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A seed tray placed on a medium seedling heat mat near a window
Small, medium and large seedling mats on the floor next to seed trays filled with seedlings
Seedling Heat Mats
AM156 – Small Seedling Heat Mat
AM157 – Medium Seedling Heat Mat
AM158 – Large Seedling Heat Mat

The medium mat can hold up to two standard 10" × 20" seed trays.

Seedling Heat Mats

Quantity:

From: $22.50

Choose an option to view item availability.

Designed to gently warm soil, these mats maintain temperatures 5° to 11°C (9° to 20°F) above ambient to hasten seed germination and encourage healthy root development in seedlings and cuttings. By warming the soil from below, the mats create consistent conditions seeds need to germinate evenly, even in cool rooms.

They’re effective with any non-insulated containers (avoid Styrofoam or expanded polystyrene, which are poor heat conductors). To maintain performance, store them rolled, not folded.

Available in three sizes. The 10" × 20 3/4" small mat can accommodate a single standard 10" × 20" seed tray. The medium mat measures 20" × 20 3/4" and can hold up two trays; at 48" × 20 3/4", the large can hold up to four seed trays.

The mats are cMETus certified.

A seed tray placed on a medium seedling heat mat near a window

Options:

Size

Variations:

  • AM156 – Small Seedling Heat Mat
    1 - $22.50
  • AM157 – Medium Seedling Heat Mat
    1 - $36.50
  • AM158 – Large Seedling Heat Mat
    1 - $59.50

Seedling Heat Mats

Designed to gently warm soil, these mats maintain temperatures 5° to 11°C (9° to 20°F) above ambient to hasten seed germination and encourage healthy root development in seedlings and cuttings. By warming the soil from below, the mats create consistent conditions seeds need to germinate evenly, even in cool rooms.

They’re effective with any non-insulated containers (avoid Styrofoam or expanded polystyrene, which are poor heat conductors). To maintain performance, store them rolled, not folded.

Available in three sizes. The 10" × 20 3/4" small mat can accommodate a single standard 10" × 20" seed tray. The medium mat measures 20" × 20 3/4" and can hold up two trays; at 48" × 20 3/4", the large can hold up to four seed trays.

The mats are cMETus certified.

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