Corm Propagation Rack + Humidity Base

A modular corm propagation system designed to create a structured, high-humidity environment for both propagation and early plant growth.

This setup is designed to fit inside clear acrylic display boxes; https://amzn.to/4mxhKBJ (approx. 33.2 x 23 x 21cm) and holds up to 24 dome-style corm cups while incorporating an optional humidity base layer.

The system keeps propagation organised, elevated, and easy to monitor, while allowing a seamless transition from propagation to early growth once sprouted.

🔧 System Overview

This design is split into modular components so you can print what you need:

1. CormPod Holder
• 3 Tiered rack holding up to 24 corm cups
• Keeps cups stable, organised, and elevated
• Improves airflow and access

2. Humidity Base
• Deep-fill tray designed for passive humidity
• Sits beneath the holder inside an acrylic box
• Can be used independently

3. Full System
• Combines holder + humidity base
• Creates a complete propagation environment

💧 Humidity Base Use

The base is designed to support passive humidity setups using:

• Lava rock
• Pumice
• Leca (clay pebbles)
• Perlite

• Moss
• Water reservoir setups

Simply add water to maintain humidity levels within the enclosure.

Patterned lid can be used to:
• Improve airflow
• Reduce condensation pooling
• Help stabilise humidity

🌱 Use Case

Designed to support the full early lifecycle:

Propagation Stage
• Use with dome cups for high humidity corm activation

Growth Stage
• Remove domes once sprouted
• Continue growing within the same setup

No need to relocate plants between stages.

🖨️ Print Information

Recommended Material:
• PETG (recommended for humidity resistance) I used Bambu Lab PEGT Translucent
• PLA can be used but may degrade over time in high humidity

Print Notes:
• Designed to print with no supports
• Infill density and pattern can be customised in your slicer depending on strength vs material preference

📏 Compatibility

Designed for acrylic display boxes with approx. internal dimensions:
• Base: 33 x 21 cm
• Height: ~23 cm

Sizing may vary slightly depending on brand; I use https://amzn.to/4mxhKBJ **Amazon Affiliate Links. I may earn a commission.

💬 Community

Would love to see your setups — feel free to share your builds and tag your prints 🌿