Types of Fertilizers
Slow Release
Small granules are mixed directly into the top few inches of the soil. These granules will slowly release nutrients every time soil is watered. A great way to ensure consistent nutrition, however heavy feeding plants and new transplants will require an additional dose of a water-soluble fertilizer. Bone meal is a common slow release fertilizer.
Water Soluble
Water soluble fertilizers appear as a fine powder and are mixed with water then watered into the soil surface. They provide an instant feed but must be applied weekly or bi-weekly in order to provide plants with consistent nutrients. Common formulations are 15-30-15 or 20-20-20, for new transplants choose 10-52-10 or Pro-Mix Root Booster.
Liquid Kelp
This liquid fertilizer contains a high amount of nutrients and micronutrients. As with water soluble forms it will need to be mixed with water and use once per week to maintain a good level of nutrients.
Find out more! We discuss what the numbers mean and how to fertilize different plants here.