480mm Seedling Tray Deep

What is the 480mm Seedling Tray Deep used for?

This deep propagation tray is ideal for starting seeds, rooting larger or slower cuttings, and holding plants longer without root binding. It's also great for “community sowing” rows of flowers or veg before potting up.

Why choose the deep tray over a shallow one?

The extra depth holds more propagation mix, improving moisture stability and giving roots more room to grow. It’s especially useful for slow-rooting cuttings, large-leaf ornamentals, or growers wanting to reduce pot-ups early on.

What are the dimensions of the 480mm Seedling Tray Deep?

It measures 480mm long × 300mm wide × 80mm high. While similar to a 1020 tray, check dimensions before pairing with inserts, humidity domes, or shelves, as fit can vary slightly between brands.

What kind of media works best in the tray?

For seeds, use a light, free-draining seed-raising mix. For cuttings, go with an airy blend like perlite-heavy propagation mix. Coco, peat, or soil all work—just match your watering style to drainage type.

Can I bottom-water using this tray?

If you have a solid (no-hole) version, yes—it works well as a bottom-watering tray. If your tray has drainage holes, use it for carry/runoff instead. You can also drill holes if needed for free-drain setups.

Can I use this tray with heat mats or humidity domes?

Yes—it's compatible with heat mats and domes, provided the dome footprint matches. Just monitor moisture levels closely when using bottom heat to avoid drying out too fast.

Is the 480mm Seedling Tray Deep reusable?

Yes—it’s built for multiple grow cycles. Clean and dry between runs to prevent mould or pests. Stackable for easy storage when not in use.

Is the tray sturdy enough to carry when full?

It’s designed for handling, but a fully loaded tray can get heavy. Always support from underneath with two hands to prevent flexing or spills, especially when filled with wet media.

Can algae or fungus gnats become an issue?

If water sits too long or media stays soggy, yes. Use light, even watering, allow surfaces to dry between sessions, and keep good airflow. Bottom-watering helps reduce surface dampness.

Can I use this tray for hydroponic propagation?

Yes—it’s often used in hydro workflows as a carry tray, runoff catch tray, or base for holding plugs or inserts. Works equally well with cuttings or seed starts in soilless media.

Is this tray suitable for microgreens or wheatgrass?

You can use it, but for microgreens, a shallow tray is usually more efficient. For wheatgrass or fodder, the extra depth can help maintain moisture and reduce dry-outs.

Can I harden off seedlings in this tray outdoors?

Yes—it’s great for batching seedlings when moving them in and out for hardening. Just ease them into full sun and wind gradually to avoid transplant shock.

Is this tray food-safe for edible crops?

Not all nursery trays are food-safe certified. If you're growing edible microgreens or sprouts, use a food-safe liner or choose trays specifically marketed as food-safe.

What’s the most common mistake with deep trays?

Overwatering. Deeper trays hold more moisture, so it’s easy to saturate media too often. Stick to light watering, improve airflow, and monitor media surface before watering again.

What’s a simple way to use this tray effectively?

Use it under propagation cells or as a bottom-water tray. Keep it clean, ensure airflow, and match your media depth to plant stage—don’t overfill if you don’t need to.