This easy seed-starting setup uses things most people already have on hand and works surprisingly well for starting plants indoors. Cardboard egg cartons act as planting trays, while a clear plastic bag creates a warm, humid environment that helps seeds sprout quickly—no special equipment needed.
How It Works
The egg carton holds small amounts of soil and keeps each seed separated. When covered with a plastic bag, moisture is trapped inside, creating a mini greenhouse effect. This steady humidity encourages consistent germination and keeps the soil from drying out too fast.
Because the cartons are lightweight and compact, they fit perfectly on a windowsill where seedlings can get natural light.
How to Set It Up
Fill each egg cup with potting soil and lightly press one or two seeds into each cell. Water gently so the soil is evenly moist but not soggy. Slide the entire carton into a clear plastic bag and loosely close the end to hold in humidity while still allowing a bit of airflow.
Place the cartons in a bright spot indoors, ideally near a window.
Care Tips
Check moisture every few days. If condensation is heavy, open the bag slightly to prevent excess moisture. Once seeds sprout, gradually remove the plastic so seedlings can adjust to normal air.
When it’s time to transplant, the cardboard cartons can be cut apart and planted directly into the soil, where they will naturally break down over time.
Why This Method Works So Well
This approach keeps costs low, reuses everyday materials, and gives seeds exactly what they need to germinate. It’s especially useful for starting herbs, flowers, and vegetables early in the season without taking up much space.
Simple, effective, and easy to repeat year after year, it’s proof that growing plants doesn’t require fancy tools.
