Hesi Hesilicio
Plant aids
Hesi Hesilicio: Silicon is an essential element that plays a crucial role in the strength, growth and resilience of plants. However, pure silicon cannot be absorbed by plants in its solid form. It must first exist as orthosilicic acid - a soluble form of silicon.
Hesilicio contains 3% orthosilicic acid in colloidal form, so it can be easily absorbed by plants through both the roots and leaves. This highly effective booster supports stronger cell walls, improved nutrient absorption and increased resistance to stress, pests and disease.
- Stronger cell walls in leaves and roots
- Greater resistance to drought and infections
- Improved nutrient absorption
Characteristics
Protective effect Strengthens cell walls & increases stress resistance
- Insecticide → Agent against harmful insects (e.g. aphids, thrips, whiteflies).
- Acaricide → Agent against mites and spider mites.
- Fungicide → agent against fungal diseases (e.g. mildew, botrytis, rust).
- Plant protection products = preparations that protect plants from pests, diseases or weeds.
- Plant additives = Support soil life or nutrient uptake without being fertilizers or pesticides themselves.
- Plant strengtheners = Increase the plant's resistance to stress, pests or diseases.
Application
Please note the safety instructions on the product
Product data sheet & information from the manufacturer
Safety data sheet
Couldn't load pickup availability
Pickup available at Zugmatt 1
Usually ready in 2-4 daysIn stock! Ships in 2-5 business days
Shipping by Swiss shipping company, we are constantly looking for the cheapest option for you | Parcel shipping number will be stored in your account
Customer service without AI | If you have a question, call us or contact us in writing, we will be happy to answer you
Hesi Hesilicio
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Everything about shipping
We ship all orders as quickly as possible - usually within 2 to 5 working days.
In exceptional cases (e.g. due to delivery delays or circumstances beyond our control), the delivery time may take longer. In such cases, we will inform you immediately by email.
Shipping takes place with a Swiss shipping company. We are constantly looking for the cheapest option for you.
The shipping costs are borne by the buyer. The required packaging material is already included in the shipping price.
-
Support Team
Personal contact is important to us.
We advise you ourselves – honestly , directly and with heart .
This sometimes takes a little more time, but you get faster, clearer answers in return.Do you have questions about an order or need help with calculations?
Just get in touch – or come by, we look forward to seeing you. -
FAQs
You can already find many answers in our FAQs - maybe your question is already there?
We update them regularly with your feedback.
-
Contact us
Your go-to for fertilizers and plant boosts
since 1996
How HESI came about
The story
A German woman and a Dutch man fell in love with plant care. Siglinde was a scientist, working on various projects in a laboratory. One of her side projects was the development of a high-quality fertilizer. For this passion project, only the finest ingredients were considered, and no expense or effort was spared. The same recipe, with the same quality standards, is still used today. Their friends, who were involved in cultivation, were not achieving the desired results. These cultivators were challenged and desperately needed a high-quality fertilizer. With their passion, experience, and motivation, they embarked on a journey together and founded Hesi Plantenvoeding. They said goodbye to their old lives and never looked back.
"What should we name our company?" Henk asked. After some brainstorming and discussion, they realized it was a passion for both of them, so why not combine their names? Thus, the name "HESI" was born: a combination of the first names of the two company founders.
HE stands for Henk and SI for Siglinde.
High-quality fertilizers
Produced by HESI
Plant and soil additives, blended, filled, and packaged in our own production facilities in Kerkrade, the Netherlands. We've been doing this with love and passion since 1996.
Thorough research into the mysteries of plant metabolism has enabled HESI to develop an optimally balanced composition for every phase of plant life. The result is a range of fertilizers for every developmental stage, but universally applicable, rather than specific fertilizers for each individual plant species. Additional vital substances such as vitamins and amino acids allow the plants to boost their energy levels. This makes growing house, garden, and patio plants a true pleasure.
Hesi is a thriving, internationally operating company with a global reach across Europe, the Americas, Asia, and South America, characterized by a personal touch and a down-to-earth approach. Plant lovers can find the nearest Hesi shop in our Retailers section.
2025
To this day
Hesi has helped more than 1,000 companies and individuals with its solutions. Our secret? Listening carefully and exceeding every customer's expectations with genuine ingredients, in-house production, and personal customer contact. The inspiration for founding the company—the smiles on their friends' faces—is what has driven Henk and Siglinde all these years.
Check out all Hesi products
