This Mr. Pen seed starter trays review looks at a reusable five-tray set for gardeners who want open growing and work space for seeds, sprouts, and microgreens.
Mr. Pen Seed Trays Review Summary
The quick verdict
1,000+ ratings
Read Amazon ReviewsMr. Pen Seed Starter Trays
A reusable five-tray option for gardeners who want flexible open space for seed starting, sprouts, microgreens, potting, and soil mixing.
- Five seed starting trays in the package.
- Each tray measures 17 X 10 X 2.4 inches.
- Durable plastic construction is intended for repeated use.
- Raised edges help contain soil, fertilizer, and water.
Pros
- Five trays provide reusable capacity for several gardening tasks.
- Open tray space accommodates seeds, sprouts, microgreens, and other plants.
Consider before buying
- The open one-piece design does not provide divided cells, so plan another way to separate individual seedlings if you need organized starts.
- The trays are intended to contain soil, fertilizer, and water, so handle them carefully when filled to avoid spills.
Read the full review summary
The appeal is flexibility: the five trays suit seed germination, sprouts, microgreens, potting, and mixing soil, so they can serve as general gardening work surfaces as well as growing trays.
Their reusable plastic construction and indoor or outdoor use make them a practical fit for gardeners who want to reuse the same open trays across different tasks.
These are open trays rather than a divided cell kit.
That suits gardeners who value room for varied plant work and already have any heat mat, humidity dome, or hydroponic system they plan to use; the trays are designed to work with those accessories.
Raised edges help contain soil, fertilizer, and water during use.
The buying factors
Mr. Pen Seed Trays Scorecard
Editorial scores reflect listed features and buyer fit; they are not laboratory measurements or customer ratings.
Growing-task versatility
The trays cover germination, sprouts, microgreens, potting, soil mixing, and general plant growing, giving them uses beyond starting seeds.
Reuse potential
Durable plastic construction and repeated use suit gardeners seeking a reusable tray set.
Accessory compatibility
The tray is designed to work with heat mats, humidity domes, and hydroponics systems, leaving gardeners free to pair it with those tools.
Work-area containment
Raised edges and the containment design help keep soil, fertilizer, and water within the tray during gardening tasks.
Everyday handling
The lightweight trays are designed to be easy to clean, useful when rotating between planting and soil-mixing tasks.
Cell-based seed organization
The one-piece tray design favors open growing space; gardeners needing separated seedlings should consider how they will organize individual starts.
Key Features and Specifications of Mr. Pen Seed Trays
- Five seed starting trays in the package.
- Each tray measures 17 X 10 X 2.4 inches.
- Durable plastic construction is intended for repeated use.
- Raised edges help contain soil, fertilizer, and water.
- Suitable for germinating seeds, growing sprouts and microgreens, potting plants, and mixing soil.
- Works with heat mats, humidity domes, and hydroponics systems.
Pros and Cons of Mr. Pen Seed Trays
Pros
- Five trays provide reusable capacity for several gardening tasks.
- Open tray space accommodates seeds, sprouts, microgreens, and other plants.
- Raised edges help contain soil, fertilizer, and water.
- Lightweight trays are designed to be easy to clean.
Consider before buying
- The open one-piece design does not provide divided cells, so plan another way to separate individual seedlings if you need organized starts.
- The trays are intended to contain soil, fertilizer, and water, so handle them carefully when filled to avoid spills.
- For a compact growing area, check that the 17 X 10 inch footprint fits your shelf or work surface.
Who Should Buy Mr. Pen Seed Trays?
Good fit
Choose these trays if you want a reusable set for seed starting and broader plant work, including sprouts, microgreens, potting, and mixing soil. Five pieces make it practical to keep separate trays for different tasks or planting batches.
They fit gardeners who prefer open tray space and want to pair trays with their own heat mats, humidity domes, or hydroponics systems. Their reusable plastic build is suited to repeated indoor or outdoor gardening use.
Who should skip it
Look elsewhere if your priority is a ready-to-use cell system that separates seedlings and manages humidity with included domes. These trays provide open growing space and are not a divided-cell kit.
If shelf space is limited, measure first: each tray has a 17 X 10 inch footprint.
Mr. Pen Seed Trays: Open Space for Flexible Seed Starting
Open trays for varied gardening tasks
The broad use case is a key strength. These trays are intended for germination, sprouts, and microgreens, but also for potting and soil mixing.
That flexibility makes the set useful beyond a single seed-starting cycle, especially for gardeners who value multipurpose equipment.
Reuse and cleanup
Durable plastic is intended for repeated use, while the one-piece design and easy-clean construction support simple turnaround between tasks.
Lightweight handling may also help when moving trays around a planting area, though filled trays should be handled with care.
Containment and accessories
Raised edges help keep a work area neater by containing soil, fertilizer, and water.
Compatibility with heat mats, humidity domes, and hydroponics systems makes the trays adaptable to an existing setup, while leaving the gardener to choose those accessories separately.
Fit the dimensions to your space
At 17 X 10 X 2.4 inches, each tray needs a suitable shelf, bench, or work surface. Check the available footprint before buying, particularly if you plan to use several trays at once.
Alternatives to Mr. Pen Seed Trays
Plant Germination Trays alternative
100+ ratings
Read Amazon ReviewsLetPot Smart Seed Starter with Humidity Dome
Prefer Mr. Pen for reusable open trays that can shift between growing and soil work; choose LetPot if you want cell-based starts with integrated lighting, heating, monitoring, and app controls.
- The LetPot combines a 40-cell tray with a full-spectrum grow light, smart heating base, soil EC and temperature monitoring, humidity dome, and app control for indoor seed starting.
- The Mr. Pen set provides five reusable open trays for germination, sprouts, microgreens, potting, and soil mixing.
Plant Germination Trays alternative
200+ ratings
Read Amazon ReviewsMr. Pen Seed Starter Tray Kits
Choose the open-tray set for flexible plant work and reuse; choose the cell kit if separating multiple varieties under adjustable-vent domes and using included sowing tools better matches your starting routine.
- This Mr. Pen kit has 10 sets and 150 cells, with adjustable-vent domes, cell drainage, and sowing and seedling-lifting tools for separated starts.
- Mr. Pen's open trays support germination, sprouts, microgreens, potting, and mixing soil, with five trays in the pack.
Plant Germination Trays alternative
100+ ratings
Read Amazon ReviewsSeedfactor Seed Starter Tray with Heat Mat
Choose Mr. Pen for open trays that can also handle sprouts and microgreens; choose Seedfactor if you prefer divided cells, humidity domes, grow lights, and a heat mat in the kit.
- Seedfactor is a 7-pack with 12 cells per tray and an included heat mat; its trays also have adjustable humidity domes and grow lights.
- The Mr. Pen trays provide reusable open space for seed germination, sprouts, and microgreens, and work with heat mats and humidity domes.
Is Mr. Pen Seed Trays Worth It?
Mr. Pen Seed Starter Trays are worth considering if you want reusable open trays for seed starting and other gardening jobs.
Five durable plastic trays, raised edges, and compatibility with common growing accessories make the set versatile for indoor or outdoor use.
They are a less suitable match when your priority is divided-cell seed organization or an integrated indoor germination setup.
For flexible open space that can move between planting and soil work, though, the five-tray set offers a clear, practical use case.
Your review at a glance
1,000+ ratings
Read Amazon ReviewsMr. Pen Seed Starter Trays
A reusable five-tray option for gardeners who want flexible open space for seed starting, sprouts, microgreens, potting, and soil mixing.
- Five seed starting trays in the package.
- Each tray measures 17 X 10 X 2.4 inches.
- Durable plastic construction is intended for repeated use.
- Raised edges help contain soil, fertilizer, and water.