What is 'quick release' vs 'slow release' fertilizer?

What is 'quick release' vs 'slow release' fertilizer?

Tracy DiSabato-Aust (Garden Designer and Author) gives expert video advice on: What is 'fertilizer'?; What is the difference between fertilizer and soil amendment?; What are the primary nutrients that plants need to grow? and more...

Quick release is readily available to a plant and is often water soluble. With slow release, the nutrients are released over a period of time, which is sometimes dependent on temperature and the amount of moisture that's provided to the plant.