Athena Nutrients Blended Line StackAthena Nutrients Blended Line Stack Stack is a plant nutrient derived from natural kelp extract, offering a host of benefits for plant growth and flowering. By providing essential nutrients, Stack actively supports healthy plant development, allowing them to reach their maximum genetic potential. Whether applied as a foliar spray or a root drench, Stack also aids in rectifying minor potassium deficiencies, ensuring optimal nutrient balance for plants.