EarlyGrow Heated 2-Bay Windowsill Propagator is great to grow a variety of plants, by utilising the 2 bay design. Made out of a robust plastic, with a shatterproof lid, our this 2-bay windowsill propagator is resistant to bumps, knocks and drops. The heated tray also means you can get your plants underway early by instigating germination with a set temperature between 15-19 degrees centigrade.