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The Mill of Black Horse

4551 Norrisville Road
White Hall, MD 21161
410-692-2200

M-F 7:30-6:00

Sat 7:30-5:00

Sun Closed

We strive to provide quality products with great service, at affordable prices. At The Mill of Black Horse, you will find your favorite lawn and garden supplies, pet supplies, work apparel, livestock feed, and more. If you need help with something, just ask any of our experienced and friendly staff!

Beige building with a tree and street in the background

Visit The Mill of Black Horse

The Mill expanded to serve you in your town.

After more than 20 years as a Southern States Company-owned store, The Mill of Black Horse officially became a member of The Mill family in January of 2003. It has long been a fixture of the agricultural community and now it’s the hub for our fencing supplies, agronomic services, including custom fertilizer and chemical application.

This location hosts an annual “Black Horse 4-H Day” in May, which is well attended by community members. The 4-H members sell pit beef and other lunch items as a fundraiser to help their club.

Halloween Pet Photo Contest

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Starts: Saturday, October 31, 2026 at 8:00am EST

The Mill's Halloween Pet Photo Contest runs all October. Enter your pet's best costume photo for a chance to win. Details at the store.

The Mill’s Turf Recertification

Jarrettsville Volunteer Fire House

Starts: Tuesday, December 1, 2026 at 8:45am EST

Join us at the Jarrettsville Volunteer Fire House on Tuesday, December 1 from 7:45am to 4:00pm for The Mill’s Turf Recertification.

Wild Bird Sale

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Starts: Monday, November 9, 2026 at 1:00am EST

The Mill’s Wild Bird Sale runs November 9 through 15 at all locations. Stock up on wild bird supplies for the season.

Veteran’s Day Sale

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Starts: Wednesday, November 11, 2026 at 9:00am EST

The Mill’s Veteran’s Day Sale is November 11 at all locations. Active and retired military save 10% in store with ID.

Thanksgiving

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Starts: Thursday, November 26, 2026 at 9:00am EST

All Mill locations are closed Thursday, November 26 for Thanksgiving. Regular store hours resume Friday, November 27.

Black Friday

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Starts: Friday, November 27, 2026 at 9:00am EST

Black Friday is November 27 at all Mill locations. Sale details coming soon.

Small Business Saturday

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Starts: Saturday, November 28, 2026 at 8:00am EST

Shop small at The Mill on November 28. Save 5% on Mill branded feed, seed, and apparel at all locations.

Cyber Monday

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Starts: Monday, November 30, 2026 at 8:00am EST

Cyber Monday at The Mill is November 30. Save $20 when you spend $150.

Current Job Openings

Join the team at The Mill of Black Horse!

Learn More

We are seeking part-time Warehouse Associates.

Warehouse associates help load and unload trucks and customer's cars. Product inventory, restocking the retail store and occasional deliveries may be part of the responsibilities of this position. Must be customer service oriented and able to lift and carry at least 50 lbs.
Learn More

We are looking to hire truck drivers to support our agronomy application team and to deliver products to farms and other Mill locations. Based at The Mill of Black Horse or The Mill of Hampstead.
Learn More

We are seeking a part-time Retail Associates.

Retail Team Members are responsible for assisting customers with their purchases of feed, seed, and supplies for their farms, horses, livestock, pets, wildlife, lawns, and gardens. Customer service skills, product knowledge, and the ability to multitask are important for this position.
Apply Now
The Mill of Black Horse Services

Agronomy Fertility Review

Farm and Home Delivery

Fecal Egg Counting

Fencing & Palleted Item Delivery

Hay Testing

Heat Pellets Delivery

Laboratory Soil Testing

Livestock Nutrition Consulting

Propane Service

Show Feed Services