Sustainability
The Soil Under Rooibos Cannot Tell It Is Farmed
Someone sequenced the soil bacteria under wild rooibos and under a farmed field nearby. No significant difference turned up, which unpicks a tidy sustainability claim.
Rooibos Bushes Keep Turning Up Insects Without Names
Between 2020 and 2022, three leafhoppers new to science were collected on cultivated rooibos and described for the first time: Geelus dundraad, Colistra acapitatus and Colistra bucapitatus. None of the three does the plant any harm.
Somebody Fed Rooibos to Nine Hundred Tilapia
A 2025 trial at Walter Sisulu University fed fermented and green rooibos extract to 900 Mozambique tilapia for eight weeks. The green-rooibos fish got more growth out of the same feed, though the same fish showed liver changes the authors say need further work.
The Rooibos Patents Nestlé Quietly Let Lapse
In 2008 a Nestlé subsidiary filed five patents on rooibos and honeybush without the permit South African law required. None of them survive today, and the reason they vanished is quieter than most people expect.
The Climate Rooibos Needs Is Leaving Its Only Legal Home
European and South African law both restrict the name rooibos to a narrow, delimited stretch of the Cederberg and its neighboring valleys. A peer-reviewed bioclimatic model, and the farmers already testing its warning in the field, say that exact ground is growing less suitable for the plant, with nowhere the name can legally follow it.
The Same Long Steep That Is Kind to Rooibos Is Not Kind to a Mesh Tea Bag
Rooibos rewards a long steep at a full boil with no bitterness penalty. That exact combination, near-boiling water held for many minutes, is also what tea-bag research finds strips the most microplastic out of a nylon or polypropylene mesh bag.
The Red Bush Changes Its Own Soil, Then Changes It Back
Nobody fertilises a rooibos field. The plant grows in famously hungry soil by striking a daily bargain with bacteria that live in its own roots, one it renegotiates every morning and, by the record's own reading, lets lapse every night.
More of the Cederberg Is Under a Conservation Pact Than Under Rooibos
Rooibos farms in the Cederberg have signed more land into formal conservation agreements than the entire industry cultivates, a corridor that also keeps a camera-trapped leopard population, a dying cedar, and the plant's own wild backup moving.