Emerald Harvest Cal-Mag - 3.79L Set of 2 Broad Blue Protect is a

Broad Blue Protect is a highly effective systemic pest control solution formulated to target some of the most destructive plant pests

Application Timing -

it assists with plant maturation and aids in Withstanding stress

This will give you a much larger pH "safety" margin than

magnesium and potassium

Emerald Harvest Cal-Mag - 3.79L Set of 2 Broad Blue Protect is aKeep your plants thriving with Cal Mag, a high quality calcium magnesium supplement from Emerald Harvest. Formulated with high quality ingredients, Cal Mag provides the extra calcium and magnesium needed to support vigorous flowering and heavy yields. It's particularly beneficial for media like coco coir, but any garden can reap its advantages. Cal Mag strengthens plants and helps correct nutrient deficiencies commonly found in various growing media.