Weld, Dyer's Rocket, Dyer's Broom, European Mignonette
Reseda luteola

Family: Resedaceae
Genus: Reseda (res-EE-duh) (Info)
Species: luteola (loo-tee-OH-la) (Info)

Category:

Biennials

Herbs

Perennials

Foliage Color:

Silver/Gray

Chartreuse/Yellow

Bloom Characteristics:

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

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Where to Grow:

Unknown - Tell us

Height:

24-36 in. (60-90 cm)

36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)

Spacing:

3-6 in. (7-15 cm)

6-9 in. (15-22 cm)

9-12 in. (22-30 cm)

Hardiness:

USDA Zone 1: below -45.6 C (-55 F)

USDA Zone 2a: to -45.5 C (-50 F)

USDA Zone 2b: to -42.7 C (-45 F)

USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

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)

Not Applicable

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Pale Yellow

Bright Yellow

Chartreuse (Yellow-Green)

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Foliage:

Grown for foliage

Herbaceous

This plant is resistant to deer

Other details:

May be a noxious weed or invasive

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

7.9 to 8.5 (alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

From seed; direct sow after last frost

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Bag seedheads to capture ripening seed

Collect seedhead/pod when flowers fade; allow to dry

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored

Gardeners' Notes:

0
positives
4
neutrals
0
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RatingContent
Neutral

On Apr 10, 2014, Boondoggler from Klamath Falls, OR wrote:

Came here to read more after having bought this plant's seeds. Online venders seem to disagree with this site's data and vary between saying the plant needs zone 5 or 6 for winter survival. Venders also claim this plant won't flower the first year.

Can someone find a reliable source to confirm this plant's true hardiness (e.g. a book, trusted gardening magazine, etc)? It would be nice to not have to baby this plant through the winter if I didn't need to (I'm at a zone 4b). Seeds are supposedly where the dye is most concentrated so flowers would be nice to have.

Neutral

On Aug 5, 2011, DMersh from Perth
United Kingdom (Zone 7b) wrote:

I've seen this growing on pure chalk rubble in an old quarry, it can clearly tolerate very poor soil as well as strongly alkaline conditions.

Neutral

On Mar 7, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

This is the oldest yellow dye plant in the world. It is again gaining popularity as an organic dye.

Neutral

On Jan 17, 2005, NatureWalker from New York & Terrell, TX (Zone 8b) wrote:

Biennial to 5', stems hollow, little branched; leaves entire, basal leaves narrowly oblanceolate, to 3" long, stem leaves narrowly oblong; racemes dense; sepals and petals usually 4, stamens 20-25; capsule 3-lobed nearly to middle, to 1/4" long.

A frequent biennial weed of mineral soils on rubbish dumps and disturbed ground; especially abundant in old limestone quarries. The plant is tall with a long spike of small yellow flowers and with narrow wavy-edged leaves.

Formerly cultivated as a source of a deep yellow dye; occasionally planted in collections of economic plants.

Naturalized in the United States. The root of this plant is conical, and resembles in taste and odor the garden radish. It contains allyl-sulphocyanate a volatile oil of mustar... read more