Hesi Boost
Updated 18 Oct 2026
Many plants need a trigger to switch from their growth phase to start their blooming phase. This can be external stimuli such as light, temperature or simply after the passage of time, but also nutritional enhancement. Boost contains a large number of natural sugars, minerals, enzymes and fruit acids from plant extracts and fruit extracts that have a strong effect on flowering.
Usage & Instructions
Watering: 20 ml per 10 L. Foliar spray: 10-20 ml per 10 L. Start at the end of the growth phase and continue through flowering (once at the start of flowering, then 1-2 times per week). Combine with fertilisers and other boosters.
Product Specifications
Description
Hesi Boost is an organic bloom stimulator with added PK (1-1), based on plant extracts from sugarcane (Saccharum officinarum) and beet (Beta vulgaris). It is applied at the end of the growth phase to encourage flowering and throughout flowering to maintain flower quality and density. Suitable for soil, coco and hydro, and as a foliar spray.
Available variants
Boosters
All products in the Boosters range.
Hesi CalMag
Hesi CalMag is a liquid calcium and magnesium supplement (5.0% CaO, 7.5% MgO, NPK 5-0-0) with iron chelate and molybdenum. It replenishes minerals missing from soft, demineralised or reverse-osmosis water, supporting strong cell walls and green leaves.
Hesi Hesilicio
Plants need more than just water and nutrients – they need power to withstand everyday challenges. Whether drought, pests, or fluctuating temperatures. That is why we are proud to add a brand new product to our range: Hesilicio. This new booster contains silicon and has been specially developed to strengthen the health and resilience of your plants.
Hesi PowerZyme
Hesi PowerZyme is a plant booster designed to optimise the quality of your plants' substrate. Even the best developed root system is affected by the quality of the substrate. The roots need a high oxygen content and an environment that is rich in microorganisms and free from rot. The main ingredient of PowerZyme is a biotechnologically derived extract of enzymes obtained from a Trichoderma fungus. These enzymes ensure that small dead plant parts consisting of cellulose are immediately broken down into their essential parts. The components of the cellulose are sugar molecules that are used as food by both the plant and the microorganisms.
Hesi Root Complex
Hesi Root Complex helps young plants get started through their plant life journey. It relieves stressed plants and simplifies your life as a gardener. With Root Complex, young plants experience an optimal and fast consumption of plant nutrients through strong roots and thick stems. The better these transport routes are developed, the more the plant can absorb. Root Complex alleviates stress situations of plants, e.g. due to a change of location or repotting. It helps the plant to quickly adapt its internal structure to new conditions. Root Complex ensures optimal communication between the root system and the leaves, resulting in balanced growth and a fast-acting defence system.
Hesi SuperVit
SuperVit is a bio-stimulant for plants that can do extraordinary things with just a few drops. It is magical how it can improve the energy level of plants, strengthens vitality and resistance to inhibiting factors. SuperVit improves the absorption and processing of nutrients from the soil. It provides the plant with important components for metabolism. The ready-made building blocks in SuperVit allow the plant to skip certain steps of its internal metabolism. This saves time and energy. The saved energy and time can be used for better development. The vital substances are also growth promoters for the microorganisms in the substrate. This creates strong networks between the plant, the substrate and the microorganisms in it.
Where to Buy
More from HESI
Other products by HESI.
Hesi Bio Bloom
Bio Hesi Bloom is the flowering fertiliser of our new 100% natural, organic and vegan range. This new fertiliser meets all requirements for biological and organic cultivation, and can be recognised by the "Bio Hesi" name with the corresponding "100% natural", "vegan" and "organic farming" logo's. The raw materials used in products of this line are sustainably sourced from byproducts of food production, and 100% vegan. An example is grape pulp derived from byproducts of wine production.
Hesi Bio Grow
Bio Hesi Grow is developed with love and care, for all who want to feed crops organically, with a 100% natural product. Fully formulated with fruit and plant extracts, so it is also totally vegan. Bio Hesi's ingredients do meet all requirements to be fully permitted for organic and biological farming. The magnesium/calcium salts, as well as all the phosphates and trace elements naturally occur in soil and compost as well.
Hesi Bloom Complex
Bloom Complex is a NPK complete fertiliser with all macro and micro nutrients and additional valuable additives. Bloom Complex ensures that your plants are fully productive during the flowering period. Flowers serve the reproduction of the plant. The change from growth to flowering requires a complete reorganisation of the metabolism. The built-in pH corrector ensures optimal pH values and is thus gentle on the plants. Perfect for your plants in-house, in the garden or on your terrace. Ideal for permanent use, even in smaller pots. It keeps the root environment optimal and the soil vivid with rich microflora.
Hesi Coco
Hesi Coco fertiliser is a complete mixture with all the nutrients a plant needs for its development. The special properties of the coco substrate are fully met, regardless of whether it is used as fibre in hydroponics or as coco pulp in pot culture. Coco-medium can absorb certain minerals, this is taken into account in the fertiliser. Coco as a medium does not contain any nutrients by itself, which makes permanent fertilisation necessary. The change from growth to flowering requires a radical reorientation of all parts of the plant. The composition of our Hesi Coco is designed especially to fulfil the needs of your flowering plants in this medium. This way, your plants grown on a coco medium will flourish and blossom throughout their plant-life.
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