Farewell to Henk IJpelaar: A Pioneer in the Fertilizer Industry

Liz Filmer
23 Jul 2026

Henk IJpelaar, the co-founder and sales director of the renowned fertilizer company Hesi, has passed away, leaving a significant void in the cultivation industry and in the hearts of all who had the privilege to collaborate with him. His legacy in plant nutrition and fertilizer innovation will be long remembered.


A Passionate Journey into Plant Nutrition

Henk’s illustrious career in plant nutrition began three decades ago when he teamed up with his partner, Siglinde. By merging Siglinde’s scientific expertise in laboratory work with Henk’s vision and entrepreneurial spirit, they propelled a project born from a genuine desire to help growers achieve outstanding results. This commitment to quality and innovation paved the way for HESI, a brand that became synonymous with excellence in cultivation fertilizers and additives.

Building a Legacy of Professionalism and Warmth

HESI, named after the partnership of HE**nk and SI**glinde, quickly became an international benchmark for quality fertilizers. Henk embodied the best attributes of the cultivation industry: professionalism, a forward-thinking vision, and a warmth of character that transformed every trade show or casual conversation into a memorable experience.

Distributors, industry colleagues, and growers worldwide have expressed their heartfelt condolences to Henk’s family, friends, and the entire Hesi team during this difficult time. Notably, leading companies have recognized his contributions to the industry and the personal touch Henk brought to his work.

Honoring Henk’s Legacy at Hesi

The Hesi team is committed to honoring Henk's legacy by upholding the values of quality, dedication, and commitment that he championed from day one. His influence in the cultivation and fertilizer sector will continue to inspire future generations of growers and industry professionals.

The editorial team at Soft Secrets joins his loved ones in mourning the loss of a true pioneer in the fertilizer industry. Thank you, Henk, for your years of dedication and for every moment shared. Rest in peace. 

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