How to Grow Bean Seed in Cotton & Water


Watching bean seeds grow into to a bean plant is a common science project for young children. Bean seeds that are placed in a jar with moist cotton germinate rapidly. The cotton retains the moisture for the seeds and provides just enough for them to germinate. It also keeps the seeds from getting too moist and rotting. Once germinated, the seedlings can be dissected if it's a science experiment, or they can be transplanted right into your garden.

Step 1

Moisten enough cotton balls to cover the bottom of a cup or plastic bag. The cotton should be damp but not dripping.

Step 2

Place the cotton balls at the bottom of the cup or plastic bag.

Step 3

Place the number of bean seeds you want to germinate on top of the cotton.

Step 4

Close the plastic bag or cover the cup with plastic wrap. Place the bags or cups in a sunny window and watch for germination.

Step 5

Transplant the germinated bean plants into your garden if you want to grow them to mature size.

Things You'll Need

  • Plastic cups or bags
  • Cotton balls
  • Water
  • Bean seeds
  • Plastic wrap


  • Gardening Australia: Fact Sheet: Growing Sprouts
  • Soil Experiment Growing Pinto Beans
  • Utah Education Network: Jack and the Beanstalk - Plant a Bean and Watch it Grow
  • Parenting Times: Home Science Experiment - Germinating Bean Seeds
  • Place of Our Own: Window Garden
Keywords: grow bean seeds, cotton and water, germinate beans, beans in cotton, sunny window

About this Author

Robin Gonyo has been writing for several years now. She has a deep love for gardening and has spent a vast amount of time researching that subject. Previously she has written for private clients before joining Demand Studios. She hopes to share her knowledge with others through her writing.