What are the opening hours?

Monday 7am - 4pm Tuesday 7am - 4pm Wednesday 7am - 4pm Thursday 7am - 4pm Friday 7am - 4pm Saturday 7am - 4pm Sunday 7am - 4pm

H.M. Holloway

Name: H.M. Holloway
Address: 5060 California Avenue , Suite 710, Bakersfield, CA, 93309, US
Telephone: (800) 441-7887
Price range: $$

Call Directions Website Contact the business

Helping communities and partners grow with sustainable solutions for generations to come. H.M. Backed by more than 70 years of service to the San Joaquin Valley.

Holloway, Inc., the world’s largest supplier of agricultural gypsum, today distributes nearly one-half million tons of premium-quality gypsum each year for use in Central California. We combine complete mining, milling, monitoring, spreading and radio-dispatched delivery capabilities. History of H.M. Holloway, Inc. It was during the Depression of the early 1930’s that Harvey “Dad” Holloway discovered the mineral that was to change his destiny and the destiny of the Valley’s agricultural lands. He was working as an oil field caretaker in the Lost Hills area when he first noticed outcroppings of a strange white mineral. He would watch a few local farmers carry off wagon loads of the mineral to put on their crops. Holloway’s curiosity prompted him to take samples into Bakersfield for analysis. The lab informed him that the substance was calcium sulfate, or gypsum, a mineral known to neutralize alkali in soil and improve water penetration. Holloway concluded that the substance might have a commercial value. With the assistance of his son, Albert, he acquired a lease for a 40-acre parcel of land, and, in 1932, launched his gypsum mining operation with not much more than a pick and shovel. Holloway was creative when it came to marketing his gypsum. He knew a farmer who had a 40-acre alfalfa field on Highway 46, the main thoroughfare in the area. The farmer agreed to let him put gypsum on one half of the field. Soon, Holloway’s marketing intuition paid off. The farmer’s yield doubled on the half with gypsum, and the lush growth in a side-by-side comparison was evident to everyone traveling on 46. News of this valuable soil amendment traveled quickly, and Holloway was in business. Today, the company that started with a pick and shovel is a thriving business. Holloway gypsum has been used throughout the San Joaquin Valley to reclaim alkaline soils, improve water penetration, and in the final analysis — increase crop yields, the goal of every farmer. Call toll-free 1-800-441-7887 for information or to set up delivery.

10/26/2026

Thanks again to everyone who came out to the Soils in Action Field Day at Holloway’s historic gypsum mine in Lost Hills on Thursday. We've shared some more photos from Soils in Action on the event website ... https://soilsinaction.com/thanks-to-everyone-who-came-out-and-supported-the-soils-in-action-field-day/

Thanks again to our attendees, sponsors, volunteers, speakers and teams that came together to make this event happen!

10/24/2026

Congrats to all of the giveaway winners at the Soils in Action Field Day on Thursday.

And thank you to all of the companies that contributed gifts for the raffle! There were some great prizes for the folks who stuck around.

Such a fun event!

10/23/2026

Thanks again to all of the sponsors that helped make the Soils in Action Field Day a success!

We also wanted to thank all of the companies that contributed gifts for our giveaways, and congratulations to all of the winners!

Below are some photos from the event, and we'll be posting more galleries from the photographers on hand over the next week. https://soilsinaction.com/thanks-to-everyone-who-came-out-and-supported-the-soils-in-action-field-day/

10/23/2026

Thanks to everyone who came out and supported the Soils in Action Field Day at Holloway’s historic gypsum mine in Lost Hills, particularly all of the sponsors, volunteers, speakers and teams that came together to make this event a huge sucess.

The weather cooperated and it was great to see all of the familiar faces, plenty of new ones, meet with some innovative vendors and partners, and learn from our impressive list of speakers.

And we appreciated seeing all of the future faces of agriculture out there volunteering their time to help make the event possible.

Thanks again to everyone for coming out. And a hardhat tip to the Holloway mine and office teams for supporting.

10/21/2026

EVENT UPDATE: The Soils in Action Fall Field Day IS A GO on Thursday from 8 a.m. - 3 p.m., rain or shine!

Thursday's event includes a large tent with walkways between booths, and for lunch and the presentations if needbe. Vendors are also encouraged to bring popups in case of rain.

Below are the event details. Be sure to register ahead of time at SoilsInAction.com and have your ticket on hand when you get to the event. There is limited cell service at the site for on-site registration.

Be sure to show up early, and follow the signs as parking is expected to fill up, and please use caution when driving down Holloway Road, which is a major trucking lane for nearby farming and oil operations.

🚜 SOILS IN ACTION EVENT DETAILS:
📍 Location: Holloway Mine, 13850 Holloway Road, Lost Hills, CA 93249
📆 Date: Thursday, Oct. 22, 2026, 8 am – 3 pm

📝 CCA Hours Available:
- Nutrient Management CEUs: 0.5
- Soil & Water Management CEUs: 1.5
- Crop Management CEUs: 0.5
- Professional Development CEUs: 1

📝 DPR Hours Available:
- DPR Hours: 2.5 Hours of "Other"

🔗 Register before the show at SoilsInAction.com.

10/20/2026

Holloway Senior Agronomist Allie Cushnyr explains the Top 5 Reasons you can’t miss Thursday’s Soils in Action Field Day in Lost Hills, at Holloway’s historic gypsum mine:
1. Discover where your gypsum comes from.
2. Explore topics focused on soil health.
3. Earn DPR and CCA hours.
4. See demos and meet vendors from 35+ companies.
5. Learn from expert speakers and network with soil health leaders.
Register today at SoilsInAction.com!

🌦️ Thursday's event is a go, rain or shine and includes a large tent with walkways for lunch and the presentations if needbe.

🚜 SOILS IN ACTION EVENT DETAILS:
📍 Location: Holloway Mine, 13850 Holloway Road, Lost Hills, CA 93249
📆 Date: Thursday, Oct. 22, 2026, 8 am – 3 pm
📝 CCA Hours Available:
- Nutrient Management CEUs: 0.5
- Soil & Water Management CEUs: 1.5
- Crop Management CEUs: 0.5
- Professional Development CEUs: 1
📝 DPR Hours Available:
- DPR Hours: 2.5 Hours of "Other"
Register today at SoilsInAction.com!

🎤 Presenters at the Field Day include:
- Allie Cushnyr, Holloway
- Morgan Trembush , Kern Machinery
- Linsi Luckett, Sunridge Nurseries
- John Bison, Greenleaf Ag, a Bennett Company
- Dr. Isaya Kisekka, UC Davis
- Christopher Hight, PhD , Grimmway Produce Group
- Joel Kirksey, MS, CSUB, Center for Accessibility and Essential Needs

🚜 We'll also have some great demos/exhibits from our sponsors, including:

Kern County Farm Bureau, PLANT FOOD SYSTEMS, INC., Kern Machinery, Kelp Blue, Suterra, Wonderful Citrus, Semios, ProFarm, Bakersfield College Agriculture, Recology, UC Master Gardener Program, USDA Natural Resources Conservation Service California, Fifth Third Bank, California Organic Fertilizers, Inc., Skysense, Farmers Fertilizer & Supply Inc., EarthSol, ICL Group, Redox Bio-Nutrients, Green As It Gets, AgPro Llc, ECO2MIX Inc., Greg's Petroleum Service, Nutrient TECH, BioFlora, Desert Control

10/16/2026

This week's comes from Holloway's Historic Gypsum Mine in Lost Hills, Calif., site of the upcoming Soils in Action Field Day on Thursday, Oct. 22.

Holloway Senior Agronomist Allie Cushnyr explains why you can't miss this soil-focused event next week!

🚜 SOILS IN ACTION EVENT DETAILS:

📍 Location: Holloway Mine, 13850 Holloway Road, Lost Hills, CA 93249

📆 Date: Oct. 22, 2026, 8 am – 3 pm

📝 CCA Hours Available:
- Nutrient Management CEUs: 0.5
- Soil & Water Management CEUs: 1.5
- Crop Management CEUs: 0.5
- Professional Development CEUs: 1

📝 DPR Hours Available:
- DPR Hours: 2.5 Hours of "Other"

🔗 Register today at SoilsInAction.com.

🎤 Presenters at the Field Day include:
- Allie Cushnyr, Holloway
- Morgan Trembush , Kern Machinery
- Linsi Luckett, Sunridge Nurseries
- John Bison, Greenleaf Ag, a Bennett Company
- Dr. Isaya Kisekka, UC Davis
- Dr. Gordon Rees, Cal Poly
- Christopher Hight, PhD , Grimmway Produce Group
- Joel Kirksey, MS, CSUB, Center for Accessibility and Essential Needs

10/13/2026

Thanks to all of the sponsors supporting next week's Soils in Action Field Day! Register today at SoilsInAction.com, and be sure to come out and see all of the exhibits from these great sponsors on Thursday, Oct. 22, in Lost Hills, Calif.

🚜 SOILS IN ACTION EVENT DETAILS:

📍 Location: Holloway Mine, 13850 Holloway Road, Lost Hills, CA 93249
📆 Date: Oct. 22, 2026, 8 am – 3 pm

📝 CCA Hours Available:
- Nutrient Management CEUs: 0.5
- Soil & Water Management CEUs: 1.5
- Crop Management CEUs: 0.5
- Professional Development CEUs: 1

📝 DPR Hours Available:
- DPR Hours: 2.5 Hours of "Other"

🔗 Register today at SoilsInAction.com.

🎤 Presenters at the Field Day include:
- Allie Cushnyr, Holloway
- Morgan Trembush , Kern Machinery
- Linsi Luckett, Sunridge Nurseries
- John Bison, Greenleaf Ag, a Bennett Company
- Dr. Isaya Kisekka, UC Davis
- Dr. Gordon Rees, Cal Poly
- Christopher Hight, PhD , Grimmway Produce Group
- Joel Kirksey, MS, CSUB, Center for Accessibility and Essential Needs

10/12/2026

We're only a few days away from the Soils in Action Field Day. Here's a look at who will be presenting "Out in the Middle" of Holloway's Historic Gypsum Mine on Thursday, Oct. 22 in Lost Hills, Calif.:

- Allie Cushnyr, Holloway
- Morgan Trembush , Kern Machinery
- Linsi Luckett, Sunridge Nurseries
- John Bison, Greenleaf Ag, a Bennett Company
- Dr. Isaya Kisekka, UC Davis
- Dr. Gordon Rees, Cal Poly
- Christopher Hight, PhD , Grimmway Produce Group
- Joel Kirksey, MS, CSUB, Center for Accessibility and Essential Needs

🔗 Learn more about the event and register to attend or sponsor at SoilsInAction.com.

🚜 SOILS IN ACTION EVENT DETAILS:

📋 Ag professionals in California can earn Continuing Education Units (CEUs) at our upcoming Soils in Action Field Day on Oct. 22 in Lost Hills, Calif.

📝 CCA hours details for the event are listed below:

- Nutrient Management CEUs: 0.5
- Soil & Water Management CEUs: 1.5
- Crop Management CEUs: 0.5
- Professional Development CEUs: 1

📝 DPR Hours Available:
- DPR Hours: 2.5 Hours of "Other"

10/06/2026

When should you apply soil amendments for next season?

That’s a common question we get at Holloway this time of year, when growers are wrapping up harvest and looking ahead to soil amendment applications for the following season.

In many cases, the best time to spread is right after harvest, while fields are still dry and accessible.

And with El Niño conditions on the horizon, growers should be thinking ahead about the 2027 season and how their soils will handle potentially wetter winter conditions…

Learn more and contact us today to speak with a local agronomist to get your souks sampled for the 2027 season… https://hollowayag.com/when-to-apply-amendments-in-wet-year/

Ponding issues in a Shafter-area orchard due to poor soil conditions three years ago. With El Niño conditions on the horizon, now is the time to prepare soils for the 2027 seasonWhen should you

Address

5060 California Avenue , Suite 710
Bakersfield, CA
93309

Opening Hours

Monday	7am - 4pm
Tuesday	7am - 4pm
Wednesday	7am - 4pm
Thursday	7am - 4pm
Friday	7am - 4pm
Saturday	7am - 4pm
Sunday	7am - 4pm

Telephone

(800) 441-7887

Website

http://hmholloway.com/

Alerts

Be the first to know and let us send you an email when H.M. Holloway posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.