Collection: Fertilizers for Vigor

Organic Potassium Fertilizers

Potassium is critical for plant vigor and is an essential macronutrient in plants. Potassium, or Potash, exists in most types of organic matter and primarily provides a good ionic environment for plant metabolic processes to happen. Plants that are deficient are more susceptible to diseases and frost damage. Potassium plays a key roll in strengthening cell walls, therefore decreasing a cell’s permeability and susceptibility to damage. Too much Potassium can lead to a high pH. Wood ash is often suggested as a source of Potassium, but we do not recommend its use as it is very difficult to know just how much Potassium is in the ash and you can unknowingly impact your soil pH. Find out what your soil's needs are by ordering a soil analysis test kit.

Learn More About Potassium Fertilizers

Recognizing Potassium Deficiencies

Leaves that appear scorched around the edges may indicate a deficiency. Purple spotting as well as yellowing between leaf veins may also be indicators. A soil test is the best way to confirm a deficiency as these symptoms may be the result of other factors including a lack of water, or wind scorch.

Fast Acting Potassium

If you need a rapid solution, try the Ultra Fine Sulfate of Potash (F2300) which is water-soluble and can be sprayed on plant foliage for quick absorption.

Long Term Solutions

Since Potassium ions are highly soluble, they will easily leach from soils with poor soil structure. With this in mind, work on improving soil structure through regular applications of compost and annual cover cropping. Your improved soil structure will slow the leaching of Potassium and other nutrients.