12 Cell Adjustable Humidity Dome & Propagation Tray (Small)

What can I grow in the 12 Cell Adjustable Humidity Dome & Propagation Tray?

It's great for starting herbs, vegetables, flowers, microgreens, and even soft cuttings. Compact and forgiving, it’s perfect for beginners, kids, and year-round indoor use with the right light and care.

What comes with the 12 Cell Propagation Tray kit?

The kit includes a sturdy base tray, a 12-cell insert, and a clear dome lid with an adjustable vent. Seeds, soil, and grow lights are not included—you’ll need to supply those based on your project.

Can I use the tray indoors or outdoors?

Yes—indoors is ideal (windowsills, under grow lights). Outdoors, protect it from heavy rain, strong sun, and wind. The dome can overheat in direct sun, so monitor conditions closely.

Is the 12 Cell Propagation Tray reusable?

Yes—it’s made from durable plastic. Clean thoroughly between uses with warm soapy water or a mild disinfectant, and let it dry fully before replanting. Fresh seed mix is always recommended.

What soil or media works best?

Use a light, sterile seed-raising mix or buffered coco coir. Peat pellets and plugs can work too, as long as they fit the cells and don’t dry out too quickly on top.

How should I water the tray?

Bottom watering is best—add water to the base and let it wick up. Avoid letting water pool long-term. Mist gently from the top early on, but don’t oversaturate or you’ll invite mold.

How do I use the dome and vent?

Keep the vent mostly closed for germination, then open it gradually as sprouts appear to increase airflow. Remove the dome fully a few days after sprouting to prevent damping off and leggy growth.

Do I need heat or grow lights?

A heat mat helps warm-loving seeds sprout faster. Most indoor windows don’t provide enough light—use grow lights to avoid weak, leggy seedlings. A small fan also helps build stem strength.

How many seeds should I plant per cell?

Generally 1–2 per cell. If both germinate, thin to the strongest. Plant at 2–3× seed thickness unless otherwise noted. Some seeds need light to germinate, so always check your seed packet.

Why is there mold or fuzzy white stuff in my tray?

That’s usually due to excess moisture, poor airflow, or leaving the dome sealed too long. Open vents, use a fan, and let the surface dry slightly between waterings to prevent issues like damping off.

When should I fertilise my seedlings?

Once true leaves appear (not the first pair), start feeding with a weak liquid fertiliser. Yellowing can mean lack of nutrients, overwatering, or insufficient light—adjust accordingly.

When should I transplant seedlings?

Transplant once they have 1–2 sets of true leaves and roots hold the plug together. Don’t wait until they’re root bound or drying out fast. Harden them off before planting outside.

Can I grow multiple plant types in one tray?

Yes—just label each cell and group by similar germination speeds. Avoid mixing sun-loving plants with slow, cool-season types if you're keeping them in the same dome environment.

What’s the most common mistake with this tray?

Leaving the dome sealed too long and overwatering—this leads to mold, leggy seedlings, and weak roots. Always adjust airflow as soon as sprouts emerge and don’t treat it like a closed system.

Can I Click & Collect the 12 Cell Propagation Tray from Bellambi?

Yes—Click & Collect is available at Bellambi and usually ready within 24 hours. Check the product page for current stock before heading in.