The 10 Best Seedling Heat Mats and Thermostats

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heat mat

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The 10 Best Seedling Heat Mats and Thermostats

For those who are cultivating house plants or preparing yourself for the next season, you will need a suitable scenery that will be used to propagate the seeds.

You may also use it for germinating the seeds. Seeds do need ample heat, air, light, and moisture for them to grow.

In those places that do not have warm weather, then you should think through getting one of these best heat mats that come with a thermostat. 

The importance of a heat mat is that it will assist in starting up the process of germination, whether in the soil or on the hydroponics.

Things to consider when you decide to buy Best Seedling Heat Mats.

  • With your gardening needs, choose a size of heat mats that fits your requirements best.

For a small-sized garden, you will require a 10” by10” heat mat. This can mostly apply in the indoor gardens, which sometimes can be small in size.

  Depending on your mat, you can fit two starting trays on one mat or buy more if more mats are needed.

  • Your Best Seedling Heat Mats should be waterproof.
  • The power cords on the heat mat should have sufficient length that allows them to get to the outlet without having to use extension cords.
  • You should consider the power wattage that is suitable for your needs. It will show how much power it draws to itself and the highest level of temperature it can supply.

Mats that range around 15 watts will produce less heat, and those that range around 150 watts will produce more so choose according to what is appropriate for your requirements.

  • You should also consider the current temperature since Best Seedling Heat Mats that have 120 watts usually heat up to 80 degrees, and you might just be needing an addition of 10 to 20 degrees to your current temperature.
  • You should also consider the durability of a product. You should go for the product that will serve you for an extended period.

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Things to consider when buying a thermostat

  • Look for a thermostat that has a scale of both Fahrenheit degrees and Celsius degrees. This will save you the trouble of calculating when converting one to the other.
  • Check for a thermostat probe or sensor that can be inserted in the soil. This is definitely what you might be looking for to identify the temperature of the soil.

This will help you know whether to decrease or increase the heat of the heating mat.

  • Some thermostats help regulate many heat mats at the same time. The thermostats are more durable and can give more services.
  • Do not forget to check its quality and also the durability.

With the above information, here is a list of the top 10 best seedling heat mats and thermostats.

Do not forget to consider the above guidelines when choosing the best product that fits your needs.

Apollo Horticulture 9” by 20” Seedling Heating Mat and Digital Thermostat Combo Set

The set has one digital thermostat and the Best Seedling Heat Mats. The heating mat has an area of 9” by 20”. It is durable and comes in good quality.

It purportedly warms the root area to about 10 -20 degrees Fahrenheit above the normal room temperature. This is suitable for enhancing root growth.

 You can also use it in rooting clones as it generates an incredible environment for your seeds.

You have to keep checking and adjusting the temperature, or the heat mat will overheat the roots.

You do not have to connect the thermostat directly to the mat. You can choose to do so if you need to check the heat mat’s temperature regularly.

What we liked about it:

  • The Best Seedling Heat Mats usually upholds an unfluctuating range of temperatures.
  • It is suitable for use in greenhouses and indoor gardening.
  • It comes with a detached power cord that is to be used with the thermostat.
  • The thermostat has scales that are in Celsius and Fahrenheit, making work more comfortable for you.

What we did not like about it:

  • The Apollo Horticulture does not contain a shut that can automatically control the system just in case the temperatures rise.
  • The heat is not well distributed at the edges as it is distributed at the center.

Hydrofarm Jump Start MT10006 Seedling Heat Mat

The Hydrofarm Jump Start Heat mat is long-lasting, and you can be sure that it will serve you for a long time.

It is also waterproof and  contains a UL certification making it the only Best Seedling Heat Mats heated type that is UL listed. It measures 8.87” by 19.5,” which is bigger compared to the Apollo Horticulture Mat.

 Most people prefer to use the bigger sized mats for germinating herbs and also microgreens.

It warms the root part of the seedling 10 to 20 degrees Fahrenheit over the normal room temperature, just like the Apollo Horticulture model does.

The power cord is long enough since it is usually 6-foot-long, and this enables it to get to an outlet with much ease.

The mat also comes with its instructions printed on its body. They contain the directions for use and the safety measures when handling the mat.

What we liked about it:

  • It comes in a large size.
  • The heat mat can maintain a uniform temperature.
  • The heat mat is suitable for indoor gardening, greenhouses, and also open-air gardening.
  • It has a 6-foot-long power cord.

What we did not like about it:

  • The heat mat pack you purchase does not include a thermostat, so you will be required to buy your thermostat independently.
  • The heat is properly distributed at the center, and so it does not reach the edges perfectly.
  • There might be the occurrence of burnt holes if you do not keep checking it regularly.

Vivosun Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 10” by 20.75”

The heat mat comes with a one -year warranty. It weighs around 3.7 pounds and has a dimension of 22.1 by 4.4 by 4.3 inches.

 It is durable, a bit more flexible compared to other heat mats, and it is also waterproof.

The Best Seedling Heat Mats are able to maintain temperatures of about 10 to 20 degrees Fahrenheit above the normal temperature, which is similar to other models like the Apollo Horticulture and the Hydro Farm Jump Start.

Its digital thermostat ensures that the temperature ranges from 68 to 108 degrees Fahrenheit. The temperature is suitable for seed starting and the growth of the seedlings.

Comes with an extra layer for insulation with measurements of 10” by 20.75”. This fits perfectly with the standard 1020 sized trays.

The mat contains a reusable bag for storage, and a unique feature about it is that it becomes flat when it consumes its power source to heat the seeds or seedlings.

You might also consider storing the bag when it is rolled up.

What we liked about it:

  • The heat mat can uphold even temperature
  • The heat mat is incredibly appropriate for use in greenhouses and indoor gardening.
  • The heat mat has a larger size compared to other mats.
  • When you purchase the set, you get a heat mat, storage bag, and a thermostat.
  • After storing it, it can be easily unrolled for use.
  • The heating mat comes with an extra layer of insulation that aids in shielding the seedlings from overheating.

What we did not like about it:

  • It can easily burn or melt plastic surfaces and wood surfaces as well.
  • If you do not take care of it well enough or store it properly, it will repeatedly fail to serve its purpose.

iPower 10” by 20.5” Warm Hydroponic Seedling Heat Mat

This model of heat mats comes with a manufacturer’s warranty that lasts for one year. It has measurements of 10” by 20.5” similar to that of the Vivosun model and the JumpStart model.

It is also made with multilayered insulators that help in upholding unfluctuating temperatures.

 The iPower heat seedling mat has a thick construction that contains several layers. It also provides strong wires for heating. 

The heating mat can be used in other different ways, like ensuring that the drinks are kept warm and also warming up the house pets, making it an accessory that can be used every day.

The mat comes with a system that can shut down automatically when the set target temperature is reached.

You will not be needed to go check it out after every minute, and this makes your work easier.

What we liked about it:

  • The heat mat can be easily cleaned.
  • It can uphold an unfluctuating temperature.
  • The heat mat comes with a feature that enables it to shut down when your intended temperature is reached automatically.
  • The thermostat has an LED light for better vision, even during the night.
  • The iPower heat mat comes with a precise temperature sensor.

What we did not like about it:

  • Even though it has LED lights, they flicker, and this might not be the best choice for you.
  • When you compare this model to other heat mat models, you find that this model does not last as long as the others last. This is a great factor to consider when buying a heat mat for seedlings.

Root Radiance Warm Hydroponic Heating Pad, 20.75” by 10”

The heating pad comes with a power cord that has a length of 6 foot. It is water-resistant, and it has measurements of 20.75” by 10.

The mat is usually a little bit longer than the other models. The heating pad can uphold a temperature of around 10 to 20 degrees Fahrenheit above the normal room temperature.

That range of temperature is suitable for the growth of seedlings. It does not contain a thermostat. You will be required to buy it separately.

What we liked about it:

  • The heating pad is water-resistant.
  • You can easily use it.
  • The heating pad does not require a regulator.
  • It is suitable for use in the greenhouse, indoor gardening, and also for nurseries.

What we did not like about it:

  • The quality of the heating pad is not as durable as one would be expecting it to be; hence it does not last for a long time.
  • The only part that heats up perfectly is the center, and the heat does not get well distributed at the edges.

Vivohome Waterproof Seedling Heat Mat with Thermostat

The heating mat comes with a warranty that lasts for one year. It weighs around 1.65 pounds and has measurements of 11 by 4.7 by 4.4 inches.  

The heating mat has met the MET standards, and the thermostat controller it has is UL certified. It can support a power load of up to 1000W.

Offers the greatest temperature control feature and ensures that your seeds germinate faster.

The mat has a digital thermostat that maintains the temperature that ranges between 68 and 108 degrees Fahrenheit and moderately controls the temperature of the soil.

The mat also offers ideal temperatures in the soil that help the seedlings germinate.

This heating pad usually makes the root part of your seedlings warmer, with about 10 to 20 degrees Fahrenheit above the normal room temperature.

As for the thermostat controller, it makes the germination rates better by maintaining suitable rooting temperatures.

From this, you will be able to get faster seedling growth and also cutting growth.

The heating mat is one of the simplest germinating mats that you can use. You will only be required to place the heating mat on a dry surface.

The surface should also be flat. Place the seedling trays at the top and then plug the power cord into a standard 120V outlet.  

The digital thermostat has a three button edge that enables easy adjustment and makes it easy to operate.

The mat has an LED screen that displays the current temperature each time the Vivohome Waterproof Seedling Heat Mat with Thermostat setting is deactivated.

You can also press the button labeled SET, and the heat mat will show the current temperature before setting the temperature.

Next, press the down button or the up button, and this will allow you to regulate the temperature to your most desired one.

When your heating mat is not emitting heat, then the HEATING light cycle is on. You will know that the mat has heated to the preset temperature when the light switches off automatically.

For you to read the temperature in degree Celsius, then press and do not let go of the DOWN button for about three seconds.

 If you prefer to read the temperature in degree Fahrenheit, then press the UP button and do not let go of the button, and the degrees will be displayed.

You will also get a storage bag when you buy this set. It also comes with a power cord that has a length of 5.8 feet and a probe cord that has a length of 6.4 feet.

The heat mat can be simply rolled when you want to store it.

For use, you can pursue the manufacturer’s instructions. You can be assured that your seeds and seedlings will germinate faster and in a healthy form.

Growerology Heat Mat Thermostats Seed Starter Kit

The Growerology Heat Mat weighs around 0.75 pounds and is MET certified. It is waterproof and provides reliable and better quality insulation.

The insulation features increase the warmth of the soil, making the seedlings and seeds propagate faster.

You get the results of healthy plants. It comes with a warranty that lasts for one year. It has measurements of 10 by 20.8 by 1 inch.

You can warm the part that has roots to about 10 to 20 degrees Fahrenheit more than the normal room temperature. has a power cord that has a length of 6 feet.

The heating mat is also CE, and UL certified.

The process of the growth of the seeds and seedlings is fastened through providing the most suitable temperature.

When you control the temperature of the soil to around 70 and 80 degrees Fahrenheit, then you can be assured of the prevention of the loss of heat, and this will maximize the appropriateness of the heat.

The insulation pad is composed of foam and aluminum. You are required to put it under the heating mat to minimize any loss of heat.

When you do not consider this, the heat will be lost downwards and will not be as beneficial as it is supposed to be.

The heating pad is made in a way that prevents it from overheating, and it does not have a feature that enables it to shut down automatically after reaching a certain level of degrees Celsius or degrees Fahrenheit.

Despite this, you can let the heating pad be on as long as you would like to and be assured of it not overheating.

The heating mat has a germination chart that is printed on it. It will assist you in identifying the needs of different levels of germination.

The heating pad is easy to move and also easy to use.

This heating mat is one of the most affordable ones that there is in the market.

IPower GLHTMTL Durable Waterproof Seedling Mat

The heating pad has a warranty that has a period of one year from the date of purchase. 

The mat only weighs 0.75 pounds. Its dimensions are ten by 20.8 by 1 inch. It is known for its quality products and has been in service for about the past ten years.

 It will assure you of the increased quality of seedlings and cuttings. It will be suitable for every person that aims at improving propagation and the efficiency of ideal temperatures.

The heating mat gives the warmth of around ten to twenty degrees Fahrenheit above the normal room temperature.

This is just the best soil warmth for those that have just begun growing the seedlings or those who are experienced in growing the seedlings and cuttings.

 You are just required to place something on the mat and warm it.

The most degrees that the heating pad can get to is 100 degrees, but for those areas that are well heated, they can maintain the temperature of about 70 to 90 degrees Fahrenheit.

Make sure you place the heating mat on a flat and dry surface.

This heating pad ensures that the seedlings germinate accordingly through effectively warming the root area of the seedlings.

Do not place the heating mat on a cold surface since that might interrupt the heating process of the mat.

For the electrical cord, plug it into a 120V standard outlet. Place a germination tray on the mat.

The heating pad is highly durable as it contains a heavy-duty construction that is multilayered.

It will work perfectly for indoor gardening.

The heating features are wrapped with medium weight plastic material. It also contains strong wires for heating that ensure that the heat is even.

Its water proof nature enables more natural cleaning. Do not forget that the heat mat is MET listed, and its cord is ETL listed.

It comes with an automatic shutdown component and also has insulated wiring that is internal, and this heightens the level of safety.

After wiping your mat with a damp cloth, roll it then store it in a safe and dry place.

Vivosun 20” by 20” Seedling Heat Mat

This heating mat is durable, and you can be sure of long-lasting services. It is also waterproof and has met the MET standards.

 In the past years, Vivosun has been known for supplying good quality products. The heating mats distribute the temperature evenly from the center to the edges.

Since it measures 20” by 20” it offers ample space for you to put two trays of cuttings or seedlings side by side.

Vivosun 48” by 20.75” Seedling Heat Mat and Digital Thermostat Combo Set

The set comes with a heating mat and a digital thermostat, so you do not have to buy another thermostat separately.

Since it has a large warm surface, it can fit four trays. It will ensure that the trays maintain the exact temperature you need the trays to be at.

The digital thermostat maintains a temperature of about 68 to 108 degrees Fahrenheit, and this would be what we are all targeting. You can be assured of a durable product from Vivosun.

Keep in mind that different seeds have different needs. Make sure you offer your seeds ideal temperature, oxygen, light, and moisture.

Consider getting the best Seedling Heat Mats set that has both the heating mat and the thermostat.

The size of a germination tray that is average is usually 10” by 20” and may approximately hold like 72 seedlings.

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