Greenhouse Seedling Tray

the greenhouse seedling tray | strong starts for your hydroponic garden

Give your seeds the warm, humid start they love. This compact greenhouse creates the high-humidity conditions seedlings need to germinate quickly and grow strong, so you can get a new batch going without tying up space in your main hydroponic garden.

It's a simple way to raise sturdy, well-rooted seedlings that are ready to transplant when you are.

New to seedlings? Read what rockwool is and our guide to propagating your plants. Stock up on rockwool cubes and seeds.

raise 18 seedlings at once

The tray fits 25 x 25 x 40mm Grodan rockwool cubes and slots straight into the gathera ecosystem, so you can match your seedlings to the sun basin, heirloom tower, heirloom garden or sun shelf with no fuss.

compact, so it saves space

At just 190 x 120 x 40mm, it lets you start seeds off to one side and keep your main hydroponic system free for mature plants.

a clear lid you can watch through

The transparent dome lets you keep an eye on your seedlings without disturbing them, and it sits inside the basin so condensation drips back into the tray and keeps moisture steady.

durable and easy to clean

It's made from food-safe PET with smooth surfaces and rounded inside corners, so there's nowhere for grime to hide and it's quick to rinse out. It's also recyclable through most kerbside bins.

healthy roots that transplant well

The design suspends the rockwool cubes above the water, so roots grow down into the nutrient-rich water below. You get long, healthy roots that settle into your main system far more easily.

• Materialfood-safe PET (recyclable)
• Dimensions190 x 120 x 40mm

Includes:

• 1 x growing basin
• 1 x germination tray
• 1 x humidity dome
• 1 x instruction manual
• optional: can be bought with fitting cubes

The set comes with instructions, but if you'd rather dive straight in, here's how to get started.

1. Place the germination tray inside the growing basin and make sure it's sitting securely.
2. Soak your rockwool cubes in water until they're fully saturated, which gives your seeds the moisture they need to sprout.
3. Pop each soaked cube into a slot in the tray, add 2 to 5 seeds per cube depending on what you're growing, then cover everything with the humidity dome.
4. Keep the dome on until your seeds have sprouted and grown their first true leaves, usually within 1 to 2 weeks. Once the seedlings are established, take the dome off so air can circulate and growth strengthens.
5. You can add nutrients from the start at the ratios on your nutrient bottle for a growth boost, though this can encourage algae. A safer approach is to wait until roots show at the bottom of the cubes before adding nutrients.
6. Once your seedlings have strong roots, they're ready to move into your hydroponic system or a soil garden. Gently push them up from below the tray, or ease them out by the stem.

Follow those steps and you'll have healthy seedlings ready to grow in no time. For the best results, it's worth checking the specific germination needs of whatever you're sowing.