Quick answer: Alocasia corms usually rot before sprouting when they sit in saturated media with too little airflow. Keep the corm barely moist, warm, and humid, but never buried in wet substrate.
The rot pattern
- Soft or translucent base
- Sour smell inside the container
- Brown mush where the growth point should be
- No root nubs after 2-3 weeks in warm conditions
The safe sprouting setup
- Use damp, not wet, sphagnum, perlite, or fluval-style media
- Leave the top of the corm exposed
- Vent the container daily for fresh oxygen
- Keep warmth steady around 23-26 C
- Remove condensation if drops are running down the walls
Sarah's grower note
- A corm wants humidity around it, not water sitting on it.
- If you can squeeze water out of the medium, it is too wet.
- Firm corms can take weeks. Soft corms rarely recover.
When to restart
- Trim only dry husk, not living tissue
- Discard fully soft corms
- Restart firm corms in fresh media
- Label the date so you do not over-check them
Next steps
- Change one variable at a time.
- Take a photo before and after each care adjustment.
- Use the Wild At Home care guides when you need a second check.
Helpful links: Plant Care Guides, Rare Plants, Cabinet Growing, Local Pickup, and About Wild At Home.
FAQ
Should Alocasia corms be buried?
No. Keep the growth point exposed or only lightly nestled so it can breathe.
Do corms need light before sprouting?
Bright indirect light helps warmth and orientation, but moisture control matters more.
Can a soft Alocasia corm recover?
A slightly soft outer husk may be fine. A mushy center usually means the corm is lost.