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Hendrikus Organics

Tina C. Peterson & Hendrikus Schraven Phone: 425-392-9977 or 1-888-828-9977

  Fax: 425-392-4335

PO Box 1289 Website: www.hendrikus.com

Issaquah WA 98027 Email: [email protected]

Service Categories: structural commercial school

landscape residential golf course


Landscape Dynamics & Organic Garden Care Services/ The Hendrikus Group offers full service organic garden care, from award-winning environmental landscape design and installation to all organic maintenance and pest / disease control. Hendrikus is a forerunner in the use of microbial activators, an originator in the development of compost tea used for landscaping, and the pioneer of Integrated Organic Management.™

What is your definition of Integrated Pest Management (IPM)?

We use an approach we call IOM™ or Integrated Organic Management™. IPM allows the use of synthetics or chemicals in addition to organics, which we do not. IOM™ utilizes or integrates only truly organic products, including fertilizers, micro nutrients, biological catalysts, essential oils, activators, activately aerated compost tea based on a solid approach that gives prime attention to soil health and disease immunity through plant health.


Is pest management performed on a specific schedule?

Our IOM™ approach adapts in response to the health of a project. Our program covers conditions from extreme stress with specific treatments and more frequent visits, to basic seasonal service to sustain healthy gardens. “Pest management” in landscape applications is minimal when soil and plants are in a state of health.

How are pest problems identified?

What practices do you use to prevent and/or control pests?

Foremost we bring soil and plants into a state of health, meaning that the nutrient and biological mechanisms for pathogen resistance and nutrient uptake are fully functional as well as having the right plant in the right place. When that happens there are naturally fewer pests and less disease. As a secondary measure, if needed while developing optimum soil and plant health, we use specific biological, essential oil and cultural controls.


Do you use biological controls?

Yes. We use wide spread soil food web solutions like actively aerated compost teas for both soil and foliar applications along with biologic and microbial controls for specific purposes such a de-toxifying hydrocarbons from soil. We also use worms, beneficial nematodes, and other beneficial predators.


Do you use borates?


Do you use synthetic chemicals?

No. Furthermore, when treating a property that has used synthetic chemicals, we immediately begin restoring soil health with microbial and biological catalysts that break down toxic particles and help restore soil and foliar biology.

What are the top 10 pesticides you use/sell/recommend?

We use NO pesticides. We do use natural products that are EPA exempt due to their safety and include ingredients such as vinegar, clove oil, cedar oil, hot pepper wax, which are very effective insect killers and deterrents. We sell and recommend St. Gabriel Laboratories products and Cedarcide products.

If pesticides are used, how much are used per year of each?

We use NO pesticides. As for our natural products we only need to use them sparingly as the results of balancing soils and bringing natural health to plants is an effective pest and disease deterrent in itself.

Does your company perform habitat modification?

Yes. We design, consult, and physically restore habitat environments - from residential yards, landslides and erosion, wetlands and riparian environments, to diverse urban situations such as green roofs, parks, streetscapes, etc.

Do you use any physical or mechanical controls?

Yes. Depending on the problem we physically amend and/or replace soils as well as perform transplanting, fertilization, weeding and grubbing, aeration, tilling, drainage work, etc.

What type of fertilizers do you use/sell/recommend?

We now market the highly effective organic fertilizer blends that we have used in our landscape installations for over 15 years, under the Hendrikus Organics label. They are USDA approved organic and safe for organic food production.


What do you usually use/sell/recommend for addressing:

termites N/A

cockroaches N/A

fleas diatomaceous earth products, Cedar Oil

carpenter ants diatomaceous earth products

fire ants diatomaceous earth products, Sharp Shooter, Cedar Oil

ants (indoor) N/A

crabgrass Calcium applications. Crab grass indicates soil chemical imbalance. Hand pull or spot spray with natural weed killer in the interim.

dandelions Calcium applications. Dandelions indicate soil chemical imbalance. Hand pull or spot spray with natural weed killer in the interim.

How do you evaluate effectiveness of your pest management

Our installations have the benefit of our soils and organic approach from the beginning. They are virtually disease and pest free. We maintain them on our all organic maintenance program to ensure their continued health and balance.
For other properties we start our program with soil nutrient testing and site evaluation and adapt a program that suits the needs of that landscape. As we build soil and plant health, we continue to monitor results, growth rates, yields, and perform annual soil nutrient testing.


Our client information is held confidential from public listings, however, if you contact us directly, we will be happy to forward you to references in response to specific questions or needs.