1220 5th St, Arcata, CA 95521
(855) 707-3276
info@HumboldtAgSupply.com

How Modern Farms Grow

The source for fertilizers and soil management

SOIL FERTILITY MANAGEMENT

Humboldt Ag Supply is your partner in soil fertility management — delivering leading sustainability, technology, and efficiency. Together we can produce measurable results year after year without harmful chemicals.

CUSTOM SOLUTIONS

What to put in the ground, how much, and when? Humboldt Ag Supply can support all of your soil fertility needs with our comprehensive product offerings — sustainable fertilizers that promote beneficial soil biology.

SUSTAINABILITY

We work hard to bring you unique, effective, and low-impact materials from high quality producers. And we’re always looking for products that will help you build a solid foundation for healthy crops.

Sustainable, straight out of the gate

A Better Way to Fertilize

The best growth happens when you have access to the right materials and cutting-edge information. We offer soil and water testing to our farmers and we can develop an amendment program full of fertilizers matched to your needs. And we provide convenience and savings with delivery options and Farmer Direct bulk pricing.

The Right Products for You & Your Farm

What to put in the ground, how much, and when? Humboldt Ag Supply can support all of your soil fertility needs with our comprehensive product offerings — sustainable fertilizers that promote beneficial soil biology.

We work hard to bring you unique, effective, and low-impact materials from high quality producers. And we’re always looking for products that will help you build a solid foundation for healthy crops.

WATER & SOIL TESTING WITH DIRTY BUSINESS

We’ve partnered with Dirty Business Soil Analytics, the premier Ag lab in Humboldt County, California, to provide the very best quality lab testing.

NUTRIENT MANAGEMENT PROGRAMS

We’ll put together an easy to follow schedule for your farm’s soil type and nutrient requirements. We use our knowledge & training to make make the science easy to understand

HIGHER PRODUCTION WITH LESS INPUTS

We can help your farm make more money by providing only exactly what your plants need to increase yield, and not extra fillers or nutrients your soil already has.

SUSTAINABILITY IS OUR MISSION

We want Humboldt to grow, and that takes growers in Humboldt to succeed & pass their farm down to the next generation of farmers. Together, we can make that happen!

Products

With the Cannabis Industry changing ever faster, you can’t just throw money (or nutrients) around like people once did. Now is the time to test your soil, create a nutrient management plan, and then only purchase what you need to produce the highest yields. 

Our Family, Our Team

Under the direction of Northcoast Horticulture Supply, our companies have joined forces under one roof. Collectively, we offer an all-inclusive, one-stop shop for all your industry needs

Humboldt Ag Supply

Custom Soil Blends & Amendments

Northcoast Horticulture Supply Logo

Northcoast Horticulture Supply

Garden Supplies, Services, & Solutions

Dirty Business Logo

Dirty Business Soil Analytics

Agriculture Soil & Water Testing Lab

Humboldt Green Logo

Humboldt Green

Educate, Collaborate, Elevate

1 Degree Consulting

Cannabis Business Consluting

Humboldt Green Week

Empower the Community

Get Your Nutrient Management Plan Right Now!

Latest News

Keep up to date with the Humboldt growing scene right here.

NHS Vendor Dayz 2019

Northcoast Horticulture Supply Vendor Dayz Event

Northcoast Horticulture Supply is gearing up for our biggest store event of the year during Humboldt Green Week. Come on out to our 14th annual customer appreciation event during Vendor Dayz. Stop into[…]

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We Are Family

Dirty Business Soil & Humboldt Ag Supply Join Northcoast Horticulture Supply

Northcoast Horticulture Supply has some big news to share in 2019! We’ve expanded our Farm-Direct services by collaborating directly with Dirty Business Soil and Humboldt Ag Supply under one roof at our Eureka location.[…]

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Contact us

We’re happy to answer product or cultivation questions, field inquiries about products you don’t see on our website, or chat about the future of your farm. Please fill out the form below if you need assistance.