Hydrofarm Jump Start Smart Float Grow Tray - 55 Cell - 11in x 21in x 2.5in

Hydrofarm Jump Start Smart Float Grow Tray - 55 Cell - Complete Propagation System with Plugs

The Hydrofarm Jump Start Smart Float Grow Tray is a complete 55-cell propagation system that combines a durable tray, a floating cell insert, and 55 Quick Start plugs in one ready-to-use kit. The floating insert design is the key differentiator - by suspending plugs above the water surface, it maintains an ideal air-to-water ratio at the base of each plug, encouraging strong, consistent root development without the overwatering risk of fully submerged systems. Compatible with Hydrofarm humidity domes to create a fully enclosed mini greenhouse environment for optimal germination and early growth. Plug refills are available separately, allowing the tray to be reused for unlimited propagation batches. System dimensions: 11in W x 21in L x 2.5in H. Includes: one 55-cell insert, one 11in x 21in tray, and 55 Quick Start plugs.

Key Features & Benefits

• Floating Insert Design: The floating cell insert suspends plugs above the water surface, maintaining the air-to-water ratio that drives healthy root initiation without the risk of oversaturation.
• Complete Kit - Ready to Use: Tray, insert, and 55 Quick Start plugs are all included - seed or cutting propagation can begin immediately with no additional components required.
• Dome Compatible: Sized and designed for use with Hydrofarm humidity domes to create a fully enclosed germination environment that retains heat and humidity during early propagation.
• Reusable System: The tray and insert are designed for multiple crop cycles - restock with refill plugs (sold separately) to keep propagating batch after batch without replacing the tray.
• 55-Cell Capacity: 55 cells per tray supports meaningful batch sizes for home growers and hobbyists propagating multiple varieties simultaneously.

Who Should Use This

The Smart Float Grow Tray is well-suited for home growers, hobbyists, and small-scale producers who want an all-in-one propagation system that is easy to set up and maintain. The floating insert design makes it particularly useful for growers who have struggled with overwatering in traditional wicking or flood-based propagation trays. Works for seed germination and vegetative cutting propagation for vegetables, herbs, flowers, and other specialty crops.

Compatibility

The Hydrofarm Smart Float Grow Tray is compatible with Hydrofarm humidity domes sized for standard propagation tray footprints. After rooting, plugs transplant into soil, soilless potting mix, coco, expanded clay, or any major hydroponic growing system. Replacement plugs (sold separately as Smart Float Refill Plugs, 55ct) allow the tray and insert to be reused indefinitely. For optimal germination, pair with a Hydrofarm Jump Start Seedling Heat Mat placed under the tray.

Frequently Asked Questions

What is included in the Smart Float Grow Tray kit?

The kit includes one 55-cell floating insert, one 11in x 21in tray, and 55 Quick Start plugs - everything needed to start a full 55-plant propagation batch immediately.

How does the floating insert work?

The floating insert suspends plug cells just above the water surface in the tray. This keeps the base of each plug in contact with moisture through capillary action while the top portion of the plug remains aerated - providing the air-to-water balance roots need to develop quickly and healthily.

Can I reuse the tray after the first batch?

Yes. After transplanting, clean the tray and insert and restock with Hydrofarm Smart Float Refill Plugs (55ct, sold separately) for additional propagation cycles.

What humidity domes fit this tray?

The Smart Float Grow Tray is designed for use with Hydrofarm humidity domes sized for standard propagation tray footprints. Check Hydrofarm dome compatibility specifications to confirm fit with your preferred dome model.