Holland Horticulture

Calcium and magnesium are two of the most important secondary nutrients in hydroponics and soil growing. While often overlooked, they’re vital for plant strength, nutrient uptake, and chlorophyll production. Their availability is largely influenced by the hardness of your tap water, so supplementing correctly with CalMag is essential for achieving strong, healthy crops and bigger harvests.

Plants need CO2 to survive. This element is essential to the process of photosynthesis and without it your plants will cease to grow properly. This reaction happens in the leaf tissue and, with the correct lighting, water and carbon dioxide, sugar is produced to help feed the plant so it can grow

Nitrogen (N) is one of the most vital nutrients during the vegetative stage of plant growth and early flowering. Without it, plants lack the building blocks they need to develop strong roots, lush foliage, and ultimately, abundant fruits and flowers.