Backyard Science: Seed Germination Station
Welcome back to Backyard Science Activities!
A series designed to help families explore simple science using everyday items at home.
This activity helps children observe how plants grow from seeds and what they need to survive.
What You’ll Need:
Beans, peas, or lentils seeds (or seeds from the pantry or garden)
Paper towel
Zip-lock bag, clear glass jar, or a clear mini greenhouse container (e.g., a plastic spinach tub)
Water
What to Do:
Soak dried seeds in water overnight (or up to 24 hours). This softens the outer shell and accelerates the sprouting process.
Fold and dampen the paper towel (not soaking wet as standing water can cause the seeds to rot).
Press the paper towel firmly against the inner walls of the zip-lock bag or container.
Carefully slide the soaked seeds between the glass (or plastic) and the paper towel so they remain visible from the outside. Alternatively, you can place seeds inside the folded towel (however they may be more difficult to monitor this way).
Place the station in a safe, warm spot that receives indirect sunlight (like a windowsill).
Observe over several days.
The Science Behind the Test
This introduces plant life cycles and the conditions required for living things to grow. Seeds require three primary elements to sprout: water, oxygen, and the correct temperature.
In this particular test, seeds absorb water and begin to sprout. This is called germination, where a new plant begins to grow.
Extend the Learning:
Younger children:
Ask “What changes do you see each day?”
Draw daily changes.
Older children:
Ask “What do plants need to grow successfully?”
Track growth over time.
Discuss what plants need to survive.
Challenge Idea:
Try placing seeds in different conditions and compare growth. You can try changing:
Light: Compare a jar kept in a sunny window against one placed in a dark cupboard or pantry. Seeds generally don't need light to germinate, but seedlings will stretch and turn yellow (etiolation) if deprived of it.
Water Amounts: Test the difference between damp paper towels, completely soaked/flooded towels, and completely dry conditions.
Temperature: Place one jar in a cool room or the fridge (about 4°C to 10°C) and another in a warmer location (around 21°C to 27°C) to see how temperature affects germination speed.
Pre-Soaking vs. Direct: Soak half of your seeds in water overnight before placing them in the station, and leave the other half dry. Track whether pre-soaking softens the seed coat to sprout faster.
