Recorded Webinar – A Forager’s Guide to Seaweeds


A recorded webinar exploring 16 of the UK’s most abundant, accessible, delicious and nutritious seaweeds. Features on location films, cookery demonstrations, advice on drying seaweeds/buying a dehydrator, and lots more.

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“This was absolutely brilliant, thank you so very much for being so generous with your knowledge! Also the webinar format of videos and live worked fantastically!” – Sarah Hobbs, Webinar chat comment

Take a plunge into seaweeds…

Join full time foraging teacher Mark Williams for a deep dive into the delicious and nutritious world of seaweeds.

Please play the video to see what to expect.

The webinar is designed to give you all the information you need to get started safely and sustainably foraging seaweeds and how to use them in your diet.

“Fantastic mark! Thanks for bringing me to the sea <3” – Lucy OHagan, Foraging Teacher

Areas covered include:

  • What seaweeds are and a little bit of their science
  • The important jobs seaweeds play in nature
  • Safe, considered and sustainable harvesting strategies
  • In-depth coverage of 16 rewarding seaweeds that are easily found along UK coasts
  • Cleaning, processing and preserving seaweeds
  • The nutritional properties of seaweeds
  • How to use seaweeds in the kitchen
  • How to dehydrate seaweeds
  • Guide to getting the right dehydrator for you
  • Recipe ideas and demonstration videos
  • Recorded question and answer sessions
  • Further reading and resources to take your learning forward

See below for full details of all the areas explored and running order.

Please note: This webinar is focussed on UK seaweeds. While much of the information, and many of the seaweeds covered are relevant to other areas of the world, some may not be.

“Fantastic webinar – thanks for all the time and consideration you put into compiling it. Worked really well with the mix of videos, chat and slides. Brilliant thank you!” – Johanna, Webinar chat comment

“I would like express my thanks for the webinar. I certainly benefited from all your hard work – such brilliant information which you conveyed with humour and passion”.  – Julia Russell, Herbalist, Iridologist, Reflexologist and Therapeutic Massage Practitioner

This webinar is aimed at beginners, and more experienced foragers who wish to connect more deeply with the subject.

The full webinar lasts for around 2 hours 17 minutes, comprising

  • A verbal presentation with photographs, diagrams, illustrations and tables
  • Recorded on-location videos showing the seaweeds in their natural habitats, with detailed identification, sustainable harvesting, preserving and usage information
  • Recorded videos showing preserving techniques
  • Recorded videos demonstrating seaweed recipes
  • A question and answer session recorded with the 100 viewers of the live webinar

Clear information about identification, harvesting, seasonality and usage. ©

“I really enjoyed the films, especially good for ID purposes” – Paul, Webinar chat comment

How it Works:

  • On completion of purchase you will be emailed a link and password to view the webinar on this website, with links to associated articles
  • The link is valid for a minimum of 1 month from the date of purchase
  • The webinar can be viewed as many times as you like while your link is valid
  • You can not share or download the webinar

“Thanks Mark, that was amazingly informative and great fun. Keep up the good work!”– Demi Sutherland, Webinar chat comment

Exploring seaweed processing and preservation

“Absolutely loved the presentation and detailed descriptions! Thanks for sharing your passion. Looking forward to seeing more of you, will definitely recommend!!” – Julie, Webinar chat comment

“Thanks for the webinar it was brilliant! Packed with a great amount of information, really enjoyed it 🙂” – Wild Pickle on Instagram

“The webinar was amazing! You are a good storyteller. Scientific information, combined with tips and beautiful picturing. 👏” – Kanlenaki on Instagram


Seaweed recipes and cookery demo

“Thanks very much Mark, was a great presentation, really enjoyed it, and the films and music worked really well!” – CarolAnne, Webinar chat comment

Full Webinar Contents and Running Order

0.00 Introduction

2.20 What are seaweeds? – The diversity of seaweeds

4.05 The role of seaweeds in Earth’s evolution

6.05 The importance of seaweeds – Kelp forests – Biodiversity – Ecological structures – Rockpools

9.50 Seaweed anatomy – Key structures and terminology

12.40 The legalities of seaweed harvesting – Advice/legal review – England and Scotland – Personal v Commercial use

14.44 Sustainable and Considerate seaweed harvesting – General tips and advice (covered in species-specific detail in Species Focus Films) – Giving back to degraded habitats – Foragers v Plastic

17.45 Safety when identifying and eating seaweeds – Species to avoid – Acid Weed

19.20 On Location Film: General Seaweed Foraging Advice – Where to look, where to avoid – pollution risks – dead seaweeds – water quality – sources for water quality information – estuarine waters

28.44 Tidal zonation of seaweeds – Ecological niches

29.53 Species Focus Film: Gutweed (Ulva spp) –  Identification – Sustainable harvesting – Tidal niche – Processing –  How to use

34.00 How tides work – Moon phases – Spring tides

36.10 Tide Apps and Tables  – Recommended apps

37.10 Species Focus Film: The Wracks – Channeled Wrack – Spiral Wrack – Egg Wrack – Bladder Wrack – Tooth Wrack – Seaweed baths – Identification – Sustainable harvesting – Tidal niches of wracks – Processing wracks – Wracks in the kitchen – Male v Female egg wrack

46.10 Staying Safe while Seaweed Foraging

47.35 Species Focus Film: Wrack Siphon Weed – Identification – Sustainable harvesting – Tidal niche – Processing –  How to use

50.13 Species Focus Film: Dumont’s Tubular Weed –  Identification – Sustainable harvesting – Tidal niche – Processing – How to use

55.25 Raw v Cooked seaweeds – Flavour chemistry – Terpenes

57.06 Seaweed Harvesting Timetable – Best times to harvest different species

58.05 Species Focus Film: Sea lettuce –  Identification – Sustainable harvesting – Tidal niche – Processing – How to use

1.00.00 The Nutritional Properties of Seaweeds – Nutritional profiles – Bio-availability of nutrients – Variation within species – Variation between locations

1.02.55 Key health benefits of seaweeds – Thyroid (+/-)  – Gut health – Osteoarthritis – Biodiverse eating

1.04.10 Species Focus Film: Nori/Laver – Identification – Sustainable harvesting – Tidal niche

1.09.30 Film: Processing Laver – Including general advice on washing, processing, drying and storing seaweeds

1.16.20 Film: Laver in the Kitchen – Recipe ideas – How to cook – Seaweed stock

1.17.25 Film: How to make and serve Laverbread (recipe – with a few optional wild twists) – Freezing laver

1.21.34 Can I Use Washed Up Seaweed? (Q&A)

1.22.49 Species Focus Film: Pepper Dulse – Identification – Sustainable harvesting – Tidal niche – Gastronomy – Royal Fern Weed

1.27.24 Drying Seaweeds – General advice

1.28.45 Dehydrators – Solar dehydrators – Different types of electric dehydrators and their strengths and weaknesses – Cost – Recommended buys – Tips for using dehydrators

1.32.47 Species Focus Film: Carrageen/Irish Moss – Identification – Sustainable harvesting – Tidal niche – Gastronomy – Carrageen pudding – Healthy tea – Lookalike (Grape pip weed)

1.36.27 Recommended Seaweed Guidebooks

1.39.07 Species Focus Film: Dulse –  Identification – Sustainable harvesting – Tidal niche – Gastronomy

1.43.30 Variation in flavour between Pepper Dulse at different locations (Q&A)

1.45.20 Species Focus Film: The Kelps – Oarweed – Forest Kelp – Sugar Kelp –  Identification – Sustainable harvesting – Tidal niche – Gastronomy – As flavouring – As pasta substitute – As wrapping (“Sous Weed” cookery) – As crisps (2 methods)

1.54.13 Grinding seaweed powders (Q&A)

1.54.42 Deeper dive into low-impact kelp harvesting strategies (Q&A)

1.56.15 Recommended Seaweed Websites

1.59.50 Using Seaweed on the Garden (Q&A) – Considerate harvesting of dead seaweeds

2.01.00 Risk from Dead Seaweed (Q&A)

2.01.40 Sea water quality testing kits (Q&A)

2.03.05 Seaweed Foraging Scotland/UK East coast (N Sea) (Q&A)

2.04.19 Seaweed in Estuaries (Q&A)

2.06.22 Best Seaweed Storage Practices (Q&A)

2.08.24 Sloke/Slake what is it? (Q&A)

2.10.10 Tinned laver and Traditional Welsh Laverbread (Q&A)

2.11.33 Receptacles and Equipment for Harvesting Seaweed (Q&A)

2.14.08 Future Galloway Wild Foods Webinars (Q&A)

“You answered all my questions before I asked them – and so much more! I feel well prepared to eat more seaweed! – Peter, Live Webinar Chat

As a special bonus, my dog Gripper “video bombs” a few of the films!

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