H.M. Holloway

H.M. Holloway 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 discove

red 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.

From this week’s Valley Ag Voice, a reminder to   when driving through rural areas:Throughout California, August is mark...
08/28/2026

From this week’s Valley Ag Voice, a reminder to when driving through rural areas:

Throughout California, August is marked by the busy harvest season, with tomatoes, almonds, pistachios, and grapes being harvested at all hours of the day and night — right as school buses, parents on morning drop-off runs, and students walking or biking to class return to our rural roads in force.

That overlap is exactly why Holloway Agriculture is once again promoting its Public Service Announcement campaign through October, urging rural drivers to use extra caution while traveling through agricultural areas where harvest machinery and crews are working.

This season, the campaign is back with a new tagline reminding drivers in rural areas to: “SLOW DOWN. STAY ALERT. SAVE LIVES.”

https://www.valleyagvoice.com/lets-not-forget-to-brake-for-harvest/

Holloway and its partners remind rural drivers to drive with caution through harvest areas. By Brian Milne, Vice President of Communications, Holloway Agriculture It’s that time of year again. Harvest is upon us, and in the Central Valley and on the Central Coast, it’s an earlier harvest than pr...

We’re just two months away from our Soils in Action Fall Field Day and Tradeshow on Oct. 22, 2026, in Lost Hills, Calif....
08/26/2026

We’re just two months away from our Soils in Action Fall Field Day and Tradeshow on Oct. 22, 2026, in Lost Hills, Calif.

Join us for a day focused on practical soil solutions, new technology and ideas that can make a difference in the field.

https://soilsinaction.com/

Featured speakers:
- Allie Cushnyr, Holloway
- Morgan Trembush , Kern Machinery
- Linsi Luckett, Sunridge Nurseries
- John Bison, Bennett
- 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 and register or sponsor the event at: https://soilsinaction.com/

In honor of Pistachio Week, this week’s   post comes from the Bakersfield area where pistachio harvest is underway.Produ...
08/14/2026

In honor of Pistachio Week, this week’s post comes from the Bakersfield area where pistachio harvest is underway.

Production is reportedly down across some pistachio orchards this season due to an early bloom combined with extreme spring heat in the Central Valley, but this customer orchard is bustling right along.

Thanks to all of our growers and field workers hustling to get through harvest and help put food on our tables.

REMINDER: Be sure to give harvest crews, equipment operators and truck drivers a break when driving through rural regions this time of year.

Harvest equipment is often oversized and slow moving, and dusty roads and large trailers can affect visibility when driving through harvest zones, so please use caution when driving through these areas and !

Learn more and spread the word about the PSA at: https://brakeforharvest.com

August is a busy time of year with harvest getting underway for almonds and other California crops, and kids going back ...
08/07/2026

August is a busy time of year with harvest getting underway for almonds and other California crops, and kids going back to school, so Holloway and our partners want to remind rural drivers to please slow down while traveling through agricultural areas.

Pay extra attention when crossing intersections, or busy and often dusty harvest zones, and let’s keep all of our farm workers, drivers, residents and children safe!

According to the Census of Agriculture, nearly 4.5 million farm vehicles operate on U.S. farmlands, and those vehicles are overrepresented in road crashes considering their limited miles traveled. Additionally, several studies have found a majority of farm vehicle collisions occur in the fall, during the grueling harvest season.

You can learn more about the Public Service Announcement, how you can spread the word and do your part to drive safe in rural harvest regions, and why it’s important to this fall at https://brakeforharvest.com!

07/30/2026
Why do we apply Gypsum? True, naturally produced gypsum is made up of Calcium Sulfate and two water molecules. The calci...
07/16/2026

Why do we apply Gypsum? True, naturally produced gypsum is made up of Calcium Sulfate and two water molecules. The calcium goes to work by replacing the sodium on the soil's negatively charged particles. Leaching the sodium is key to moving it out of the root zone and gives your crops the best opportunity to thrive.

LEARN MORE BY DOWNLOADING our Gypsum Analysis, which provides a deep-dive comparison into the different types of "gypsum" products on the market.

https://hollowayag.com/analysis/



On   we’re seeing some hull split today in early maturing almond varieties in the Central Valley. The 2026 crop remains ...
06/26/2026

On we’re seeing some hull split today in early maturing almond varieties in the Central Valley.

The 2026 crop remains ahead of last year’s, with kernels fully solidified across varieties.

Hull split and NOW management remain the focus as we push through the dog days of summer.

If you’re looking for tissue samples or other custom agronomy services over the final stretch of the season, across all of California’s crops, don’t hesitate to reach out to our agronomy team today!

https://hollowayag.com/difference/

Better crops begin long before harvest.The foundation for premium crop quality starts with what's happening in your soil...
06/25/2026

Better crops begin long before harvest.

The foundation for premium crop quality starts with what's happening in your soil profile.

Improving infiltration, supporting root development and creating balanced soil conditions can make all the difference when quality matters most. Dive into our latest article and see why investing in soil health pays dividends all season long.

hollowayag.com/crop-quality-counts/
.. or click our profile link to read the article on our blog!

Great piece on our blog today by Allie Cushnyr, Senior Agronomist, CCA, PCA, discussing why crop quality counts and how ...
06/18/2026

Great piece on our blog today by Allie Cushnyr, Senior Agronomist, CCA, PCA, discussing why crop quality counts and how it starts with the soil...

"Healthy soil takes time to build, but with the right data and the right plan, growers can improve infiltration, support stronger roots, meet soil health goals and produce a more consistent, higher-quality crop."

https://hollowayag.com/crop-quality-counts

We spent part of the week capturing photos across all of Holloway's field operations — from our historic gypsum mine, to...
06/12/2026

We spent part of the week capturing photos across all of Holloway's field operations — from our historic gypsum mine, to our landfill, composting, material recovery and logistics facilities.

As the weather heats up and the summer returns, it felt like a good time to recognize the hardworking folks behind Holloway.

We're proud of our dedicated employees and partners across every part of our business, who show up every day and help make it the company it is today.

Thanks for everything you do. We appreciate every one of 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

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