Step 3: Provide Proper Warmth and Light Once planted, seeds rely on consistent warmth and bright light to grow strong and healthy. Seed-starting heat mats gently warm the soil, helping seeds germinate faster and more uniformly—especially heat-loving crops like tomatoes and peppers. High-output LED and T5 grow lights deliver balanced, bright light that prevents seedlings from becoming weak or leggy. Germination stations and complete lighting systems make setup easy for beginners while offering precision for experienced gardeners. Together, proper heat and lighting create an ideal indoor growing environment, producing sturdy, compact seedlings that are ready to thrive when transplanted outdoors.