Suberization is the process where plant cells develop a thin, waxy protective layer that makes them more resistant to water movement.
What it does
Suberization turns active tissue into protective tissue. It slows how easily water, oxygen, and nutrients move through that part of the plant.
Where you see it
- Roots: Older root sections become less absorbent over time
- Wounds: Cuts seal themselves to prevent rot and water loss
- Stems and bark: Corky tissue forms through heavy suberization
Why it matters for houseplants
- Suberized roots absorb far less than young root tips
- Constantly wet soil can speed up suberization
- Healthy growth depends on producing new roots, not just keeping old ones
See Also
