Holland Horticulture

If you’re aiming for a bountiful Christmas harvest, the countdown has begun and with just under 100 days to go, now is the perfect time to start germinating seeds or rooting your clones. At Holland Horticulture, we help growers across the UK get the most out of every grow cycle with trusted advice and proven products. Whether you grow in soil, coco, or full hydroponic systems, this guide walks you through how to successfully propagate seeds and cuttings for a productive and healthy crop.

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