Galeopsis speciosa

RHS Plant Profile
large-flowered hemp nettle
large-flowered hemp nettle visionspictures.com

Other common names

penboeth amryllw

Synonyms

Galeopsis versicolor
Galeopsis tetrahit var. versicolor

Annual Biennial

A scattered annual wildflower found in much of the country but with a stronghold in Scotland. Reaching up to a metre tall, the square stems support toothed, oval leaves and are topped in mid-summer to autumn with whorls of pale yellow, hooded flowers with a purple lip, providing nectar and pollen for insects

Position

Full sun, Partial shade

Soil Types

Clay, Loam

Size

Time to Maturity
1 year

Growing Conditions

Clay Loam
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Lamiaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Bushy
Genus
Name Status
Correct

How to Grow

Cultivation

Occurs naturally in cultivated fields, waste ground and other disturbed areas. Tolerates a range of conditions provided the soil is reasonably moist

Propagation

Propagate by seed

Suggested planting locations and garden types

  • Wildlife gardens

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free