root rot on Agave
Quick answer
If your Agave has root rot, the most likely cause is: Agave roots are highly susceptible to root rot when sitting in waterlogged soil, which deprives roots of oxygen and promotes Pythium and Phytophthora. In native habitats, agaves grow on slopes and rocky terrain with fast drainage.
Start here:
- 1. Test drainage by digging a 1-gallon hole and filling it with water — if it takes more than an hour to drain, soil is clay and agaves will rot
- 2. Plant agaves on slopes or mounds to ensure water runs away from roots, not pools around them
Why Agave gets root rot
Agave spp.
Agave roots are highly susceptible to root rot when sitting in waterlogged soil, which deprives roots of oxygen and promotes Pythium and Phytophthora. In native habitats, agaves grow on slopes and rocky terrain with fast drainage.
How to reverse root rot on Agave
- 1
Test drainage by digging a 1-gallon hole and filling it with water — if it takes more than an hour to drain, soil is clay and agaves will rot
- 2
Plant agaves on slopes or mounds to ensure water runs away from roots, not pools around them
- 3
Amend clay soil with equal parts pumice, coarse sand, and compost — or replace entirely with cactus mix
- 4
Water agaves deeply but infrequently, allowing soil to dry completely between waterings
Keep root rot off this Agave
Never plant agaves in clay soil or low-lying areas that collect water. Amend clay soil with pumice and coarse sand, or use raised beds and slopes to ensure water runs off quickly.