Emerald Harvest Cal-Mag Seaweed & Kelp forming a symbiosis with the

forming a symbiosis with the plant's roots

When plants have reached their peak of vegetative growth and are starting to show first signs of flowering

Easy to use for strong

Soil Recycling old soil

Emerald Harvest Cal-Mag Seaweed & Kelp forming a symbiosis with theEmerald Harvest Cal Mag keeps your plants productive and green in any growing medium with our top quality calcium magnesium supplement. Keep your plants productive and green with Cal Mag, a calcium and magnesium supplement from Emerald Harvest. Containing top quality ingredients, Cal Mag is designed to nourish crops with extra calcium and magnesium and create the right conditions for abundant flowering and a heavy yield by utilizing its 2 0 0 NPK.