Reliable Results: VIVOSUN’s professional heat mat maintains sweet-spot temperatures around 68-86℉(20-30℃) – perfect for seedling starting and cutting propagation – Stable, Uniform Heat – Professional Reliability: For professional-grade horticultural systems, the controller maintains a stable temperature anywhere between 40-108°F (5-42°C) – Zero-Effort Setup and Operation – Works perfectly for spring seedling starts, in the winter or any time your plants need a heat boost