Empowering Communities, Transforming Lives. G-BiACK is a training and demonstration center that promotes agroecological agriculture, food sovereignty and environmental conservation through the GROW BIOINTENSIVE method.
Our double-dug beds and cold composting methods regenerate even the most depleted soil up to 60 times faster than nature — with no chemicals, ever. Healthy soil is the foundation of everything.
Kenyan smallholders trained by G-BiACK consistently produce 2 to 6 times more food on the same land — enough to nourish their families, share with neighbours, and sell at local markets.
From seed saving to artisan income generation, we train women, youth groups, schools and farmer cooperatives across Central, Eastern and Nairobi Counties — building lasting self-reliance.
Founded by Samuel and Peris Nderitu — both graduates of the Manor House Agricultural Centre — G-BiACK is a registered Kenyan NGO and training centre that promotes agroecological agriculture, food sovereignty and environmental conservation through the GROW BIOINTENSIVE method. The organisation has trained over 30,000 smallholder farmers since 2008.
160+ organically grown double-dug beds — vegetables, grains, legumes, fruit trees, and a man-made river for year-round irrigation.
Ecology Action (USA) partner organisation — part of the global GROW BIOINTENSIVE movement researched over 50 years by John Jeavons.
Winner of the 2012 Food Sovereignty Prize — recognised internationally for transforming food systems at the grassroots level.
100% of international donations reach the farm — zero overhead deducted from contributions made through Kilili Self Help Project.
Training farmers in the 8 essential elements of GROW BIOINTENSIVE — double-digging, composting, biointensive spacing, companion planting, and open-pollinated seeds.
Community seed banks preserve indigenous varieties. Farmers learn to save, clean, store and exchange their own seeds — reducing dependency and protecting agricultural heritage.
Tree nurseries, biogas systems, energy-saving cook stoves, solar technology, and zero-waste composting reduce environmental damage and build community climate resilience.
Clothing-making with 10 sewing machines, basket weaving, pottery and agribusiness skills build economic independence for women and young people in rural communities.
Kenya's premier seed sovereignty gathering — uniting farmers, community leaders and seed savers each year. Next edition: 28 August 2026, Thika.
Smallholders trained across Central, Eastern and Nairobi Counties since 2008.
Organically grown double-dug beds on campus — a living model farm open to all.
Biointensive farmers consistently produce 2–6 times more food on the same land.
GROW BIOINTENSIVE rebuilds soil health up to 60 times faster than nature when correctly practiced.
Grace Musyoki and Agnes Kileti from Mwanga Community no longer buy seeds each season. Their community seed bank saves money, protects heritage varieties, and gives them real independence.
One farmer's biointensive soil held enough moisture through Kenya's most severe drought in years. Today he hosts field days teaching the whole community his methods.
Seeing his father's thriving biointensive farm, a young man gave up city work and returned home. Together they expanded their beds and proved farming can be a dignified, profitable career.
G-BiACK is a registered NGO in Kenya. 100% of international contributions go directly to farmer training and community outreach — zero overhead deducted. Your donation is tax-deductible.
The latest edition of GB-NEWS — G-BiACK’s weekly bulletin on our activities, seed sovereignty, and community stories from across Kenya.
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