Disc Seed Drills:
Disc Seed Drills:
In Action | GrassFarmer Disc Seed Drill.
Why Choose a Disc Seed Drill?
At the heart of the GrassFarmer® Disc Drill is a heavy-duty 350mm (14″) concave single disc opener, staggered for efficient trash flow. Each disc is individually sprung, meaning it can deflect independently over rocks and uneven ground without transferring shock through the machine or breaking down. As a general rule, Aitchison disc drills are among the best-performing seed drills available for stony conditions — and the individually sprung disc system is a big reason why.
These large 14″ concave discs are particularly effective in matted or dense pastures, cutting through where smaller discs bog down or clog.
Disc seed drills are the go-to choice for farmers working in rocky, compacted, or residue-heavy soils. Where other planting equipment struggles, the GrassFarmer® Disc Drill keeps moving — slicing cleanly through surface trash, riding over stones, and placing seed accurately with minimal soil disturbance.
If you’re farming in stony country, dealing with dense swards like Kikuyu, or working hard summer ground, this is the drill built for your conditions. Tine drills perform exceptionally well in many situations, but when it comes to rocky soils and heavy residue, the disc is the smarter choice.
Here’s what the concave discs do…
- Slice through surface residue to avoid hair-pinning
- Cut clean, narrow furrows for accurate seed placement
- Crush clods and push aside or ride over stones
- Penetrate harder, compacted ground effectively
Because disc openers minimise soil disturbance, they help retain soil moisture, protect beneficial soil structure, and preserve microbial life — contributing to long-term pasture health. Consistent seed depth and placement across all terrain types means you’re giving every seed the best possible chance from the moment it hits the ground.
Take A Closer Look | GrassFarmer Disc Seed Drill.
Seed Distribution | The Sponge Pad System
All GrassFarmer® models feature the unique Aitchison® sponge seed distribution system — a long-proven design trusted by farmers for over 50 years and used across both the GrassFarmer® and Seedmatic® drills.
At the heart of the system is a unique sponge metering unit that handles the selected seed gently and accurately, without cracking or damaging the product. Whether you’re sowing fine grasses, coated seed, larger legumes, or heavy blends, the sponge system delivers consistent, reliable distribution across the full width of the drill.
Sowing rates run from as little as 1kg/ha right up to 350kg/ha — the versatility you need when you’re dealing with different seed types. A variable gearbox (with two ranges) rotates the sponge disc to give you precise control over your rate, making it straightforward to dial in the right output for any job.
The system is gravity-fed, so there’s no complicated air system to maintain or troubleshoot. Simple, Effective & Proven for over 50 years.
Sponge Pad Protection | The New Rodent Stop Slide
When your drill is stored, its recommended storing it without any seed in the hopper, as rodents will try and find their way to this seed.
The New and Upgraded Rodent Stop Slide fitted to GrassFarmer® models shuts off access to the foam pads completely, so rodents can’t reach them. A great addition that protects your seed metering system.
Upgrade | The Tread Board & Rear Hitch
This is a great upgrade to your GrassFarmer® seed drill making it easier to use and more versatile. It gives you safe and simple access for loading and space to carry extra bags of seed. With a rear drawbar, you can tow a compaction roller at the same time, while the integrated mounts enable you to tow cover harrows and mount a slug and rodent bait applicator (Bait-It) when needed. This upgrade is available for all GrassFarmer® 3008, 3014 and 3018 Disc and Tine models, and can also be retrofitted to existing machines. Why this is a great upgrade option :
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- Provides easy and safe access for loading seed.
- Allows you to carry extra bags of seed right on the machine.
- Rear drawbar enables towing of a compaction roller.
- Integrated mounts for towing and carrying cover harrows.
- Additional mounts for a slug or rodent applicator.
- Fits all GrassFarmer® 3008, 3014 & 3018 models—both disc and tine versions.
Wanting to retrofit? Drop us some details and we’ll be in touch.
Upgrade | Bait-It Slug Bait Applicator
The Aitchison® BAIT-IT is a rugged 12-volt broadcast spreader, built to apply slug and rodent bait in the same pass as you sow. With a spread pattern of up to 24 metres and a 75-litre hopper, it delivers wide, efficient coverage without adding time or trips to your day.
Five application rate settings give you control from 2.5–20 kg/ha. Compatible with GrassFarmer® and Seedmatic® models — a straightforward upgrade that protects your establishment from the moment seed hits the ground.
Upgrade | HD Cover Harrows
Designed to mount directly onto the GrassFarmer® treadboard and tow behind the drill, the Aitchison® HD Cover Harrows enable you to achieve more in the same pass. The heavy-duty three-row chain design spreads seed, breaks trash, and scratches soil over the row — improving seed-to-soil contact and giving you a better strike rate.
Available in 2.1 m or 2.8 m widths and complete with a tow chain. These HD Harrows are a simple upgrade that goes a long way to improving your germination.
Upgrade | Digital Weight Scales
Make calibration quick and accurate. The digital weight scales let you easily weigh seed or fertiliser during calibration, ensuring your drill is set to deliver the right rate every time.
Upgrade | Area Meter
The Area Meter displays area in hectares or acres, travel speed in km/h or mph, and distance in kilometres or metres — so you always know exactly how much ground you’ve covered. Optional functions include working-time tracking and high/low-speed alarms.
8 Row Disc Drill | 3008D
14 Row Disc Drill | 3014D
18 Row Disc Drill | 3018D
