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Did you know that a new National Liming Programme has been launched by the Government to help farmers offset part of the expense of using lime?

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Serving customers for over 60 years

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Our values and principles are honesty, integrity and respect for people.

A family affair now and then

A family business since the early 1960's.

Sustainability in mind

As a company we to operate with due consideration and respect for the environment at all times.

the first computer
Historical photo of Pat, John Joe, Michael, Billy and Marguerite
Michael Senior & Mamie McGrath

“Rusal Aughinish is the largest alumina refinery in Europe and the largest of the alumina facilities operated by UC RUSAL.The plant was built between 1978 and 1983 and had an initial rated capacity of 800,000 tonnes a year. The current annual capacity of the refinery is in excess of 1.8 million tonnes of alumina. Rusal Aughinish has always been to the forefront in terms of technology in the industry. Year after year it implements the most modern technologies available to ensure it remains one of the top alumina producers in the world.

McGrath’s Limestone have supplied Rusal Aughinish for past number of years, during this time they have helped Aughinish to maximise efficiency by producing specialised granular and powder calcium carbonate products customised to their needs.

“McGraths of Cong have been a supplier to Michael O Malley Tarmacadam Contractors Ltd for a long number of years.  We can only praise their professional , prompt and courteous service.  The quality of their product is outstanding and can be seen in many of our pavement overlay contracts around Mayo and Galway.”

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🌱 Ready to see your crops thrive? 🌾
Soil pH is key to unlocking nutrient availability—so don’t forget to apply lime at time of reseeding! 🍃 Incorporating it into the seedbed ensures better germination and stronger crop establishment. 💪🌍
#timetolime #grolime #mcgrathspremiumlime
⚡ Improve Nutrient Uptake – Start with pH! ⚡
Optimising soil pH boosts the efficiency of fertilisers and organic manures 🌿💧 Plus, it extends the life and performance of your reseeded grassland swards 🌾💪 Don’t let nutrients go to waste — get the most from every application!
#timetolime #grolime #mcgrathspremiumlime
🌟 Soil Success with Lime! 🌟
Spreading lime = more grass growth 🌱
More grass = less need for concentrates 🐄
That means lower feed bills and a better return on investment 💰
A simple step that delivers big results! 🚜✅
#LimeItRight #timetolime #grolime #mcgrathspremiumlime
World Earth Day 🌍
Celebrating the beauty of nature and the importance of preserving it today and everyday 💚 At McGrath’s Limestone here in Cong, we’re committed to sustainable practices that protect our planet’s resources for generations to come. Let’s work together to nurture the earth and build a greener future. 🌱
#WorldEarthDay #Sustainability #McGrathsLimestone
🌿 Soil Fertility Starts with pH 🌿
Keeping your soil pH at optimum levels boosts microbiological activity — leading to better nutrient recycling and release. Using Lime it is the key to unlocking their full potential. Feed your soil right, and it’ll feed your crops! 🌾💪
#SoilFertility #grolime #timetolime #mcgrathspremiumlime
Wishing our customers, staff, friends & family a very Happy Easter from all at McGraths 🐣💐 
#Easter #Spring #McGrathsCong
🧪 When Was Your Last Sample? 🌱
Soil sampling every 3–5 years is key to keeping your pH levels in check. It’s the only way to make sure your soil stays in the optimum range for both grassland and tillage. Healthy soil = better growth. Don’t guess it — test it! ✅🌾
#SoilSampling #FarmSmart #grolime #timetotest #mcgrathspremiumlime
🔬 Mind Your pH! 🌾
For mineral soils, keep your pH on point — aim for 6.3 on grassland and 6.5 for tillage. A balanced pH means better nutrient uptake and stronger yields. Stay sharp, monitor regularly! 📈🌿
 #SoilHealth #pHMatters #grolime #timetolime #mcgrathspremiumlime
🌱 Boost Your Grass Yield Year-Round! 🌱
Lime can be applied any time, but right after silage is ideal — with bare soils, you get the maximum impact. Don’t miss the chance to improve soil pH and increase annual grass production. Spread smart, grow strong! 💪🚜 #timetolime #grolime #mcgrathspremiumlime
Great to welcome the 2nd year Earth & Ocean Science and Environmental Science students from Galway University to McGraths Limestone, Cong, as part of their 'Introduction to Fieldskills' course! 🪨🔍

The students got a behind-the-scenes look at a working quarry, learning about the vital role limestone plays in everyday life, as well as the environmental protection measures and monitoring we carry out to ensure sustainable operations. 🌿📊
They also learned how the next blast site is chosen!

Also a big thanks to Benjamin Thébaudeau in the JCWL Geopark for putting the University in contact with us.

Delighted to support the next generation of geoscientists and environmental specialists! 👷‍♂️🌍
#SustainableQuarrying #EarthScience #EnvironmentalScience #FieldSkills #McGrathsLimestone #LimestoneMatters #GalwayStudents
We will be closed Friday 18th April and reopening Tuesday morning on the 22nd April! 🐣💐🐇
We hope you enjoy your Easter break! #easter #openinghours #mcgrathslimestone
🧪 Analyse It – Know Your Soil! 🌍
Developing a liming programme will provide one of the best returns on investment on the farm. Soil sampling every 3–5 years is a must to keep your pH in check and your land performing at its best. Whether it’s grassland or tillage, staying in that optimum pH range means better growth, better yields, and smarter farming. Don’t guess — test! ✅🌱
#timetolime #mcgrathspremiumlime #grolime
McGraths are one of the top producers of agricultural ground Limestone in the West Of Ireland with a TNV (Total Neutralisation Value) of 98.5% and ENV (Effective Neutralising Value) of up to 60%. 🚜Check out our website to learn more! https://mcgraths.ie/product/grolime/
#timetolime #mcgrathspremiumlime #grolime
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