Walmart US Ecommerce Website

GENERAL MERCHANDISE

PHARMACY

GROCERIES

VUDU

SPARK

PHOTO

ADVERTISING

SAVINGS CATCHER

GIFTCARDS

INHOME

AFFILIATE

ONEAPP

LOTUS

HELP

SMART_REORDER

GROCERY

CONV_COMMERCE

Try it free

Glass WEB: Walmart + "Non Member" PIP Banner Wk 19 2025

Buy Box Ad Container Module for Desktop

Custom HTML Module - About Klarna

Custom HTML Module - About SalesFinancing - Second update

You'll choose a plan at checkout.

#515357

I want delivery savings with Delivery Pass

#0071dc

NEW Fulfillment Tue Apr 15 2025 2:17 PM EDT

MTZ Team | Marquee 1 Ad | Item Page

MTZ Team | Marquee 2  Ad | Item Page

MTZ Team | Skyline Ad | Item Page

Other products of interest

MTZ Team | Sponsored Product Carousel - Item Page

More items to explore

MTZ Team | Sponsored Product Carousel - Item Page Broad 

NEW AddonServicesRedesign Fri Jul 18 2025 1:30 PM EDT

NEW AddToCart Mon Jul 14 2025 3:50 PM EDT

NEW AddToCart Tue Apr 15 2025 2:19 PM EDT

NEW BrandBoxDisplayAd Mon Jul 14 2025 9:14 PM EDT

NEW BrandLink Wed Apr 23 2025 12:07 AM EDT

NEW Breadcrumb Mon Apr 07 2025 8:23 PM EDT

Walmart Rewards Mastercard

NEW FinancingOptions Tue Dec 10 2024 3:32 PM EST

I want shipping & delivery savings with

NEW Fulfillment Mon Jul 14 2025 4:00 PM EDT

NEW InternationalShipping Mon May 18 2026 1:02 PM EDT

New Item Page - Nutrition Value Placeholder Module, Wednesday, February 08, 2023, 5:11:53:90 pm

New Item Page - Product Description Placeholder Module, Wednesday, February 08, 2023, 5:14:04:38 pm

New Item Page - Product Ingredients Placeholder Module, Friday, February 10, 2023, 10:34:23:79 am

New Item Page - Product Specifications Placeholder Module, Wednesday, February 08, 2023, 5:15:29:61 pm

New Item Page - Reviews Placeholder Module, Wednesday, March 22, 2023, 10:04:29:34 am

New Item Related Shelves Module, Thursday, June 15, 2023, 6:08:51:10 am

 Price Match Policy

Prices, terms, and availability may vary online, in stores, and in–app. If the advertised price is not shown here, inventory at the advertised price may now be sold out. Please see the other offers, if available, while quantities last. Some items may be available from Marketplace Sellers, who set their own prices, and are not eligible for price match. Items sold in store by Walmart may be eligible for a price match to online items shipped and sold by Walmart. For variable weight items, price shown is an estimated price only – you will be charged for the actual weight of the item. See our

NEW LegalPriceDisclaimer Mon Jul 14 2025 4:11 PM EDT

NEW LegalPriceDisclaimer Wed Apr 30 2025 12:13 AM EDT

NEW ListsAndRegistries Tue Apr 15 2025 4:50 PM EDT

NEW PaymentPlans Mon Jul 14 2025 4:15 PM EDT

NEW PaymentPlans Tue Apr 15 2025 1:31 PM EDT

NEW PriceInformation Tue Apr 15 2025 1:30 PM EDT

NEW ProductDescriptionPlaceholderATF Tue Jul 08 2025 11:41 PM EDT

NEW ProductFlags Thu Apr 10 2025 11:42 PM EDT

NEW ProductHighlightsPlaceholder Wed Jul 02 2025 12:43 AM EDT

NEW ProductImages Tue Apr 15 2025 2:13 PM EDT

NEW ProductName Tue Apr 15 2025 12:53 PM EDT

NEW ProductReturnPolicyDetails Tue Dec 10 2024 3:17 PM EST

NEW ProductReturnPolicy Mon Jul 14 2025 5:04 PM EDT

Return Policy

NEW ProductReturnPolicy Tue Apr 15 2025 2:28 PM EDT

NEW ProductStickyBuyBox Wed Jul 02 2025 12:55 AM EDT

NEW PromoDiscount Tue Apr 15 2025 6:53 PM EDT

New SellersSecondaryBuyBox Module, Tuesday, September 05, 2023, 4:02:21:76 pm

Shop Confidently

NEW ShopWithConfidence Thu Jan 15 2026 2:20 PM EST

NEW SocialProofMessage Tue Apr 15 2025 7:17 PM EDT

NEW SoldAndShippedBy Mon Jul 14 2025 5:04 PM EDT

NEW SoldAndShippedBy Tue Apr 15 2025 2:23 PM EDT

New!

More savings, less stress.

HSK_Subscribetosave_E_v2

NEW SubscriptionOptionsModule Tue Apr 15 2025 6:44 PM EDT

NEW SubscriptionPriceMessage Wed Apr 23 2025 6:48 PM EDT

NEW Variants Wed Apr 23 2025 11:01 PM EDT

[Sticky] BuyBoxAd Mon Aug 11 2025 3:59 AM EDT

[Sticky] PriceInformation Mon Jul 14 2025 4:03 PM EDT

Syndigo

True

dWeb: L1/L2- Comparison Chart- WK 07, 2026

#000000

Item Carousel - Rich Relevance 1

RR carousel

Item Carousel - Rich Relevance 2

RR carousel 2

Item Carousel - Rich Relevance 3

Hydrofarm MTMDA Jump Start  60" x 21" Hydroponic Heat Mat Modular Add-On, 3 Pack

<ul><li>(3 Pack) of Hydrofarm MTMDA Seedling Heat Mat Modular Add-Ons</li><li>Give your plants a leg up when they’re starting off by warming their roots</li><li>Daisy chain up to 5 units (4 of these add-on units plus the Commercial Mat MTMDU)</li><li>The MTMDU heat mat is required and is sold separately</li><li>60 x 21-inch heat pad size is the perfect size for 5 flats of plants</li><li>Increases growing success by maintaining a controlled temperature all season long</li><li>Improve germination by warming seedling roots</li><li>Place the mat on a stable dry surface, then plug the mat into a 120-volt grounded outlet</li><li>Plug into the Digital Heat Mat Thermostat (MTPRTC sold separately, required)</li><li>Runs on 140 watts of power and 120 volts</li><li>Raises ambient temperature by 10 to 20 degrees Fahrenheit</li><li>Includes power cords that plug into an MTMDU heat mat and/or another MTMDA mat.</li><li>The mat at the start of the chain must be an MTMDU, which plugs into our Digital Heat Mat Thermostat (MTPRTC) (required, sold separately)</li><li>Waterproof construction means you don’t have to worry about splashing when watering your plants</li><li>Rugged and durable with waterproof connectors</li><li>UL listed</li><li>Some of the only UL-listed heat mats on the market</li><li>Voltage: 120 volts</li><li>Wattage: 140 watts</li><li>What’s included: Power cord, heat mat</li><li>Product/item type: Heat mat</li><li>Color: Black</li><li>Part Number: MTMDA</li><li>Quantity: 3 add-on mats</li><li>Requirements: MTMDU heat mat and MTPRTC controller</li><li>Dimensions (L x W): 60 x 21 inches</li><li>Manufacturer warranty: 4-year warranty</li></ul>

Brand

Model

This (3 Pack) of the add-on units for the MTMDU Commercial Heat Mat. The 60x21 inch mat will maximize your seed starting area by daisy chaining up to 4 of these units to the MTMDU unit (MTMDU sold separately) and is required. The new, stronger heating wire and thicker multi-layer construction offer more uniform heating and the durability to withstand rugged greenhouse environments. The waterproof construction means you don't have to worry about splashing when watering your plants with the rugged and durable waterproof connectors.

Bottom heat is one of the most important and effective ways to improve rooting and germination. Our new heavy duty modular commercial heat mats will provide uniform heat for hundreds of your seedlings or cuttings. Warms root area 10-20°F over ambient temperature to improve germination. Plug into our Digital Heat Mat Thermostat MTPRTC (also sold separately) and is required.

Universal Product Code (UPC check)