10, 2011, Hudson3 from Hudson, NY wrote:

Not to be confused with L. 'Belgica', 'Serotina' (or other cultivars) . According to Michael Dirr (and others) "Graham Thomas is soft yellow without traces of purple."


On Feb 10, 2006, TBGDN from (Zone 5a) wrote:

This is a very nice plant, but my experience is that too many vendors would just as soon sell you the Brooklyn Bridge if they could get away with it. I give up trying to find a reputable vendor for this since I have gotten anything but the true plant and wasted $$$!