DIY Cedar Seedling Tray: Solo Cup Organizer Build Plans

Stop juggling plastic cups and spilling soil. These DIY build plans show you how to construct a custom carrying tray designed to secure 15 standard 16oz Solo cups, making it easy to move seedlings from grow lights to the greenhouse. This ultra-efficient project is built entirely from a single cedar fence picket, costing less than $5.

Project Attributes & Specifications

• Secure Transport Design: These instructions include a specialized cup-holder template that locks each cup in place, preventing tipping or spilling even if the tray is bumped during transport.

• Bottom-Watering Compatible: The cup template allows you to pour water directly into the tray insert so seedlings can soak it up from the bottom, promoting healthy root growth and preventing surface mold.

• Ultra-Efficient Material Use: Engineered to be constructed from a single, inexpensive cedar fence picket—making it an ideal "scrap wood" or budget-friendly weekend project.

• Lightweight & Portable: Built from lightweight cedar fencing, the tray is easy to carry even when fully loaded with wet soil and plants.

• Finished Dimensions: Once assembled, the tray measures 22.5" Long x 12.25" Wide x 3.5" High, with a capacity for 15 cups.

• Beginner-Friendly Build: Requires only basic woodworking tools like a saw, drill, and hole saw.

What These Detailed Build Plans Provide

This instructional guide turns a single board into a high-performance gardening tool with professional precision.

• Precision Cup Holder Template: Includes exact measurements for a removable insert that perfectly spaces and secures your seedling cups.

• Optimized Cut List: Shows you exactly how to break down a single fence picket to eliminate waste and maximize your material.

• Step-by-Step Construction Guide: Clear, logical instructions guide you from the first cut to the final assembly of the base and supports.

• Practical Gardening Tips: Advice on using the tray for efficient bottom-watering and how to protect the wood for multiple seasons of use.

Whether you are starting an indoor nursery or hardening off seedlings for spring, these build plans provide the instructions to create a durable, organized, and cost-effective garden carrying system.

All Mt Liberty Designs plans are provided for educational and DIY reference purposes. It is the buyer's responsibility to verify that any structures built from these plans comply with local zoning ordinances, HOA rules, and building codes. Always use proper safety gear and exercise caution when operating power tools.