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Ecovillage Silimalombu on the shore of Lake Toba

Ecovillage Silimalombu

An organic food forest on the shore of Lake Toba, Samosir Island.

Ratnauli Gultom

Welcome!

Since 2008 Ratnauli Gultom, youngest daughter of the King of Silimalombu, has been building an ecovillage on the ancestral land of the Gultom clan together with her husband Thomas – with permaculture, without pesticides, with solar power and a zero-waste concept. Since 2025 Ratnauli is also a certified yoga teacher of the Yoga Alliance (USA).

Organic tea from Silimalombu

Products

More than 100 products from our garden: organic herbal teas, cold-pressed candlenut oil, Mangga Toba products, cacao, coffee, spices and seeds.

Shop online →

Lake Toba lobster at the Silimalombu buffet
Daily 12–19 h · Rp 100,000

Restaurant

The garden is our menu: all you can eat, everything from our farm – including a tasting of our fermented mango products. Around 30 guests enjoy it every day.

Restaurant & buffet →

Ratnauli Gultom in the mango forest of the Botanical Garden
Open daily 9–18 h

Botanical Garden

Walk through our 10 ha garden of edibles, learn more than 80 plants from the old mango forest – and find the products we make from them in our shop.

Explore the plants →

Our solar boat on Lake Toba
Boats · Cars · Motorbikes

Tours, Transfers & Rentals

Explore Lake Toba with our boats, cars and motorbikes: transfers, excursions, airport pick-up and rentals for our guests.

Tours & rentals →

Farmstay Silimalombu
+5 new apartments · Christmas 2026

Farmstay

Stay in our traditional Batak guesthouse in the middle of the garden. From Christmas 2026, 5 new apartments are available in the Yoga Center building – reserved for participants during yoga retreats, otherwise rented as regular farmstay rooms.

Prices & booking →

Yoga Center Silimalombu at sunset
Opening February 2027

Yoga Center

Our new yoga center with a view over Lake Toba. It opens on 15 February 2027 with the three-week opening program “The Living Caldera”.

Yoga Center & program →

♨ Coming early 2027
Early 2027

Wellness Area

A new wellness area between the old and the new house: sauna and hot whirlpool – heated with the waste heat of our cold storage.

Sauna Wellness Days →

What’s next

  • 30-ton cold storage for mangoes – mango ice cream all year round
  • Its waste heat powers our new wellness park: sauna & hot whirlpool
  • The Yoga Center opens on 15 February 2027 with the program “The Living Caldera”
Ratnauli Gultom with King Willem-Alexander and Queen Máxima in Silimalombu, 2020

Guests from all over the world

On 12 March 2020 King Willem-Alexander and Queen Máxima of the Netherlands visited Ecovillage Silimalombu. The Indonesian Minister of Tourism, universities from Indonesia, Malaysia and Singapore and thousands of local and international guests have come here to learn about sustainable living. See what the media report about us →

Contact

Ratnauli Gultom · UD. Laketoba.net
Silimalombu, Kec. Onan Runggu, Kab. Samosir, North Sumatra 22394, Indonesia
WhatsApp: +62 812 6085 8209 · Email: r@laketoba.net · Instagram: @ecovillage_silimalombu

Our Vision

LAKE TOBA THE FUTURE – Our Vision


This is our vision for the future of Silimalombu, Samosir Island, Lake Toba and beyond. This is the work we are already doing, the projects we are working towards and the dream that drives us. This is the network of individuals, organizations and partners who believe that this vision can be a reality and who are already taking action themselves.

Our vision is a ecosystem of related values.

We believe in collective empowerment. We challenge the world view that wealth is based on money. Instead we value our relationships to each other and the riches that we are surrounded by in the natural world. We harness the power of the natural world such as solar energy that is plentiful and free. We want to share this with our community and empower them. We want to be self-reliant and propose an alternative, resource-based economy.

We believe deeply in ecology our relationship to Nature and how we can restore the balance between the natural world and how we live our lives. We defend our environment against those that damage it, or threaten it, for the sake of profit. We turn to the earth and the lake for our sustenance and sustainable living.

We believe in innovation fusing our old cultural wisdom with new technology. Learning, giving and sharing will enable us to evolve towards a future that is fertile and beneficial for all.

We believe in connecting with ourselves, each other, and nature.

We want you to join us!

Our Mission

We create a permaculture paradise. We have the focus on plants, what you can eat. We look, were the plants want to grow and help them to do this. We work with the nature and not against them. We work fully organic. We reduce our ecologic foodprint at each of our operations. We want to reach the Zero Emission. We work on it, that all our food come out of our nature. We create products out of the nature and sell them directly to our guests. We are independent from the money, because we have the richness of our nature, were we take care of.

We want to give to all of our visitors and guests inspiration for their way of lifestyle:

  • How to eat healthy food?
  • How to prepare healthy food?
  • How to reduce chemicals and cosmetics?
  • How to prepare raw food meals?
  • How to go around with resources responsible?
  • How to reduce waste?
  • How to plant herbs and fruits just at home?
  • How to work on your family, neighbors, friends, working place and government to live sustainable?
  • How to make your own energy?

We give examples and also train the people to work on it in an easy way.

Also we work on effectivity: How to use the time and the resources to reach the aim in the best way? How to make things better. We are always open for new ideas, which directly can be tried and used. And we know, we can fail. To fail just means, we are able to learn.