The best way to start seeds indoors is to give them clean soil, steady moisture, warmth, and strong light. You need all four of these things working together for your seeds to sprout well. Miss any one of them and your seedlings will struggle from the start.
I spent three seasons testing different setups in my home before I found what works. My first year I tried growing tomatoes on a windowsill. Those seedlings stretched into weak, leggy plants that flopped over within weeks. They just couldn't get enough light through the glass.
Switching to a simple $30 shop light changed everything for me. I hung it about two inches above my seed trays and ran it for 16 hours each day. The seedlings grew short and stocky instead of tall and weak. That one change made the biggest difference in my results.
Your indoor seed starting method matters less than your light source. Seeds don't need light to sprout since they germinate fine in the dark. But the moment those first tiny leaves pop up, they need intense light right away. Without enough brightness, seedlings stretch tall and thin as they search for any light they can find.
You should start with a sterile soilless mix rather than dirt from your yard. Garden soil brings fungal spores, weed seeds, and pests that attack tender seedlings. A basic peat or coir-based mix gives your seeds a clean start. You can find these mixes at any garden center for just a few dollars.
Plant your seeds at about twice their width in depth. Tiny lettuce seeds barely get covered at all. Larger squash seeds go about half an inch down into the mix. Keep your soil between 65-75°F (18-24°C) for most veggies. Peppers and tomatoes like it warmer, closer to 80°F (27°C).
Getting the moisture right trips up many new growers. Your soil should feel like a wrung-out sponge. You want it damp but never soggy or dripping wet. Cover your trays with plastic domes until you see sprouts. Then take off those covers right away to stop mold from growing.
Bottom watering works best after your seeds come up. You fill a tray beneath your pots and let the soil soak up water from below. This keeps the leaves dry and trains roots to grow downward. Your seedlings will be much stronger this way.
Successful seed germination takes patience more than fancy gear. Check your trays each day and move your lights up as seedlings grow taller. Don't give in to the urge to water too much. Most failures come from drowning seeds or starving them for light. Both problems are easy to fix once you know what to watch for.
Read the full article: Starting Seeds Indoors: A Complete Guide
