{"product_id":"vivosun-3-pack-seedling-heat-mats-72-cell-starter-kit","title":"Vivosun 3-Pack 10\"x20.75\" Seedling Heat Mat w\/ 6-Pack Seed Starter Trays","description":"\u003ch4\u003e\u003c\/h4\u003e\u003ch2\u003eVivosun 3-Pack 10\"x20.75\" Seedling Heat Mat w\/ 6-Pack Seed Starter Trays\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cp\u003eOne heat mat covers only so many trays, and once you're germinating more than one crop at a time, a single temperature setting won't fit them all. The Vivosun 3-Pack 10\"x20.75\" Seedling Heat Mat w\/ 6-Pack Seed Starter Trays gives you three 10″ × 20.75″ heat mats, each with its own digital thermostat. That's three independent heat zones, paired with a 72-cell seed starter kit with vented humidity domes.\u003c\/p\u003e\n\u003cp\u003eEach heat mat uses far-infrared heating built into durable PVC and PET film designed to meet MET standards, with an IP67-rated waterproof surface that wipes and scrubs clean. The self-adjusting dual digital display controllers let you set a target temperature for each mat. They read an internal sensor chip and show each pad's real-time temperature, so you can run warm-season peppers and cooler-germinating herbs side by side.\u003c\/p\u003e\n\u003cp\u003eThe seed starter kit includes six 12-cell trays, six base trays, and six clear humidity domes with adjustable vents for managing moisture and temperature during germination. Drain holes in every cell prevent overwatering, and the trays tolerate 0–120°F, so they won't melt on the mats. Sow directly into the cells or place six 30mm seedling blocks on each base tray. When seedlings are ready, they transplant easily into pots or garden beds, and the reusable trays nest for storage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 20px 0;\"\u003e\n  \u003cvideo src=\"https:\/\/cdn.shopify.com\/videos\/c\/o\/v\/64a12a4d5b894b899fdf0a72649eff89.mp4\" style=\"width: 100%; height: auto; border-radius: 8px;\" autoplay muted loop playsinline controls loading=\"lazy\"\u003e\u003c\/video\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cstyle\u003e\n  .image-gallery-container{max-width:1000px;margin:20px auto;}\n  .image-gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;}\n  .gallery-item{aspect-ratio:1;overflow:hidden;border-radius:8px;}\n  .gallery-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform 0.3s ease;}\n  .gallery-item:hover img{transform:scale(1.05);}\n  @media (max-width:768px){\n    .image-gallery{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;}\n    .gallery-item{flex:0 0 85%;scroll-snap-align:start;}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"image-gallery-container\"\u003e\n  \u003cdiv class=\"image-gallery\"\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_5.jpg?v=1791395414\" alt=\"Vivosun seedling heat mat and seed starter tray combo\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_4.jpg\" alt=\"Vivosun seedling heat mat with dual digital display controller\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_3.jpg\" alt=\"Vivosun seed starter trays with vented humidity domes\"\u003e\u003c\/div\u003e\n    \u003cdiv class=\"gallery-item\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_6.jpg\" alt=\"Seedlings germinating on Vivosun heat mat\"\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n  .features-grid-container{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;padding:2rem 0;font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;margin:0 auto;max-width:1240px;}\n  .feature-card{background-color:transparent;padding:1.5rem;border-radius:8px;text-align:center;flex:0 1 240px;box-sizing:border-box;}\n\u003c\/style\u003e\n\u003cdiv class=\"features-grid-container\"\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🔥\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eThree 10″ × 20.75″ Mats\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eFar-infrared bottom heat across three separate mats for larger seed-starting setups.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🌡️\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eIndependent Thermostats\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eSet each mat to its own temperature with real-time dual digital readouts.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e💦\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eIP67 Waterproof Surface\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003ePVC and PET film mats scrub clean, built to meet MET standards.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e💨\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eVented Humidity Domes\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eSix clear domes with adjustable vents hold moisture through germination.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e🌱\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003e72 Cells or Seedling Blocks\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eSow into 12-cell trays or set six 30mm blocks on each base tray.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"feature-card\"\u003e\n      \u003cspan style=\"font-size: 2.5em; line-height: 1; color: #2c5530;\"\u003e💧\u003c\/span\u003e\n      \u003ch5 style=\"font-size:1.1em;font-weight:bold;color:#333;margin:0.75rem 0 0.5rem 0;\"\u003eHeat-Safe, Draining Trays\u003c\/h5\u003e\n      \u003cp style=\"font-size:0.95em;line-height:1.6;color:#555;margin:0;\"\u003eTrays tolerate 0–120°F and drain excess water to protect roots.\u003c\/p\u003e\n    \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3x Seedling Heat Mat (10″ × 20.75″)\u003c\/li\u003e\n  \u003cli\u003e3x Dual Digital Display Temperature Controller\u003c\/li\u003e\n  \u003cli\u003e6x 12-Cell Seed Trays\u003c\/li\u003e\n  \u003cli\u003e6x Base Trays\u003c\/li\u003e\n  \u003cli\u003e6x Humidity Domes\u003c\/li\u003e\n  \u003cli\u003e1x Garden Tool Kit\u003c\/li\u003e\n  \u003cli\u003e10x Garden Labels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4 style=\"margin-bottom: 0;\"\u003eSpecifications\u003c\/h4\u003e\n\u003cstyle\u003e.styled-spec-container{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid #eee;border-radius:8px;margin-bottom:1em;}.styled-spec-table{width:100%;border-collapse:collapse;}.styled-spec-table thead{background-color:#f8f8f8;}.styled-spec-table th,.styled-spec-table td{padding:12px 15px;text-align:left;vertical-align:top;}.styled-spec-table th{font-weight:bold;color:#333;border-bottom:2px solid #ccc;}.styled-spec-table td{border-bottom:1px solid #eee;}.styled-spec-table tbody td:first-child{font-weight:500;color:#444;}.styled-spec-table tbody tr:last-child td{border-bottom:none;}\u003c\/style\u003e\n\u003cdiv class=\"styled-spec-container\"\u003e\n  \u003ctable class=\"styled-spec-table\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eSpecification\u003c\/th\u003e\n        \u003cth\u003eValue\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Quantity\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Size\u003c\/td\u003e\n\u003ctd\u003e10″ × 20.75″ (each)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat Mat Material\u003c\/td\u003e\n\u003ctd\u003ePVC and PET Film\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeating Technology\u003c\/td\u003e\n\u003ctd\u003eFar-Infrared\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSafety Standard\u003c\/td\u003e\n\u003ctd\u003eDesigned to Meet MET Standards\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTemperature Controller\u003c\/td\u003e\n\u003ctd\u003eAdjustable, Dual Digital Display\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTemperature Sensing\u003c\/td\u003e\n\u003ctd\u003eInternal Sensor Chip, Real-Time Readout\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSeed Trays\u003c\/td\u003e\n\u003ctd\u003e6 × 12-Cell (72 Cells Total)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSeedling Block Capacity\u003c\/td\u003e\n\u003ctd\u003e6 × 30mm blocks per base tray\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHumidity Domes\u003c\/td\u003e\n\u003ctd\u003eClear, with Adjustable Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTray Drainage\u003c\/td\u003e\n\u003ctd\u003eDrain Holes in Each Cell\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTray Temperature Tolerance\u003c\/td\u003e\n\u003ctd\u003e0–120°F\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eSupport \u0026amp; Manuals\u003c\/h4\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px;\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_Manual.pdf?v=1791395300\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display: inline-flex; align-items: center; background-color: #f7f7f7; border: 1px solid #ddd; border-radius: 8px; padding: 12px 18px; text-decoration: none; color: #333; transition: background-color 0.3s ease, box-shadow 0.3s ease;\"\u003e\n\u003cspan style=\"font-size: 1.5em; margin-right: 12px;\"\u003e📄\u003c\/span\u003e\n\u003cspan style=\"font-weight: bold;\"\u003eSeedling Combo User Manual\u003c\/span\u003e\n\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cdiv class=\"faq-container\"\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWhy choose the 3-pack heat mat combo over a single mat?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eThree mats give you more heated surface area for larger seed-starting setups. Because each mat has its own thermostat, you can run three different temperatures at once, which is ideal when germinating crops with different heat needs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow do I set the temperature on each heat mat?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eUse each mat's digital controller to enter a target temperature for what's growing on it. The controller reads the mat's internal sensor chip and displays the pad's real-time temperature alongside your setting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eWill the seed trays melt on the heat mats?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eNo. The seed starter trays tolerate temperatures from 0 to 120°F, so they hold up to continuous bottom heat without melting or warping.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eCan I clean the heat mats if water spills on them?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. Each heat mat has an IP67-rated waterproof surface that's safe to wipe and scrub. Regular cleaning keeps them hygienic and working properly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eHow should I use the vents on the humidity domes?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eKeep the vents closed to hold in moisture and warmth while seeds germinate. As seedlings emerge, open them gradually to release excess humidity and help seedlings adjust to drier air.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eCan I use seedling blocks instead of starting mix?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. Sow directly into the 12-cell trays with your starting mix. Or remove the cell tray and place six 30mm seedling blocks, such as rooter plugs or compost pucks, on each base tray.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-question\"\u003e\n\u003cspan\u003eAre the trays reusable?\u003c\/span\u003e\n\u003cspan class=\"faq-icon\"\u003e+\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eYes. The durable trays and domes can be cleaned and reused for multiple seasons, and they nest together for compact storage between plantings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":52642286764248,"sku":"WEB-SST-H-0003","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1383\/1731\/files\/Vivosun_Seedling_Combo_9.jpg?v=1791395682","url":"https:\/\/trimleaf.com\/products\/vivosun-3-pack-seedling-heat-mats-72-cell-starter-kit","provider":"Trimleaf","version":"1.0","type":"link"}