SubstrateReddMarch 12, 2024 The surface or area in which something lives. Your soil is a substrate for your plant roots, and the top of your soil is a potential substrate for fungus gnats. Similar Terms Medium Base Foundation Soil Growing medium Similar Articles to Read... Autoflower Week By Week Pictures: Life Cycle GuideIn-Depth Journey into Organic Super Soil: All You Need to KnowWhat Are The Best Cheap LED Grow Lights For Growing Cannabis?Choosing the Right Equipment for VPD Monitoring115 Best Weed Strains of All TimeVPD in Hydroponics: Maximizing Growth Potential