BuildASoil Extend-A-Dome: Extendable Grow Dome

Struggling with short humidity domes that crush your plants? Whether you're starting seeds, propagating clones, or growing delicate seedlings, the BuildASoil Extend-A-Dome gives you the room and control you need—without the hassle.

Extendable, Stackable, Built to Last The BuildASoil Extend-A-Dome is a heavy-duty, oversized extendable humidity dome designed to grow with your plants.

It includes a durable tray, one height extender, and a vented lid with four locking clips for a secure fit.

Need more height? Easily add extra extenders for ultimate customization—perfect for bigger clones or taller seedlings.

Base Dome: 24"x15"x8" Includes Bottom Tray, 1 Extender and Lid Base Dome + 1 Extender: 24"x15"x12" Base Dome + 2 Extenders: 24"x15"x16" (Most Popular) Base Dome + 3 Extenders: 24"x15"x20" Key Features & Benefits • Extendable & Stackable – Comes with one extender, but you can add more for tall clones and vigorous seedlings.

Each Extender adds 4" of Height • Perfect Size: You can easily fit a standard flat tray inside the sturdy green bottom tray.

This makes it so versatile.

Large 24"x15"x3.5" Bottom Tray • Heavy-Duty Construction – The sturdy polypropylene tray holds up to 60 germination trays or six large pots without flexing. • Ventilation Control – Two oversized vents allow you to fine-tune humidity and airflow for optimal growth. • Grow Light Compatible – The UV-resistant, crystal-clear lid won’t degrade under grow lights or block essential light. • Indoor & Outdoor Use – Use indoors for seed starting or outdoors for early and late-season protection. • Compact Storage – Extensions easily disassemble when not in use, making storage simple.

How to Customize Your Dome The BuildASoil Extend-A-Dome includes a tray, one height extender, and a vented lid with four locking clips.

Need more space? Simply click the add-on button at checkout to purchase additional extenders.

Adding two extra extenders is enough for most tall clones, but if you want even more room—it’s totally up to you! Instructions for Use: • Place your seedlings, clones, or germination trays in the heavy-duty tray. • Cover with the Extend-A-Dome and adjust the vents for optimal humidity. • Need more height? Easily stack additional extenders as your plants grow. • Gradually open vents to harden off plants before transplanting. • Transplant into larger containers and harden off in the same tray! Whether you're cloning, germinating, or growing strong seedlings, the BuildASoil Extend-A-Dome gives your plants the best start possible—without crushing, crowding, or makeshift fixes.

Upgrade your grow setup today! Weight: 2.00 lbs.

Dimensions: 8 x 5 x 2 in.