STUTTGARTER

What STUTTGARTER does

Stuttgarter Humusdünger Wilhelm Riegraf GmbH & Co. KG is a third-generation, family-owned German producer of natural soils, substrates, fertilizers, bark mulch, playground safety surfacing, and grass seeds, headquartered in Remseck am Neckar in the Stuttgart region. Founded in 1924 and operating with approximately 74 employees under the GmbH & Co. KG legal form, the company blends, packages and distributes horticultural inputs both under its own brand portfolio — including Nährhumus B1, Gartensubstrat, Rasensubstrat Premium, Rhododendronerde, BIOTERRA, Vulkatree, Vulkaplus, Lavadrän, Rindenmulch, Fallschutzbelag and Bellgreen grass seeds — and via resale of third-party specialty brands (CUXIN DCM, TerraCottem, OSCORNA). An on-site photovoltaic system supplies part of the facility's electricity, and an owned truck fleet handles direct delivery to customers.

The company serves four primary segments: landscape gardeners, garden centers, municipalities, and private individuals, with the Stuttgart region as its geographic perimeter. Distribution is direct via the owned fleet rather than through third-party logistics, which functions as a margin and service-level lever for bulky, low-margin bulk goods. Revenue mechanics are unit-based sale of physical products, with no subscription, SaaS, or platform layer, and pricing is set per unit of substrate/fertilizer/seed rather than via enterprise contracts. The legal form and family ownership under managing directors Alexander and Ingeborg Riegraf indicate a closely-held, conservatively financed business with no external investors, parent group, or disclosed financial figures.

Strategically, the portfolio is being repositioned around peat-reduced and peat-free substrates, organic (BIO) products, and specialty volcanic and drainage substrates, which read as defensive modernization against tightening German peat regulation and ESG-driven procurement criteria in municipal and landscaping channels rather than as aggressive expansion. No M&A, external funding, geographic expansion beyond the Stuttgart region, or AI/technology capability is disclosed.

Name

STUTTGARTER

Legal name

Stuttgarter Humusdünger Wilhelm Riegraf GmbH & Co. KG

Website

https://stuttgarterhumusduenger.de

Company type

Private

Founded year

1924

Operating status

Operating

Short description

Stuttgarter Humusdünger Wilhelm Riegraf GmbH & Co. KG is a 100-year-old, family-owned German producer of soils, substrates, fertilizers, bark mulch, playground safety surfacing, and grass seeds serving landscapers, garden centers, municipalities, and private customers in the Stuttgart region via direct delivery.

Ownership category

akta.pro rank

Product category

Horticultural Soils and Substrates Manufacturing

NAICS

Fertilizer and Compost Manufacturing (32531)

akta.pro primary industry

Compost & Soil Amendment Product Manufacturing/Blending (Value-Added Organics) (BPALAEAH)

akta.pro secondary industry

Humic & Fulvic Substances (Humates) (AFABADAC)

Keywords

• Soil and substrate manufacturing
• Natural horticultural substrates
• Bark mulch products
• Playground fall protection surfaces
• Grass seed supply

Headquarters

HQ city

Remseck

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Technology or R&D

Revenue model

1. Product Sales - Soils, Substrates, Fertilizers, Grass Seeds: Revenue generated from manufacturing and selling naturreine (pure natural) soils, substrates, fertilizers, bark mulch, playground safety surfaces, and grass seeds. Products sold in various formats including 50L sacks, 70L sacks, bulk, and BigBag.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Stuttgarter Humusdünger manufactures and supplies natural soils, substrates, bark mulch, playground fall protection surfaces, fertilizers, and grass seeds. Products are produced at the Remseck am Neckar facility using electronically controlled production systems powered by the company's own photovoltaic installation, and are sold directly to landscape gardeners, garden centers, municipalities, and private individuals across the Stuttgart region via the company's own truck fleet.

Product overview

Stuttgarter Humusdünger is a 100-year-old, third-generation manufacturer and supplier of natural soils and substrates. The company operates as a traditional production facility with modern electronic-controlled production equipment and owns its own truck fleet for flexible delivery. The product portfolio comprises four main categories: (1) Erden und Substrate - premium soils and substrates including Nährhumus B1, garden substrates (Typ 20, Typ 30 in peat-free and peat-reduced variants), lawn substrates, rhododendron soil, volcanic substrates (Vulkatree, Vulkaplus), drainage materials (Lavadrän, Blähton), and green roof substrates; (2) Rindenmulch und Fallschutzprodukte - bark mulch products (0-20mm, 15-40mm, pine decorative bark) and playground safety surfaces (Fallschutzbelag, DropPotect); (3) Dünger - fertilizers including CUXIN DCM branded products (lawn fertilizers, soil activators, specialty fertilizers for roses, rhododendrons, tomatoes, orchids), OSCORNA fertilizers, and TerraCottem universal growing medium; (4) Rasensamen - grass seeds under the Bellgreen brand including sports turf (TOP SPORTRASEN RSM2.3), regeneration turf, and shade grass varieties. The company also offers specialty products like BIOTERRA organic soils, grave covering soils, andbaumsubstrate (tree substrates).

Differentiator

Problem solved

Functional benefit

Products and services

• Nährhumus B1 (Nutrient Humus) RAL quality-certified high-quality nutrient humus based on bark humus, mushroom compost, and white peat. Designed to improve heavy soils with organic matter, enhance biological activity, and create healthy soil conditions for powerful plant growth in landscaping applications.
• Gartensubstrat Typ 30 (torffrei / torfreduziert) — Garden Substrate Type 30 Professional-grade garden substrate available in peat-free and peat-reduced variants for high-demand landscaping (GaLaBau) applications.
• Rasensubstrat Premium (torfreduziert) — Premium Lawn Substrate Peat-reduced premium lawn substrate formulated for establishing and maintaining lawns in professional landscaping and garden applications.
• Rhododendronerde — Rhododendron Soil Specialized acidic soil substrate formulated for rhododendrons and other acid-loving plants.
• Blumen-/Balkonerde — Flower and Balcony Soil Soil mix for flower beds, container plants, and balcony gardening applications.
• BIO Blumen-/Pflanzerde (torffrei) and BIOTERRA Bio Blumenerde (torffrei) — Organic Peat-Free Soils Peat-free organic flower and planting soils, including the BIOTERRA sub-brand, for organic gardening applications.
• Vulkatree Plus 0-16 mm and Vulkaplus intensiv 0-12 mm — Volcanic Substrates Volcanic mineral tree substrate (Vulkatree Plus) and intensive green roof substrate (Vulkaplus intensiv) with enhanced growing and drainage properties for tree planting and intensive roof garden applications.
• Lavadrän 2-8 mm — Lava Drainage Material Lava-based drainage material for improved water management in planting substrates and green roof systems.
• Grababdeck-/Friedhoferde — Grave Covering and Cemetery Soil Specialty soil for grave maintenance, cemetery landscaping, and decorative grave covering applications.
• Rindenmulch (Bark Mulch) — 0-20 mm and 15-40 mm grades Bark mulch products in fine (0-20 mm) and coarse (15-40 mm) grades for ground cover, weed suppression, moisture retention, and decorative applications in gardens and landscapes.
• Fallschutzbelag — Playground Fall Protection Surface Fall protection surface material for playgrounds and public facilities, supplied for safety-compliant playground construction and maintenance.
• CUXIN DCM Fertilizers (Resale Range) Resale range of CUXIN DCM branded specialty fertilizers, including Rasendünger Spezial (special lawn fertilizer), Bodenaktivator (soil activator), and Orgasan Universaldünger (universal organic fertilizer), covering professional lawn care and soil biological activity improvement.
• TerraCottem UNIVERSAL — Soil Conditioner with Water-Retention Polymers Universal growing medium with water-retention polymers for improved plant establishment, used as a soil conditioner across planting applications.
• Bellgreen Grass Seeds — Sports Turf and Shade Varieties Bellgreen-branded grass seed mixtures including TOP SPORTRASEN RSM2.3 (premium sports turf meeting RSM2.3 quality standard) and SCHATTENRASEN (shade-tolerant mixture), supplied for sports fields, regeneration, and shaded lawn areas.

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Klasmann-Deilmann: German-headquartered global leader in growing media and substrates (incl. peat, peat-reduced, and peat-free lines) for professional horticulture and landscaping — directly comparable product portfolio, customer base (landscapers, municipalities), and substrate/blending manufacturing model.
• Gramoflor: German manufacturer of professional peat-reduced and peat-free substrates and soils for landscaping and horticulture — comparable product mix, German market focus, and target customers (Garten- und Landschaftsbau).
• Hawita: German producer of growing media and substrates (Hawita brand) for horticulture, landscaping, and retail garden center channels — directly comparable substrates/soils business serving both professional landscapers and consumer garden-center customers.
• Floragard: German consumer and professional substrate/soil brand (part of Klasmann-Deilmann group) selling potting soils, lawn substrates, and specialty soils through retail garden centers — comparable product categories and distribution model.
• Brill Substrate: German manufacturer of substrates and growing media for professional horticulture, with peat-reduced and peat-free product lines — directly comparable substrate manufacturing operation serving landscaping and horticultural customers.
• Patzer Erden: German producer of substrates and growing media for professional horticulture (Einheitserde/Patzer brands) — directly comparable peat-based and peat-free substrate manufacturing targeting landscapers, municipalities, and growers.
• ASB Grünland: German manufacturer of substrates and growing media for landscaping, sports turf, and green roof applications — comparable specialty-substrate portfolio, especially around green roof (Vulkaplus analog) and sports turf substrates.
• Stender AG: German producer of substrates, growing media, and soils for horticulture and landscaping — comparable substrate manufacturing operation serving German professional and retail channels.

Others

• CUXIN DCM: German organic fertilizer and soil amendment brand that Stuttgarter resells (lawn fertilizer, soil activator, universal organic fertilizer) — adjacent supplier/partner relationship rather than direct substrate competitor.
• OSCORNA: German natural fertilizer brand resold by Stuttgarter as part of its Dünger range — comparable product category but functions as a supplier/partner rather than direct substrate competitor.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about STUTTGARTER