Yellow Dyes

Part of Natural Dyes & Inks

Sources and methods for producing yellow dyes from plants and other natural materials.

Why This Matters

Yellow is the easiest and most abundantly available color in the natural dye palette. Dozens of common plants — weeds, garden flowers, tree bark, food scraps — produce some shade of yellow. This makes yellow the ideal starting point for any rebuilding community’s dyeing practice. You can begin producing useful, colored textiles immediately with materials likely growing within walking distance.

Yellow dyes are also the essential building block for the entire expanded color palette. Overdyeing yellow with indigo creates green — the most important secondary color. Overdyeing yellow with madder produces orange. Modifying yellow with iron gives olive and khaki. Without reliable yellow dyes, you are limited to reds, blues, and browns. With them, your palette expands dramatically.

However, not all yellow dyes are equal. Some are brilliantly colored but fade within weeks of sun exposure. Others are dull but extremely permanent. Knowing which sources provide the best combination of color quality and durability saves you from investing effort in plants that will only disappoint.

Yellow Dye Sources: The Best to Worst

Tier 1: Excellent Color and Fastness

Weld (Reseda luteola)

The finest natural yellow dye available. Used since ancient Egypt and throughout medieval Europe for the most permanent yellows achievable.

• Source: The entire above-ground plant — leaves, stems, and flower stalks
• Growing: Biennial; grows easily in poor soil and full sun. Self-seeds prolifically
• Harvest: Cut when flowers are fully open (second year)
• Preparation: Dry the plant material; chop or crumble before use
• Dye method:
  1. Soak chopped weld (100% WOG) in water overnight
  2. Heat to 80°C and hold for 45 minutes
  3. Strain out plant material
  4. Enter alum-mordanted fiber
  5. Maintain at 80°C for 45-60 minutes
  6. Cool in bath overnight for deepest color
• Color: Clear, bright, warm yellow
• Light fastness: Excellent — among the best of all natural yellows
• Wash fastness: Excellent with alum mordant

Osage Orange (Maclura pomifera)

Native to North America; one of the strongest natural yellow dye sources known.

• Source: Heartwood — the deep yellow interior of the tree
• Preparation: Chop or shave heartwood into small chips
• Dye method: Soak chips in hot water (80°C) for 2-4 hours; strain; dye fiber in the extract
• Color: Rich golden yellow to deep gold-orange
• Fastness: Excellent for both light and wash
• Note: A little goes a long way — 25-50% WOG is often sufficient

Pomegranate Rind (Punica granatum)

Dual-purpose: provides both tannin mordanting and yellow color.

• Source: Dried outer rind of pomegranate fruit
• Preparation: Dry rinds thoroughly, then break into small pieces
• Dye method: Simmer at 80°C for 1 hour; strain; dye with or without additional mordant
• Color: Yellow with warm golden undertone
• Fastness: Good to excellent; improves with alum mordant

Tier 2: Good Color and Acceptable Fastness

Onion Skins (Allium cepa)

Perhaps the most widely available dye source in any settled community.

• Source: Dry outer skins of yellow or brown onions
• Quantity: Collect continuously from kitchen waste; store dry
• Dye method:
  1. Pack skins loosely in a mesh bag (200-400% WOG — they are very light)
  2. Simmer in water for 30-45 minutes
  3. Remove bag; enter mordanted fiber
  4. Simmer for 30-45 minutes
• Color: Rich gold to deep orange-gold (yellow onions) or soft pink-tan (red onions)
• Fastness: Moderate to good — adequate for everyday garments but will fade in prolonged direct sun

Onion Variety	Mordant	Color Result
Yellow/brown skins	Alum	Deep gold
Yellow/brown skins	Iron	Olive green
Yellow/brown skins	No mordant	Light gold
Red onion skins	Alum	Soft pink-tan
Red onion skins	Iron	Gray-green

Goldenrod (Solidago species)

A common wildflower producing reliable yellows.

• Source: Flower heads, harvested at full bloom
• Dye method: Simmer flowers (200% WOG) for 30 minutes; strain; dye mordanted fiber
• Color: Warm, bright yellow
• Fastness: Moderate — holds up well indoors, fades in sustained outdoor exposure

Chamomile (Matricaria or Anthemis species)

• Source: Flower heads, fresh or dried
• Dye method: Simmer 200% WOG for 30-45 minutes
• Color: Soft, warm yellow
• Fastness: Moderate to good — better than most flower-based dyes

Tansy (Tanacetum vulgare)

• Source: Flower heads and leaves
• Dye method: Simmer 200% WOG for 45 minutes
• Color: Warm yellow to yellow-green
• Fastness: Moderate to good with alum

Tier 3: Easy to Find but Limited Fastness

Marigold (Tagetes species)

• Source: Flower petals (remove green parts)
• Color: Bright yellow to pale orange
• Fastness: Moderate — fades to pale yellow over one growing season of outdoor exposure
• Best use: Indoor textiles, ceremonial items, or overdyeing base

Dandelion (Taraxacum officinale)

• Source: Whole flower heads; also roots for brown-yellow
• Color: Pale to medium yellow
• Fastness: Moderate with alum; poor without mordant
• Note: Requires very large quantities (300%+ WOG) for visible color

Birch Leaves (Betula species)

• Source: Fresh green leaves, harvested in spring/early summer
• Color: Yellow to yellow-green
• Fastness: Moderate with alum
• Note: Color varies significantly by species and season

Tier 4: Avoid for Serious Dyeing

Turmeric (Curcuma longa)

• Produces an extremely bright, vivid yellow — initially very impressive
• Fastness: Very poor — fades dramatically within weeks of sun exposure and washes out progressively
• Use only for: temporary decoration, face/body paint, food coloring
• Never use for: trade goods, garments, or any textile expected to last

The Turmeric Trap

Turmeric is the most common beginner mistake in natural dyeing. Its initial brilliance is deceptive. Every experienced natural dyer has a “turmeric disappointment” story. Use weld, osage orange, or onion skins instead for any permanent application.

Dyeing Techniques for Maximum Yellow

Concentration and Multiple Baths

For the deepest, most saturated yellows:

1. First dye bath: Standard procedure with fresh dye material
2. Remove fiber and squeeze — do not rinse
3. Prepare a second fresh dye bath or refresh the first with additional plant material
4. Re-enter fiber and dye again
5. Repeat up to 3 times — each pass deepens the color
6. Three passes with weld can produce yellows approaching gold

Modifier Effects on Yellow Dyes

Base Yellow Dye	+ Alum	+ Iron	+ Copper	+ Alkaline Shift
Weld	Bright clear yellow	Olive green	Yellow-green	Slightly deeper
Onion skins	Deep gold	Dark olive	Amber-green	Orange shift
Goldenrod	Warm yellow	Sage green	Muted gold-green	Richer yellow
Osage orange	Rich gold	Olive-brown	Deep gold-green	Darker gold

Creating Specific Shades

Desired Shade	Method
Bright lemon yellow	Weld + alum, short dye time (30 min)
Deep gold	Weld or osage orange + alum, 2-3 dye passes
Amber/honey	Onion skins + alum, concentrated bath
Olive green	Any yellow + iron afterbath (see Iron Modifier)
Sage green	Goldenrod + iron modifier
Khaki	Light yellow + weak iron
Chartreuse	Yellow + brief indigo overdye (see Overdyeing)

Harvesting and Storing Yellow Dye Plants

Optimal Harvest Times

Plant	Best Harvest Time	Part Used
Weld	Full flower, second year	Whole above-ground plant
Goldenrod	Peak bloom	Flower heads
Chamomile	Full bloom	Flower heads
Tansy	Peak bloom	Flowers and leaves
Marigold	Full bloom	Petals only
Onion skins	Year-round	Dry outer skins
Osage orange	Any time (wood)	Heartwood
Birch leaves	Spring/early summer	Fresh leaves

Drying and Storage

1. Spread plant material in a single layer on screens or racks
2. Dry in shade with good air circulation — sun bleaches dye compounds
3. Store fully dried material in paper bags, cloth sacks, or sealed jars in a dark place
4. Label everything with plant name, harvest date, and location
5. Shelf life: Most dried yellow dye plants retain potency for 1-2 years; some (weld, osage orange) last much longer

Building a Year-Round Yellow Supply

Since yellow is the most commonly needed dye color, maintain reserves:

• Onion skins: Collect continuously from cooking — store in a large paper bag
• Dried weld: Harvest once per year; dry and store enough for the year’s needs
• Osage orange chips: Harvest once; a single branch provides many dyeings
• Seasonal flowers: Dry at peak bloom; store in labeled containers

Extraction Tips for Best Color

1. Soak before heating: Overnight soaking in cold water begins extraction gently, preserving delicate dye compounds
2. Never boil flowers: Most flower-based yellows are damaged by temperatures above 85°C. Simmer gently
3. Bark and wood tolerate higher heat: Osage orange, birch bark, and similar woody sources can be simmered at full temperature
4. Strain thoroughly: Plant debris left in the dye bath can cause spotting on the fiber
5. Exhausted baths still have color: After the main dyeing, use the leftover bath for lighter shades on additional fiber — waste nothing

Yellow dyes are the workhorse of the natural dye palette — abundant, accessible, and endlessly versatile when combined with mordants, modifiers, and overdyeing. Start with onion skins from the kitchen, plant some weld for next year, and you have a yellow dye supply that supports an entire community’s textile coloring needs.