15 km from Horst
MCSubstradd® (a HAVENS-trademark) is produced at a dedicated part of the HAVENS-site in Maashees, Netherlands, only 15 km away from Horst, capital of the european Mushroom-industry.

New improved MCSubstradd® formulas now with spectacular new ECO-PRO Coating for 3% - 5% better yield. Please contact our MCSubstradd® staff.
More and better mushrooms
Dedicated production
Research & Know-How
More information
Orders & logistics
New: MCSubstradd®
MCSubstradd® is a new name for an old and proven product.
Since 2008, MCSubstradd® regroups 2 existing brands for mushroom-supplements: MilliChamp® and Substradd®.
MilliChamp® started in the 1970’s, based on a patent for production and use of delayed-release proteins.
Since it’s start, MilliChamp® has been a reference in the mushroom-industry, famous for its quality, advanced research and innovation.
Substradd® was developped by Mr. Wim Joosten, another pioneer and field-expert in mushroom-supplementation.
In 2008 both brands have joined forces in MCSubstradd®, the new brand-name.
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Dedicated production
MCSubstradd® is produced at a separate part of the large HAVENS-site on the Meuse-river in the south of the Netherlands, where it has been manufactured since the early 1990’s in a 100% dedicated production-unit, from reception of the ingredients right up to filling of the bags or bulktrucks.
Thus, MCSubstradd® combines cost-effectiveness to optimal product-quality.

As part of HAVENS NV, MCSubstradd® can use all available research-facilities within the company. All mushroom-related projects are supervised by HAVENS Research staff.
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Research & Know-How
All MCSubstradd®-products are based on delayed-release protein-technology, developped in the 1970’s and further improved eversince.
Over the years, we have been engaged in numerous experimental- and field-test at the Mushroom Experimental Stations in Horst (the Netherlands; “Proefstation voor de Champignoncultuur”), Roeselare (Belgium; “Proefcentrum voor de Champignonteelt”), Kennett Square (USA) and in the Loire-valley (France).
Since the early 1990's, the production of all MCSubstradd®-supplements is HACCP-certified.

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More information
MCSubstradd®-supplements are made for professional mushroom-growers and/or compost-producers. For more information, contact our MCSubstradd®-staff:
MCSubstradd® Mushroom supplement
Mgr. Geurtsstraat 41
5823 AC Maashees
The Netherlands
Tel. +31 478 638 238
Fax +31 478 638 239
mcs@havens.nl
Mr. Wim Joosten:
Tel. +31 6 5322 3595
Mr. Bart de Leeuw
tel. +31 6 4637 1621
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Orders & logistics
For orders or information about logistics, please contact:
MCSubstradd®:- production & logistics
Mgr. Geurtsstraat 41
5823 AC Maashees
The Netherlands
Tel. +31 478 638 225
Fax +31 478 638 223
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