All plants, flowers, vegetables, and fruits all start as

When planning an investigation, you should first make an observation, ask a question, then form a hypothesis for the investigation. 

Plants need only water and soil in order to grow. 

What do plants need in order to grow? 

What will happen to a plant if it does not get all the needs it needs in order  to grow?

When you plan and conduct an investigation, you should not record your observations.