Step-by-step tutorial
Step 1
Gather your materials.
Step 2
Cover the seeds with water. Soak them overnight. (Soaking the seeds will help them sprout faster.)
Step 3
Fold the paper towel in half and cut it so that it fits in the Ziploc® brand sandwich bag.
Step 4
Dampen the towel. Gently wring it out so that it’s still damp but not dripping.
Step 5
Place the damp towel inside the bag.
Step 6
Place a few seeds on the paper towel inside the bag, an inch or two from the bottom.
Step 7
Lay the bag on a sheet of paper and sketch a house shape around it. Cut out the house shape, then cut out a window for the bag to peek through. Make sure the window is large enough to see all your seeds, with room to grow! If you want, draw on the greenhouse with markers or decorate it with paper cut-outs.
Step 8
Tape the bag and frame it to a window, with the seeds facing inside so that you can see them sprout. Keep track of how your seeds grow with our Observation Journal Printable! If you like, create more greenhouses and let them grow under different conditions or locations to observe what happens. Print additional journal pages to track their progress.
Learn more
When the seeds have sun and water, they sprout. But do they need both sun and water? Make multiple window greenhouses and test it out! What happens if you place the seeds in a dark room with water? Or in a sunny spot without water? Or even in a dark place with no water? What do you see?