The important thing about our fair tests is that only 1 aspect of the test can change, while everything else must stay the same. We are fair testing the different watering conditions for small seeds ranging from no water, to 5mL, to 20mL and right up to 50mL.
What other fair test can you think of for growing a plant and what would be your one change to make it a fair test? The location? The container? The seeds? Who knows...
Damien Ebdon-Walker