Indoor Bulb Experiments
would happen to my bulbs if…
While waiting for your garden to grow, you can use the time to experiment
with bulbs indoors. "Forcing" bulbs can bring your experiments
conveniently closer to your classroom. (*Note: Plan Ahead. This
experiment will need 3 full months of cold treatment.)
How to Start?
Selecting Bulbs for Forcing
Choose bulb varieties clearly marked "good for forcing."
Store the bulbs in a cool, dark location (35-55 degrees F) until you're
ready to plant them. (A refrigerator is ideal.) Do not subject the bulbs
to extreme heat or freezing temperatures.
Up Your Experiments
effect does the cold have on the bulbs?
Include a fair test placed
at room temperature.
1. As a
class, have students brainstorm and list all the possible variables
that might affect the bulbs. What research questions do you have about
2. Go through
the list you created. Ask students how they might design an experiment
to test each question on the list.
Scientists design investigations
to answer their questions and test hypotheses. Many of the
questions asked by student and professional scientists lend themselves
to systematic investigations. How do you frame a good question?
Here is a resource to help you.
Plant the bulbs in big enough pots and fill these with potting soil.
the pots are deep place small rocks in the bottom for drainage.
is recommended that you position the bulbs level with
the top of the pot with a small gap between each bulb and the
edge of the pot.
the bulbs with soil and gently pat it down. Label each pot
with the type of bulb, the date planted and the experimental
the pots well and let drain.
Now the bulbs are ready for their
cold treatment experimenting to begin.
to Part 2- Putting Bulbs
into Cold Storage >>