1220 5th St, Arcata, CA 95521
(855) 707-3276

Contact Us

Please feel free to contact us using the form below, or for faster service, call us at (855) 707-3276. Also, if you would like to stop by one of our two locations, you can find a map and our addresses below.

Northern Humboldt Location

1220 5th St, Arcata, CA 95521

Next to Wing Inflatables. Take K Street to 5th Street and head northwest. Cross the train tracks and enter the gate. Drive slightly left and then behind Wing’s parking area to the Humboldt Ag Supply location.

The front of the Humboldt Ag Supply location

Southern Humboldt Location

1271 Evergreen Rd #3, Redway, CA 95560


Take the Redway Exit off the 101, take Redway Rd to Evergreen Rd and drive up the hill until you get near the end and take a right. Our building is right there, with ample parking in front of our storefront. 

Southern Humboldt Location of Humboldt Ag Supply

Redway location is now appointment only – Call 855-707-3276 to make an appointment

We sincerely apologize but our Redway location (drop-off spot) is closed. In order to continuing servicing our clients, we recommend that you send your samples using Priority Mail. Once we receive the samples, we can then contact you and inquire about any questions or comments you may have.  Alternatively, you can drop off your soil sample at Northcoast Horticulture Supply in Fortuna, off the 12thstreet exit. 

Humboldt Ag Supply will still offer drop-ships to this location – by appointment only – includes the Nutrient Management Programs. Please call 855-707-3276 for more information or to place an order.

Thank you for your continued business.