
Transform fabric with plant-based colors for sustainable artistry.
Reviewed May 18, 2026
Getting started
Understand mordanting
A mordant (from Latin mordere, to bite) bonds dye molecules to fibre — without it most natural dyes wash out quickly. Aluminium potassium sulphate (alum) at 15% weight of fibre (WOF) is the standard first mordant for both wool and cotton.
Dye your first skein with onion skins
Yellow onion skins produce a reliable, fast yellow-gold on wool with alum mordant. They contain enough dye to colour 2–4× their dry weight in fibre. The first dye bath teaches the wet-out, mordant, and dye process end to end.
Learn the difference between cellulose and protein fibres
Protein fibres (wool, silk, alpaca) mordant easily with alum and take most dyes readily. Cellulose fibres (cotton, linen) need a tannin pre-treatment before alum, or a different mordant chemistry, to achieve similar depth of colour.
Sharing and contribution
Produce a plant-dyed yarn or fabric line
A consistent range of naturally dyed skeins or yardage for sale — each labelled with dye plant, mordant, and fibre. Natural dyers command a premium from makers and weavers seeking sustainable materials.
Teach a natural dyeing workshop
A 3-hour workshop covering mordanting, a simmer dye bath, and take-home swatch samples. The Slow Textile movement and local spinning guilds are the natural audiences for natural dye teaching.
Take a beginner Natural Dyeing course
A structured course is the fastest way past the awkward beginner stage. Browse highly-rated natural dyeing classes for beginners.
Take the free quiz to rank the full catalog by your time, motivation, and setup — about five minutes.
5 stages · 20 milestones
Tick off milestones as you go — from first session to confident practitioner. Progress saves to your account so you can pick up where you left off.
Understand mordanting
A mordant (from Latin mordere, to bite) bonds dye molecules to fibre — without it most natural dyes wash out quickly. Aluminium potassium sulphate (alum) at 15% weight of fibre (WOF) is the standard first mordant for both wool and cotton.
Find gearDye your first skein with onion skins
Yellow onion skins produce a reliable, fast yellow-gold on wool with alum mordant. They contain enough dye to colour 2–4× their dry weight in fibre. The first dye bath teaches the wet-out, mordant, and dye process end to end.
Find gearLearn the difference between cellulose and protein fibres
Protein fibres (wool, silk, alpaca) mordant easily with alum and take most dyes readily. Cellulose fibres (cotton, linen) need a tannin pre-treatment before alum, or a different mordant chemistry, to achieve similar depth of colour.
Join a natural dye community
r/dyeing is small but active. The Natural Dye Forum (WOAD UK) and Association for Natural and Undyed Textiles (ANAT) connect dyers with specialist knowledge on historic recipes and plant sourcing.
Join r/dyeing~$210
Core gear to get going. Estimates from curated picks; actual spend varies.
+~$42
Nice-to-have upgrades once you know you are sticking with it.
Links open Amazon with your affiliate tag. Prices are ballpark catalog values.
Shop starter kits on Amazon