overview
- There are both external environmental factors and internal factors that can affect plant growth.
- These factors can either help stimulate plant growth and development or inhibit it.
- Plants also grow in response to external stimuli and these patterns of growth are called tropisms.
- Tropisms are controlled by plant hormones.
- Fertilizers, pesticides and herbicides are chemicals used to promote plant growth but can be seen to have negative impacts on animals and the environment.