Ask Mr. Smarty Plants

That's interesting. How in the world did a Blue Agave get to Kenya? With all of the international restrictions on the movement of plant material, we're just surprised it made it there. The Lady Bird Johnson Wildflower Center, home of Mr. Smarty Plants, is dedicated to the growth, protection and propagation of plants native not only to North America (excluding Mexico) but to the area in North America in which they are being grown.

This article from In Search of the Blue Agave will give you far more information than we can. When reading that article, scroll down to "Diseases and Pests of the Blue Agave" where several diseases, including fusarium wilt, are described that could be the source of the problem. Also, if your agave has flowered in the last year, it is dying because it consumed a great deal of energy to flower and, like all agaves, then dies. Since it is native to neither North America nor Kenya, but rather to Mexico, we really have no idea what environmental problems there might be.