The Pro Grow Heat Mat is a tried and tested essential for any indoor plant growers. It warms the root zone by 5-10 degreees Celsius, so if the ambient room temperature is 12 degrees, the roots would be up to 22 degrees. The warmth provides a bit of extra oomph which helps with seed germination and plant growth - especially during those cold winters!
I purchased this to use in my indoor glass plant cabinet during Winter. Already seeing results from placing my water propagations on it. Warms them nicely and they are happily growing new leaves. Only wish it had an on/off switch so I didn't have to unplug every time not in use. Otherwise very happy.