Hesi

The Hesi range at Plant & Flower

Hesi fertilizers are known for their well-designed formulations and ease of use — ideal for growers seeking reliable results without complicated feeding schedules. Hesi Plantenvoeding is a Dutch company based in Kerkrade that has developed high-quality plant nutrition products for hobbyists and professional cultivators for many years. The brand stands out through a compact product line that nonetheless covers every stage of the plant cycle — rather than dozens of different bottles, Hesi offers a clear system where each product does exactly what it promises. At Plant & Flower, your Belgian grow shop since 2011, you'll find the complete Hesi catalogue with dedicated lines for each substrate.

The colour code system and base formulations

The philosophy behind Hesi centres on supporting the natural metabolism of plants. Their formulas contain not just standard nitrogen, phosphorus, and potassium, but also amino acids, vitamins, and plant sugars. These additional components mean plants spend less energy synthesising building blocks themselves — the outcome is faster growth, improved flower development, and heightened resistance to stress. The intuitive colour-coding simplifies selection: green for soil, orange for hydroponics, brown for coco.

Growth and bloom on soil and coco

For the vegetative phase, Hesi TNT Complex 1 L delivers all necessary macro and micronutrients for vigorous growth — the TNT name refers to the explosive growth young plants show when receiving this nutrition. Once plants switch to flowering, Bloom Complex 1 L delivers the extra phosphorus and potassium needed for dense flowering, while added vitamins and amino acids support flower formation. For coco, use Hesi Coco 1 L, specifically formulated to compensate for the buffering properties of coco fibre.

Hydro lines for inert systems

Hydroponic growers have Hydro Growth 1 L for the vegetative phase and Hydro Bloom 1 L for flowering. These formulas are tuned for inert media (rockwool, clay pebbles) where nutrients must be immediately available. Always combine with regular pH/EC monitoring: target pH 5.8-6.5 depending on substrate, and track EC drift after each reservoir change.

Root stimulator, boosters and starter kits

Beyond base nutrients, Hesi offers several targeted supplements. Hesi Roots 1 L stimulates young roots from day one — vitamins, amino acids and plant sugars help stressed plants recover from transplanting. SuperVit 50 ml is the most concentrated product in the line: just a few drops per 10 L of water suffice to activate the hormone system and boost overall vitality. For beginners or those who want to try the full range in one purchase, the Starterbox Soil bundles all essential products for a complete cycle on soil.

Dosing and practical tips

• Starting dose: 50-70 % of recommended rate, then gradual increase
• Target EC soil: 1.2-1.6 mS/cm depending on phase
• Target EC hydro/coco: 1.4-2.0 mS/cm depending on phase
• Target pH: 5.8-6.5 (less critical on soil due to buffering)
• Storage: bottles in dark place, shake before each use
• Nutrient solution: mix fresh, use within a few days

FAQ - Frequently asked questions about Hesi

Browse the complete Hesi range at Plant & Flower and enjoy fast delivery throughout Belgium. Our team gladly advises on choosing the right line for your setup and experience level.