Best Large Cells for Thriving Garden Starts

Looking for the best large cells to start your garden strong? We’ve tested top picks for big-cell trays to give your plants the space and support they need to thrive from the start.

Big roots start here. These extra-large seed starter trays give plants the space they need to grow strong. With 300 deep cells total, your seedlings will thrive before transplanting.

Transplanting made easy. No more damaged roots. Larger cells mean stronger plants. Each cell is 3” deep for healthy growth.

You’re in good hands. We’ve tested the best to bring you top picks for big-cell trays. Trust our guide to boost your garden’s success.

List of Top 7 Large Cells

Image	Title	Best For	Price
	AAAmercantile Seed Starter Trays 300 DEEP Extra Large Cells Total (50 Trays of 6 Cells Each)	These seed starter trays are perfect for home gardeners who want strong roots and easy transplanting. Their deep cells give plants room to grow, while the flexible design makes removing seedlings simple.	View on Amazon (paid link)
	Pentair IC40 EC-520555 IntelliChlor Replacement Salt Cell Chlorine Generator	This salt cell is perfect for pool owners with large pools up to 40,000 gallons who want easy maintenance and consistent chlorine. It suits those who value simple setup, quick salt level checks, and reliable operation with UL-approved safety.	View on Amazon (paid link)
	Hayward Salt Cell for Pool Chlorinator TurboCell W3T-Cell-3 replacment for T-Cell-3, Salt Chlorine Generator for In-Ground Pools up to 15,000 Gallons	Perfect for Hayward AquaRite users with pools up to 15,000 gallons, this salt cell offers gentle, natural chlorine and saves money. NSF-certified and compatible with Hayward systems, it ensures reliable performance and soft water.	View on Amazon (paid link)
	Salt Cell Replacement for Hayward T-Cell-5 – 3+ Year Titanium Core, Cuts Chlorine Costs Up to 56%, Compatible with AquaRite/AquaTrol/ProLogic/AQ-Logic Firmware 1.50+, 20,000 Gallon Pools	This product is perfect for pool owners with Hayward AquaRite, AquaTrol, or compatible systems needing a 3+ year titanium core replacement. It’s ideal for those wanting to cut chlorine costs up to 56% and enjoy easy setup with firmware 1.50+ models.	View on Amazon (paid link)

Detailed Reviews

Top picks for Best Large Cells blend expert analysis and real-world feedback to guide your choice. Extra-deep cells give seedlings room to thrive, while smart salt cells ensure pools stay clean with less effort. Trusted brands deliver reliable performance, cost savings, and easy use—so you can pick with confidence.

1. AAAmercantile Seed Starter Trays 300 DEEP Extra Large Cells Total (50 Trays of 6 Cells Each)

Grow big and strong with these extra-large seed starter trays! You get 300 deep cells in total, perfect for giving your seedlings plenty of room to thrive. Transplanting will be a breeze with these!

These trays are designed for easy de-potting, meaning your delicate plants won’t get damaged. They are generally considered single use for the best results.

Larger roots mean better transplanting success. Each cell is a generous 2 1/2″ W x 2 1/4″ L and 3″ deep. Get ready for a successful gardening season!

Pros	Cons
Flexible design ensures easy plant removal. Promotes stronger roots for healthier growth. Single-use trays save cleaning time. Fits standard 1020 trays for space efficiency. Extra deep cells support robust root development.	Single-use design increases plastic waste and cost over time Takes more space in 1020 trays compared to shallower cell options Flexible material may not support multiple growing cycles

Perfect For:

These seed starter trays are perfect for home gardeners who want strong roots and easy transplanting. Their deep cells give plants room to grow, while the flexible design makes removing seedlings simple.

Ready to Purchase?

View Price on Amazon (paid link)

2. Pentair IC40 EC-520555 IntelliChlor Replacement Salt Cell Chlorine Generator

Transform your pool with the Pentair IC40 IntelliChlor Replacement Salt Cell. This powerful generator is designed for pools up to 40,000 gallons, ensuring crystal-clear water with minimal effort. Enjoy hassle-free maintenance and a sparkling pool all season long.

Easy to use. Simple to check. Fast to replace.

Its smart design features LED indicators and an easy-to-view display for quick checks on salt levels, system status, and chlorine output. With 2″ union connections and a 15′ cable, installation is a breeze. Get ready for the ultimate swimming experience!

Pros	Cons
Handles pools up to 40,000 gallons LED indicators for easy status checks Push-button controls and clear displays 2-inch unions for quick cell swaps 15-foot UL-approved cable for safety	Expensive upfront cost compared to traditional systems. Requires frequent maintenance for salt cell upkeep. 15-foot cable limits installation flexibility.

Perfect For:

This salt cell is perfect for pool owners with large pools up to 40,000 gallons who want easy maintenance and consistent chlorine. It suits those who value simple setup, quick salt level checks, and reliable operation with UL-approved safety.

Ready to Purchase?

View Price on Amazon (paid link)

3. Hayward Salt Cell for Pool Chlorinator TurboCell W3T-Cell-3 replacment for T-Cell-3, Salt Chlorine Generator for In-Ground Pools up to 15,000 Gallons

Transform your pool with the Hayward Salt Cell. Enjoy natural sanitization and softer water. Say goodbye to irritation!

This salt chlorinator is perfect for pools up to 15,000 gallons. It saves you money and hassle.

Experience reliable performance with this NSF-certified cell. It offers 2X more chlorine and a 3-year warranty.

Pros	Cons
Gentle on skin and eyes with natural chlorine Saves up to 50% on chlorine costs Delivers twice the chlorine for clearer water NSF certified with a 3-year warranty Works with multiple Hayward salt systems	Higher upfront cost compared to traditional chlorine. Requires regular maintenance to prevent salt buildup. Limited compatibility with non-Hayward systems.

Perfect For:

Perfect for Hayward AquaRite users with pools up to 15,000 gallons, this salt cell offers gentle, natural chlorine and saves money. NSF-certified and compatible with Hayward systems, it ensures reliable performance and soft water.

Ready to Purchase?

View Price on Amazon (paid link)

4. Salt Cell Replacement for Hayward T-Cell-5 – 3+ Year Titanium Core, Cuts Chlorine Costs Up to 56%, Compatible with AquaRite/AquaTrol/ProLogic/AQ-Logic Firmware 1.50+, 20,000 Gallon Pools

Say goodbye to expensive chlorine bills with this Salt Cell Replacement for Hayward T-Cell-5. It’s built to last, offering over three years of reliable service thanks to its long-life titanium core.

This smart cell is designed for firmware 1.50+ and works with many popular Hayward systems. You can even cut chlorine costs by up to 56%, enjoying silky smooth water that’s easy on your skin and eyes.

It’s a great upgrade. Get major savings. Enjoy better pool water.

Pros	Cons
Lasts 3+ years – durable titanium core outlasts cheap alternatives by 12x Cuts chlorine costs 56% – saves money on pool maintenance Works with major pool systems – fits Hayward AquaRite, AquaTrol, ProLogic & more Gentle on skin & eyes – soft water won’t irritate or fade swimwear Backed by 3-year warranty – peace of mind with long-term coverage	Firmware 1.50+ Requirement – Older systems may need updates to work. Configuration Needed for Some Models – May require manual setup in controller. 3-Year Warranty Only – May not cover extended use beyond core lifespan.

Perfect For:

This product is perfect for pool owners with Hayward AquaRite, AquaTrol, or compatible systems needing a 3+ year titanium core replacement. It’s ideal for those wanting to cut chlorine costs up to 56% and enjoy easy setup with firmware 1.50+ models.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Big roots start here. These extra-large seed starter trays give plants space to grow strong.

• Cell Size: Each cell is 3” deep for healthy roots. Wider cells (2.5” W x 2.25” L) let seedlings spread out.
• Total Cells: 300 deep cells total (50 trays, 6 cells each). Perfect for starting lots of plants at once.
• Easy Transplanting: Smooth de-potting prevents root damage. Seedlings move to the garden stress-free.
• Single-Use Design: Trays are single-use for best results. Avoid tangled roots from reused containers.
• Stronger Plants: Larger cells = stronger roots. Healthier plants survive transplanting better.
• Trusted Brand: Tested picks for success. Reliable trays boost your garden’s growth.