Reseda luteola

RHS Plant Profile

weld

Other common names

base rocket, Dutch pink, dyer's rocket, dyer's weld, dyer's yellow weed, wild mignonette, wild woad, yellow weed, dyer's weed, Jerusalem ash, melyn-gu

Annual Biennial

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A tall biennial, to around 1.5m high in flower, with lance-shaped, deep green leaves often with strongly wavy edges. Slender spikes of tiny yellow flowers are produced in summer. This plant can be used to produce a yellow dye

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 1–2 years
Max Spread: 0.1-0.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Neutral or Alkaline

Position

Full sun Partial shade

Aspect: East–facing or South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Resedaceae
Native to GB/Ireland: Yes
Foliage: Semi evergreen
Habit: Columnar upright
Genus: Reseda can be annuals or perennials, with simple or pinnately lobed leaves and small, star-shaped flowers in dense racemes in summer and autumn
Name Status: Correct

How to Grow

Cultivation

Grow in well-drained, preferably alkaline soil in full sun or part shade

Propagation

Propagate by seed, sown in situ in autumn for flowers the following summer. Do not cover, seeds need light to germinate. In colder areas, seedlings may need to be protected with a cloche over winter. Plants will self-seed in place; transplant with care as they dislike root disturbance

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
Wildflower meadow
Flower borders and beds
Wall side borders

Pruning

Deadhead if seeds are not required

Pests

Generally pest-free

Diseases

Generally disease-free