Optimize Seed Germination & Plant Growth: These 10″x20.5″ seedling heat mats provide consistent, even heating at 75°F to 95°F (24°C to 35°C). Perfect for winter seedlings, hydroponics, and cold-weather gardening.
The humidity card itself is reusable. When the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may faint. Then, you can replace the card. Indicator Changes Blue(Dry) to Pink(Humid).
