Kalahari Melon (Tsjammas) – A Namibian Treasure for Food, Oil and Income

Introduction

The Kalahari Melon (Citrullus lanatus var. citroides)—known locally in Namibia as Tsjammas, Tsamma, or wild watermelon—is more than just a fruit of the wild. It is a plant of ancient heritage, drought resilience, and economic promise. Once overlooked as a subsistence food or livestock supplement, this underutilised crop is emerging as a commercially viable oilseed that fits perfectly within Namibia’s arid and semi-arid zones.

With its deep cultural roots, climate-smart properties, and international cosmetic demand, the Kalahari Melon is poised to become a game-changing crop for Namibian farmers, especially those in marginal areas unsuited for conventional crops.

What is the Kalahari Melon?

Often confused with the commercial sweet watermelon, the Kalahari Melon is a wild ancestor. Its flesh is pale, fibrous and bitter, but its seeds are nutrient-rich, making it ideal for oil extraction. The plant is hardy, growing well in poor soils, with minimal water, and even acts as a natural soil cover.

Botanical Name: Citrullus lanatus var. citroides

Common Names: Tsamma, Tsjammas, Wild Watermelon, Kalahari Melon

Local Names: Oshiwambo – oshidhingoloko, Otjiherero – ozongombe zondjou, Nama – tsamma

Traditional and Current Uses

Nutrition and Food Security

The fruit contains up to 90% water, and was traditionally used by San and Nama communities as a survival food in the dry season.
Boiled or roasted seeds are consumed as a snack, rich in protein and essential fatty acids.
The seedcake (residue from oil extraction) is used as livestock feed.

Cosmetic and Skincare Industry

The extracted Kalahari Melon Seed Oil is a prized ingredient in high-end cosmetic products. It is:

Rich in linoleic acid (omega-6), vitamins A, C and E
Light, fast-absorbing and non-comedogenic
Known to promote skin hydration, anti-ageing, and cell regeneration

Major cosmetic brands in Europe and Asia are already incorporating this oil into natural skincare formulations, and global demand is increasing.

Livelihood and Commercial Potential

Seeds fetch a high value for oil pressing.
The oil is exported or used locally in value-added products such as soaps, balms and creams.
Processing generates residual biomass used for feed or compost.

Why Kalahari Melon Makes Sense for Namibia

Drought-resilient: Requires minimal water, thrives under 250–400 mm rainfall.
Low-input crop: No fertilisers or irrigation needed, making it ideal for resource-poor farmers.
Indigenous and adapted: Co-evolved with Namibian wildlife and climate.
Climate-smart: Helps build resilient agro-ecosystems while offering a new income stream.
Strong export potential: Oil is sought after in the global natural cosmetics market.

Success Stories and Case Studies

Namaloe Project

As seen in the poster, Namaloe is supporting farmers by:

Offering a guaranteed seed market
Setting up oil pressing facilities
Operating in 5 conservancies across 5 regions

This model not only creates local income, but also builds processing capacity and rural employment, especially for youth and women.

Local Women’s Cooperatives

In the Kunene and Omaheke regions, women-led groups are using traditional methods to harvest, clean and dry seeds, then supply them to buyers in Windhoek or directly to exporters.

Agricultural Guidelines

Soil: Prefers sandy or loamy soil, but highly adaptable.
Planting: Direct seeding in pits or furrows at onset of rains.
Spacing: 1.5m x 1.5m
Harvesting: Fruits mature in ~90 days; seeds are extracted and sun-dried.
Pests: Generally pest-tolerant; low incidence of diseases.
Seed Storage: Keep in dry, well-ventilated conditions. Seeds can be stored for multiple seasons.

Cultural Relevance

The Kalahari Melon has always been part of traditional knowledge systems. San communities used the plant to:

Track animal migration (fruits were signs of water)
Sustain hydration during hunting
Make natural soap using its pulp and ash

These cultural practices can be revitalised and combined with modern approaches to build pride and identity around this indigenous crop.

Worthwhile Videos

How to Grow Kalahari Melon in Namibia – Agribusiness Namibia A step-by-step guide tailored for dryland Namibian farmers.
Tsamma Melon Oil Business in the Kalahari – BBC Africa A documentary showing rural women transforming lives through this crop.

Suggested Books and Resources

“Underutilized Crops: Kalahari Melon” – by ICRISAT & FAO (Focuses on domestication and commercial value) Download PDF
“Wild Fruits of Africa” – by Ben-Erik van Wyk (A botanical guide including wild melons and their traditional uses)
“Africa’s Forgotten Crops” – by PROTA (Plant Resources of Tropical Africa) (Scientific compilation of indigenous dryland crops)
Namaloe Website – https://naliloe.com

Certification and Organic Production

The crop is already grown without chemicals, making it ideal for:

Organic certification
COSMOS and Ecocert cosmetics approvals
FairWild or Fair Trade labelling

Smallholder groups could boost profits through certified organic oil sales.

Challenges and Considerations

Lack of awareness: Many farmers see it as a weed or poor man’s fruit.
Value chain gaps: Limited seed buyers and processing centres.
Training needed: Post-harvest handling affects seed quality and price.
Transport costs: Rural farmers may struggle to access markets.

Solutions include:

Farmer cooperatives
Solar drying units
Mobile seed graders
Local oil pressing and packaging hubs

Future Potential

The Kalahari Melon is more than a niche product. With strategic investment, it could:

Become a national export product
Contribute to Namibia’s green economy
Create youth employment in agro-processing
Promote regenerative dryland agriculture

Rediscovering the Desert’s Wealth: A Deeper Look at Tsjammas

As Namibia continues to face the dual challenges of climate change and economic inequality, the Kalahari Melon—known locally as Tsjammas—is quietly positioning itself as one of the country’s most promising yet underutilised resources. This rugged plant, often dismissed as a weed or survival food, is rapidly gaining recognition not just for its historical role in indigenous culture, but for its potential to create profitable value chains and resilient agroecosystems in Namibia’s most marginal lands.

Tsjammas thrives where other crops fail. It grows wild in sandy soils with very little rainfall, often appearing after just one decent downpour. While its fruit is not palatable in the way of commercial watermelon, its true value lies hidden in its seeds—tiny powerhouses packed with oil that is increasingly in demand from the global natural cosmetics industry. At the same time, the plant offers a blueprint for regenerative land use, rural income generation, and female-led enterprise. In short, it is a perfect example of what Namibia needs more of: crops that align with our ecology, culture, and economy.

From Survival Food to Skincare Gold

Historically, Tsjammas was a lifeline for desert communities such as the San, Nama, and Damara peoples. During dry spells, the water-rich fruits could be cracked open to hydrate travellers and hunters. In the absence of fresh water, women would even wash with the pulp. In these communities, knowledge of the plant’s lifecycle, harvesting patterns, and storage techniques has been passed down over generations.

What’s new, however, is the commercial lens through which we are now viewing this species. The cold-pressed oil extracted from the seeds is light, golden, and rich in essential fatty acids. It has gained popularity in Europe, South Korea, and the USA for its ability to moisturise skin, reduce inflammation, and repair damaged tissue without clogging pores. Its non-greasy texture makes it a favourite for serums and luxury oils. This growing interest has sparked a re-evaluation of Tsjammas in Namibia—not just as a wild food, but as a crop worth cultivating on purpose.

Farmers Adapting to the New Reality

In southern and central Namibia, a quiet shift is underway. Farmers who once planted only mahangu or beans are beginning to experiment with Tsjammas. In Hardap, one cooperative reports having earned over N$ 50,000 from just four hectares of melon seed collection and sale. Another farmer near Okondjatu explains how he used to uproot the creeping vines during field preparation. “I thought they were in the way,” he admits. “Now, I plant them in the fence lines.”

What makes this crop so appealing is not just its low input cost, but its resilience in poor conditions. Unlike maize, which requires fertilisers and regular rainfall, Tsjammas grows without intervention. It suppresses weeds, reduces soil erosion, and brings in a second stream of income with almost no capital investment. This makes it ideal for emerging farmers, particularly those without access to irrigation, loans, or large machinery.

Building the Value Chain in Namibia

Until recently, most Tsjammas seed collected in Namibia was exported raw or pressed overseas. However, projects like Namaloe are changing that by investing in local pressing facilities, mobile seed cleaners, and farmer training. Their approach integrates community conservancies with market access, providing guaranteed buyback for farmers who produce high-quality seed.

Each step of the value chain offers employment potential. Women can be trained to clean, sort, and dry seeds. Youth can learn to operate solar dryers and small-scale oil presses. Entrepreneurs can package the oil into local skincare products—soaps, lotions, and hair serums—under proudly Namibian brands. In fact, there is even potential to explore export-ready cosmetic formulations under a Geographical Indication (GI), similar to the way “Argan oil” is marketed from Morocco.

As demand grows, Namibia must be ready not just to supply raw material, but to retain as much value as possible within the country.

Agronomic Insights and Intercropping Potential

From an ecological farming perspective, Tsjammas offers more than profit. Its trailing vines create natural ground cover that protects topsoil, reduces evaporation, and encourages microbial life in the soil. Some farmers are even experimenting with intercropping systems, combining Tsjammas with drought-tolerant legumes like cowpea or lablab, which fix nitrogen and enhance fertility.

Because the plant does not require fertilisers or pesticides, it also fits neatly into organic farming systems. In regions like Kavango West, where many households already practice low-input farming, integrating Tsjammas could offer a pathway to organic certification and premium prices in export markets.

Agricultural extension officers in regions such as Omaheke have begun incorporating the crop into demonstration plots, encouraging both traditional farmers and youth to give it a try. The key message: start small, test, learn, and scale up.

Challenges to Address

Despite all its benefits, several obstacles still stand in the way of large-scale adoption:

Awareness – Many Namibians still do not understand the crop’s economic value. To some, it’s just “a fruit for wild animals.”
Processing Gaps – There are still too few seed presses, dryers, or graders to handle high volumes.
Storage and Quality Control – Poor drying or contamination can result in lower oil yields or disqualified batches.
Market Confidence – Farmers are cautious about growing a crop without clear and consistent buyers.

These are not insurmountable barriers. With the right partnerships—between NGOs, government, cooperatives, and private buyers—these issues can be resolved. Extension materials in local languages, radio programmes, and WhatsApp-based farmer support groups could dramatically improve awareness and technique.

Youth and Women at the Centre

Tsjammas production is especially well-suited for women’s groups and youth entrepreneurs. Because it requires no ploughing, it can be grown along fence lines, between homestead trees, or on degraded land. Women-led cooperatives can manage the post-harvest steps: drying, shelling, grading, and packaging. In areas with high youth unemployment, processing hubs can offer skills training, business incubation, and even online sales channels for finished cosmetic products.

There is also scope for educational programmes at the school level. Teaching children how to identify, harvest, and process Tsjammas can help create intergenerational knowledge while promoting entrepreneurship from an early age.

Reclaiming Indigenous Knowledge

In today’s rush for commercialisation, it is important to honour the indigenous custodians of Tsjammas knowledge. The San people, for instance, have used the plant for centuries—not just for food and water, but for spiritual and symbolic purposes. Its cyclical growth mirrored the arrival of rains, and its seeds were often stored for lean months.

As Namibia formalises this crop’s value, it should also recognise and reward traditional knowledge holders. This could be done through benefit-sharing arrangements, participatory research, and co-authorship in manuals and training videos.

Final Thoughts

The Kalahari Melon, or Tsjammas, is far more than a humble desert fruit. It is a climate-smart, income-generating, regenerative crop that aligns beautifully with Namibia’s unique landscape and needs. In a time when rural livelihoods are under pressure and rainfall is unpredictable, investing in such hardy and culturally rooted plants may be one of the smartest moves Namibia can make.

It is time to move beyond porridge farming. It is time to wake up and farm smart.

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