VIVOSUN 20"x20.75" heat mat and digital thermostat combo kit for seedling germination and rooting.

VIVOSUN seedling heat mat with starter trays, 68-86°F optimal germination. Shows tomatoes, chili, eggplant, roses.

VIVOSUN 20"x20.75" seedling heat mat with specs: 120V AC, 40W, 0-40°C (32-104°F) temp range, 5.9 ft cord.

VIVOSUN Far-Infrared Heating Tech seedling heat mat diagram shows green seedlings in a tray with heat arrows & >90% efficiency.

Adjustable VIVOSUN digital thermostat with 87.5°F display, 40-108°F range dial, impact and vibration tested.

Multi-layered VIVOSUN seedling heat mat cross-section with PVC mats, glowing hexagonal heating film, UL/MET certified.

Four scenes showing a VIVOSUN seedling heat mat for plant sprouting, lizard terrarium, indoor gardening, and home brewing.

VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo

Price:

$69.99 USD

Pay as little as
$6999/mo

for a term that suits you, up to 36 months.

🍃 Earn 70 points for shopping and get $0.69 off your next order. Join Harvest Club for free

MODEL: WEB-330102CNJ

Free Shipping Over $50 on Most
Lowest Price Guaranteed
Get a Commercial Quote

Call an Expert Live Chat

VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo

Struggling with slow germination or inconsistent seedling growth, especially in cooler temperatures? The VIVOSUN Seedling Heat Mat with Digital Thermostat is the professional solution for providing consistent, controlled bottom heat. This system accelerates germination and promotes robust root development, giving your plants the strong start they need.

Designed for dedicated home gardeners and commercial growers, this combo provides precise control over your propagation environment. The 20″ x 20.75″ heat mat gently warms the root zone to 10-20°F above the ambient air temperature, creating the perfect conditions for seeds and cuttings to thrive. Running on an energy-efficient 45 watts, it's large enough to cover two standard 1020 trays without driving up your electricity bill.

Built for reliability, the mat features durable Alloy Nikrothal heating wire and reinforced PET film insulation for uniform heat distribution, preventing hot spots that can harm delicate roots. Its water-resistant construction ensures safe operation in humid environments and makes cleanup effortless. Backed by MET safety standards, this combo is a dependable tool from the trusted VIVOSUN lineup, ensuring successful results season after season.

What's Included

1 x VIVOSUN 20″ x 20.75″ Seedling Heat Mat
1 x VIVOSUN Digital Thermostat Controller

Features

VIVOSUN VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo digital thermostat controller

VIVOSUN VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo showing uniform heating wire

VIVOSUN VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo energy efficient design

🌡️

Precise Temperature Control

Dial in the exact temperature for consistent germination and healthy root growth.

🔥

Uniform Heating

Alloy Nikrothal wire ensures even warmth across the mat, eliminating dangerous hot spots.

💧

Durable & Water-Resistant

Built with a reinforced PET film layer that is safe for humid environments and easy to clean.

💡

Energy Efficient

Operates on just 45 watts, providing consistent heat without high energy costs.

Specifications

Specification	Value
Size	20″W x 20.75″L
Voltage	120V - AC
Wattage	45 Watts
Temperature Range	0-40°C (32-104°F)
Insulation Resistance	≥100MΩ500Vdc
Service Life	≥30000H

Support & Manuals

📄VIVOSUN Seedling Heat Mat Manual 📄VIVOSUN Digital Thermostat Manual

Warranty

This product is covered by a 1-year after-sale service, including a free return within 30 days of delivery. VIVOSUN's professional support team is available to ensure your investment is protected.

FAQs

What is the ideal temperature for seed germination?+

Most seeds germinate best in a temperature range of 70-85°F (21-29°C). The digital thermostat allows you to set and maintain the perfect temperature for your specific plant varieties, ensuring optimal success. For detailed starting advice, check out our beginner's guide to growing indoors.

Can I place my seed tray directly on the mat?+

Yes, you can place standard 1020 seed trays or other containers directly on the heat mat. For best results, we recommend using the heat mat in conjunction with humidity domes to create a complete, warm, and moist microenvironment for your seedlings.

Is this heat mat safe to use inside a grow tent?+

Absolutely. The VIVOSUN heat mat is MET certified and features a water-resistant design, making it perfectly safe for use inside all types of grow tents and other humid propagation areas.

Do I need a larger size for my setup?+

This 20" x 20.75" mat is ideal for up to two standard 1020 trays. If you are propagating a larger number of plants, you may want to consider a larger option like the VIVOSUN 48" x 20.75" Heat Mat Combo to maintain consistency across your entire setup.

Can I use this for anything other than plant seedlings?+

Yes, the controlled, gentle heat is also perfect for propagating cuttings, brewing kombucha or yogurt, fermenting foods, and maintaining warm temperatures for reptile terrariums.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

VIVOSUN 20″ x 20.75″ Digital Thermostat Seedling Heat Mat Combo