David Attenborough's Miracle Plant Took 200 Years To Grow | Nature Bites

Summary

A South African plant known as the pincushion grew at Kew from seeds brought to Britain in 1803. The seeds had been found aboard a Dutch merchant ship captured by a British warship returning from the Cape of Good Hope. Their eventual germination, around 200 years later, illustrates how long some seeds can remain viable.

Kew’s Millennium Seed Bank aims to conserve seeds from plant species around the world and help prevent their extinction. Its secure underground vaults are designed to withstand major impacts, and its collection includes seeds representing about 10% of the world’s known plant species.

Seeds can survive for long periods by entering a dormant stage. They contain stored food and have a protective outer covering. To prepare seeds for storage, the bank cleans and dries them, seals them in jars, and keeps them at −20°C. Scientists do not yet know exactly how long seeds can last under these conditions.

Seed samples are periodically removed and germinated to test their viability. If most of the seeds grow, the batch can remain in storage for another decade. If a sample fails—for example, because fungus affects germination—scientists investigate the cause and how to prevent it.

The video also cites a report that date-palm seeds found at Herod the Great’s palace at Masada germinated after roughly 2,000 years, suggesting that some seeds may survive for millennia.

The seed bank is both a long-term safeguard and a practical conservation resource: stored seeds can help increase populations of plants close to extinction. The video warns that biodiversity recovery after past mass extinctions took millions of years, underscoring the importance of preserving species now.

Researchers and Sources

• Dr. Wolfgang Stuppy — Identified in the subtitles as the seed bank’s chief morphologist; the spelling of his surname is unclear in the auto-generated transcript.
• An Israeli report — Cited for the claim about ancient date-palm seeds found at Masada.
• David Attenborough — Presenter and narrator.