A boat that would not move

Water hyacinth packaging did not begin in a laboratory or a venture capital pitch deck. It began on a hot afternoon in Lake Naivasha, somewhere in Kenya’s Rift Valley, when a small wooden boat carrying a group of engineering students from Egerton University stopped moving. Not because the engine had failed. The water itself had thickened. A mat of glossy green leaves and lavender flowers had closed around the hull like a living net, and the lake — one of the country’s most photographed freshwater jewels — refused to let them through. They were stuck for hours. The plant suffocating their boat was water hyacinth, and one of the students, Joseph Nguthiru, would spend the next several years building a company around the question that began forming in his head while he waited.

Water hyacinth packaging is, on its face, a strange phrase. Most people have never heard of the plant. Those who have tend to know it the way the fishermen of Naivasha know it — as an enemy. Originally from South America, it was introduced to Kenya in the 1980s, reportedly brought in as an ornamental novelty by tourists who liked its purple blooms. Within a generation, it became, by UNEP’s reckoning, the world’s most invasive aquatic weed. It blankets surfaces. It blocks sunlight. It strangles oxygen out of the water column. It chokes nets, snaps propellers, and turns breeding grounds into dead zones. A 2023 study cited by the East African Journal of Environment and Natural Resources estimated annual losses across Kenya’s fishing, transport, and tourism sectors at somewhere between 150 and 350 million dollars.

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