Durable Seedling Heat Mat for Seed Starting 10" x 20.75", 2 Pack Waterproof Warming Mat Plant Heating Pad for Seed Germination, Indoor Growing, Hydroponic, Greenhouse, ETL Listed

Maintains a good temp to help seed germination. Cost is negligible. Doesn't have a thermostat but I used an instant read baking thermometer to verify heat output. Temps stay within a degree or two. I've noticed a definite improvement in seed germination. I just ordered the same set of two mats for my daughter!

These seedling heat mats work exactly as described. They warm evenly, are very sturdy, and fit perfectly under standard trays. I noticed quicker and more consistent germination compared to years without a mat. The waterproof are easy to wipe clean. Great value for the quality.

Note - I did not use these for seed germination yet. I used one for resin crafting - the other will be used for seed starting when it's not 5000 degrees outside here in Florida. The heat level is consistent, but not variable. There are no switches or knobs to adjust the base setting. It plugs into a standard outlet. The mat itself is a smooth matte vinyl, so I did cover it with parchment paper before I used it for resin in order to avoid making a huge mess. It really helped remove the stubborn bubbles in my resin dice. There is a warning that this, like most electronics, should not be submerged or exposed to standing water for a long period of time. Make sure you are using something with drainage holes OR have your seedlings otherwise contained so the water doesn't get on the mat. Anything that does spill wipes off quickly. This is about the size of a large desk mat and is relatively thin and non-obtrusive. The cord does not have a swivel head, so placement is important if you need things to stay level. It would be a great modification if they made these with a rotating/swivel outlet plug, but alas. The vinyl seems sturdy enough, but I do foresee it cracking down the line. Just be careful and avoid water intrusion.

Can only give 4starsat this time because only used them for 3days. But heat is even across bottom of trays and consistent

I got these to start seedlings and they are the best. Always the correct temperature and I get seedlings started faster. I even use them for propagating cuttings.

Working well! Seedlings are growing!

This review is strictly from a sourdough bulk fermenting perspective. These run hot, esp without having a temp controller on them, but I bought them from the Black Friday sale for a good price. I have a long double thickness towel I put on the table to protect it from the heat, and then I use another towel folded into fourths on top, to moderate the dough temp when letting my sourdough bulk proof, and will occasionally use another double layer on top, making 6 layers so the dough doesn't overheat The two will be good to use when I'm making large batches for my bake days. NOW..... if you're using this for starting seeds, these are going to fry your seedlings in a matter of a short time! These are way too hot to put a seed tray on! Don't do it! OR....buy a temp controller to plug it into, to save your plants!

Worked perfectly for heating up my seeds. I keep them going for weeks. Waterproof and just warm enough. Some daisy chain while others stricktly plug in so if you get the plugin make certain there are a ton of plugs available. Perfect for my temporary seed starting spot for a few months.

É incrível! Em 1 semana de uso contínuo, sementes minhas que não tinham brotado ainda e outras cujo crescimento estava estagnado evoluíram muito! Tive só que aumentar a frequência de umidificar com spray com água as plantas, porque o solo secou bem mais rápido com o tapete.

La alfombrilla se autoregula en temperatura y la puedes usar de día y noche . En mi caso la use 21 días seguidos y sin problema las semillas germinaron súper rápido y todas se lograron.

Worked well for me last winter.

I use these warming mats to grow seedlings for my winter home hydroponics. They were hotter than I anticipated but not enough to damage anything. I was pleasantly surprised that the electrical cords were reasonably long. I didn't have to use an extension. I would buy them again!

Very handy for many things!