Despite concerns that the volcanic ash, which blanketed 99% of the country, would make soils too toxic to grow crops, "food production has resumed with little impacts," said Siosiua Halavatu, a soil scientist speaking on behalf of the Tongan government.

Source: https://gazette.com/news/us-world/one-year-after-volcanic-blast-many-of-tongas-reefs-lay-silent/article_92896161-c342-55e0-b206-08e25725593a.html