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2 Vivosun seedling trays with heat mats & 4 extra trays.
VIVOSUN seed starter trays kit with LED grow light, humidity dome, heat mat, and temperature controller.
VIVOSUN seed starter tray with dome, heating mat, and digital thermostat controller for precise temperature regulation and plant growth.
Black seed starter tray with 40 cells, healthy green seedlings, and drainage holes.
VIVOSUN LED grow light bar features 5000K color temp, 12W/C power, 4 dimming levels, and 3 timer settings.
VIVOSUN seed starter tray with heat mat, digital thermostat, and seedlings growing.
Vivosun seed starter tray with LED grow lights, adjustable vents, and easy-lift handles.
Vivosun seed starter tray with 3.6" high dome, adjustable vents for humidity control.
2 Vivosun seedling trays with heat mats & 4 extra trays.
VIVOSUN seed starter trays kit with LED grow light, humidity dome, heat mat, and temperature controller.
VIVOSUN seed starter tray with dome, heating mat, and digital thermostat controller for precise temperature regulation and plant growth.
Black seed starter tray with 40 cells, healthy green seedlings, and drainage holes.
VIVOSUN LED grow light bar features 5000K color temp, 12W/C power, 4 dimming levels, and 3 timer settings.
VIVOSUN seed starter tray with heat mat, digital thermostat, and seedlings growing.
Vivosun seed starter tray with LED grow lights, adjustable vents, and easy-lift handles.
Vivosun seed starter tray with 3.6

Vivosun 6-Pack 240-Cell Seed Starter Kit

Official VIVOSUN Dealer Model: WEB-SST-3-0006
$89.99 USD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
Looking to finance equipment under your corporation? Learn more about Business Financing
  • 240 total cells across six 40-cell trays
  • Thermostat-controlled heat mats adjustable from 34 to 122 degrees Fahrenheit
  • IP67-rated heat mat surface stands up to watering drips and spills
  • 1-year limited manufacturer warranty on Seedling Heat Mats against manufacturing defects
  • View More Details

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Mon to Fri, 9am to 5pm PST

Call (360) 800-5535
  • Free Shipping On Most Items*To the lower 48
  • Transparent PricingBacked w/ price match guarantee
  • 4.8/5 Top Quality Store on Google
  • Secure CheckoutSSL encrypted payments

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THROUGH THE Cultivator's LENS Highlights

  • You are starting seeds in a cold room because weak window light and low temperatures cause seedlings to germinate slowly and stretch into thin stems.
  • You are upgrading your propagation setup because manual watering and uneven heat control keep leading to weak root growth and stressed young plants.

  • The 5000K LED bars mount right on the domes and offer four brightness levels with three timer cycles to fit early growth stages.
  • The thermostat-controlled heat mats warm the root zone from 34 to 122 degrees to keep temperatures steady during early rooting.
  • The clear domes provide 3.6 inches of headroom and feature two adjustable vents for precise humidity and temperature control.

  • Growers who struggled with slow germination in cold rooms say the heated root zone and adjustable lights made their seedlings sprout faster and more evenly.
  • Buyers who previously dealt with leggy growth under weak window light report that the mounted LED bars kept their young plants sturdy and compact.

Vivosun 6-Pack 240-Cell Seed Starter Kit with 2 LED Light Sets & 2 Seedling Heat Mats

Seeds started in a cold room under weak window light germinate slowly and unevenly, then stretch into thin, leggy seedlings. The Vivosun 6-Pack 240-Cell Seed Starter Kit controls the three things that matter most at this stage: root-zone warmth, light, and humidity. Six 40-cell trays give you 240 cells in total. Two thermostat-controlled heat mats warm the root zone from 34°F to 122°F, and two dimmable 5000K LED light sets mount right on the domes.

Each tray set includes a black 40-cell insert, a base tray, and a clear humidity dome with 3.6" of headroom. Two adjustable vents on each dome let you fine-tune humidity and temperature as seedlings develop, and a center handle lifts the dome without disturbing the trays. Drainage holes in every cell help prevent overwatering, and the black cells support healthy root growth.

The LED bars run on four brightness levels (25%, 50%, 75%, and 100%) and three timer cycles: 8, 12, or 18 hours on. Each heat mat's digital controller shows both the real and set temperature, and its IP67-rated surface stands up to drips and spills. Fill the cells with soil or rockwool cubes, then transplant seedlings to pots or the garden when they're ready.

Features

Vivosun seed starter tray with 3.6 inch humidity dome and adjustable vents
Vivosun seed starter dome with embedded LED lamps, handle, and snap design
Vivosun seedling heat mat with dual digital temperature controller and IP67 surface
Vivosun LED grow light bars with dimming levels and timer settings
🌱
240 Cells Across 6 Trays

Six 40-cell trays, each with its own base tray and humidity dome.

💡
Dimmable LED Light Bars

5000K bars with 4 brightness levels and 8, 12, or 18-hour timer cycles.

🔥
Thermostat-Controlled Heat

Set the mats from 34–122°F, with real and set temperatures shown side by side.

🌫️
3.6" Vented Domes

Tall clear domes with two adjustable vents to fine-tune humidity and temperature.

💧
Drainage & Root Support

Drainage holes prevent overwatering, and black cells support root growth.

🛡️
IP67-Rated Heat Mats

A water-resistant surface handles drips and spills from watering trays.

What's Included

  • 6x Humidity Domes with Adjustable Vents
  • 6x 40-Cell Seed Trays
  • 6x Base Trays
  • 2x LED Light Bar Sets with Timer/Dimmer Controller and Power Adapter
  • 2x 10" × 20.75" Seedling Heat Mats with Digital Temperature Controllers
  • 1x Heat Mat User Manual

Specifications

Specification Value
Total Cells 240 (6 trays × 40 cells)
Tray Material PET, PP
Assembled Tray Set 15.2" × 10.1" × 5.6"
Humidity Dome 15.2" × 10.1" × 3.6"; 2 adjustable vents
40-Cell Seed Tray 14.0" × 8.9" × 2.0"; drainage holes
Base Tray 14.7" × 9.7" × 2.3"
LED Light Bar 12.2" × 0.6" × 0.3"
LED Color Temperature 5000K
LED Power / Input 12W; 12V
LED Dimming 25%, 50%, 75%, 100%
LED Timer 8H on/16H off, 12H on/12H off, 18H on/6H off
LED Certification UL
Heat Mat Size 10" × 20.75"
Heat Mat Power 20W ±10%, 120V AC, 60Hz
Heat Mat Temperature Setting 34–122°F; default 95°F
Heat Mat Water Rating IP67 surface
Heat Mat Service Life ≥30,000 hours

Warranty

The Vivosun Seedling Heat Mats are covered by a 1-year limited manufacturer warranty against manufacturing defects from the original date of purchase.

Frequently Asked Questions

How many seedlings can I start with this kit? +

The kit includes six 40-cell trays, for 240 cells in total. With two heat mats and two LED light sets, you can heat and light two tray sets at a time while the rest start under your own conditions.

How do I set the heat mat temperature? +

Press ON/OFF to start heating at the default 95°F, then use the + and − buttons to set your target between 34°F and 122°F. The display shows both the SET TEMP and the REAL TEMP. The screens turn off after a period of inactivity; press + or − to wake them.

Will the heat mat remember my temperature setting? +

Turning the mat off with the ON/OFF button keeps your current setting. Unplugging the power cord or a power outage resets it, so you'll need to set the temperature again.

Where should I place the heat mat? +

Unfold the mat on a flat, stable, dry surface free of sharp objects, then set the tray on top. Never place the mat inside the tray, cover it with soil, or put insulating materials over it. The mat is for indoor use only and shouldn't be used in water, despite its water-resistant surface.

How do the LED light settings work? +

The inline controller offers four brightness levels (25%, 50%, 75%, and 100%) and three timer cycles: 8 hours on/16 off, 12 on/12 off, or 18 on/6 off. The 5000K bars mount on the dome to bring light close to young seedlings.

Can I use rockwool instead of soil? +

Yes. The cells work with soil-based seed starting mix or rockwool cubes. When seedlings are ready, remove them from the cells and transplant them into pots or your garden.

How do I use the dome vents? +

Rotate each vent cover to open or close the airflow holes. Keep the vents more closed for higher humidity during germination, then open them gradually to lower humidity and temperature as seedlings grow.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

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