The nutrients known as secondary are Calcium, Sulfur and Sodium. Now, a lot of you would have probably guessed Calcium because calcium deficiency is extremely prevalent in horticulture. The other two, you probably would not have guessed, but we’ll discuss those in the coming weeks.
Potassium (K) is an essential macronutrient. It is essential for many different processes within the plant. It assists with root growth and development, helps strengthen stems, assists in photosynthesis, helps control disease, the list goes on and on.
The primary nutrients are nitrogen, phosphorus, and potassium (potash); otherwise known as NPK. These three nutrients can drastically shift processes within the plant affecting both health and yield very quickly.