Thanks Geetha for answer request,

The water hyacinth (Eichhornia crassipes) reproduces both asexually and sexually.

It produces a massive amount of seeds. Just one single plant can produce up to 5,000 seeds. These seeds remain ready for germination for 15-20 years and can live atop the hyacinth mats (layers of hyacinth tissue on the surface of water) or underwater until they germinate.

So the life span is generally 2–3 months but it differs from place to place and nutrition to nutrition.

Birds, wind, and waves carry seeds and even fully grown plants into new areas, where it generates a mat of its own.

Suggested reading- Common water hyacinth