There Is No Such Thing as a Laminitis Safe Seed Mix
- 1 day ago
- 4 min read
Laminitis is one of the most feared conditions in horse ownership.
It can be devastating and, in severe cases, fatal. Because of this, many horse owners look for ways to make grazing safer. Concerns often increase during periods of rapid grass growth, when weather conditions encourage lush pasture.
Alongside growing awareness that some high-yield agricultural grasses, particularly certain ryegrass varieties, can contribute to sugar spikes, this concern has led to a rise in ryegrass-free pasture seed mixes marketed as “laminitis safe” or “suitable for laminitics.”
While removing ryegrass may reduce some risks, the label “laminitis safe” is misleading.
The reality is simple: No seed mix can guarantee laminitis safety.
Most Laminitis Is Linked to Insulin Dysregulation
In the UK, approximately 90% of laminitis cases are endocrinopathic, meaning they are associated with insulin dysregulation or PPID (Cushing’s disease).
Insulin dysregulation is similar to type 2 diabetes in humans.
In affected horses, the body produces an exaggerated insulin response when sugars are consumed. Elevated insulin levels can disrupt blood flow and cellular function within the hoof, triggering laminitis.
Research suggests that pasture or forage containing more than around 10% water-soluble carbohydrates (WSC) can trigger problems in susceptible animals.
However, this is where a major misunderstanding arises.
No seed mix can guarantee pasture sugar levels remain below this threshold.
Plant Sugar Levels Are Not Fixed
The sugar content of plants changes constantly depending on environmental conditions. Factors that influence pasture sugar levels include:
Sunlight intensity
Night-time temperatures
Soil fertility and nitrogen availability
Drought or frost stress
Grazing pressure
Recovery time between grazing
Plants produce sugars through photosynthesis during daylight hours and use those sugars for growth overnight. When growth is restricted, for example during cold nights, drought stress or heavy grazing, sugars accumulate within the plant.
This means the same plant species can contain very different sugar levels depending on weather and management conditions.
Because of this, no seed mix alone can control sugar levels in a pasture.
Species Diversity Matters
Although no seed mix can guarantee low sugar levels, species composition still plays an important role.
Natural grasslands rarely contain a single grass species. Instead, they include a mixture of grasses, legumes and broadleaf plants such as wildflowers and herbs.
Many of these species tend to have relatively lower sugar concentrations than highly productive agricultural grasses bred for rapid growth.
A more diverse pasture can help:
Dilute sugar intake per mouthful
Encourage slower, more selective grazing behaviour
Improve vitamin and mineral availability
Support soil health and microbial activity
Increase resilience to drought, flooding and other environmental stress
This does not make pasture “laminitis safe.”
However, it can help reduce risk and create more balanced grazing ecosystems.
Laminitis Often Starts With Energy Imbalance
Another important point often overlooked is that many horses are not initially sugar sensitive.
Native breeds and good doers often gain weight on pasture simply because it provides more energy than they require. Over time, chronic over-nutrition can lead to obesity and Equine Metabolic Syndrome (EMS). Just as in humans, obesity can contribute to the development of type 2 diabetes-like insulin dysregulation.
Once insulin dysregulation develops, sugar intake becomes far more significant. At that stage, amounts of sugar that were previously tolerated can trigger laminitis.
This means laminitis prevention often begins long before metabolic disease appears, with energy balance and weight management.
Why “Laminitis Safe” Seed Can Delay Real Solutions
When laminitis is framed as a simple “grass type problem,” or a plant species problem, important management decisions are often delayed. Owners may rely on a seed mix to solve the issue instead of addressing the wider grazing system.
This can lead to:
Excessive pasture intake
Progressive weight gain
Development of metabolic disease
For the horse, the consequences of this can be fatal.
Managing Pasture for Horses With Insulin
Dysregulation
For horses already diagnosed with insulin dysregulation, pasture management often needs to include strategies that control intake while maintaining movement, social interaction and gut health.
Common approaches include:
Strip grazing
Track systems
Grazing muzzles
Dry lots or restricted turnout areas
Feeding soaked hay
Mixing hay with straw to reduce calorie intake
Maintaining a lean body condition
Encouraging appropriate exercise where possible
The goal is not necessarily to eliminate pasture completely, but in some cases temporary removal from grazing may be required to prevent acute laminitis episodes.
Healthy Horse Pasture Is an Ecosystem
Pasture management works best when we view grazing as an ecological system, rather than simply a list of plant species.
Healthy horse pasture balances several interacting factors:
Diverse plant communities
Soil health and microbial activity
Controlled grazing pressure
Appropriate rest and recovery periods
Monitoring horse body condition
Seed mixes can support this process, but they are only one part of the system.
Management, environment, and horse physiology all interact to determine the outcome.
Learning to Design Healthier Grazing Systems
If you would like to learn how to design horse pastures that support both horse welfare and ecological resilience, the Hoof and Habitat courses explore these principles in detail.
If you are reseeding pasture, our seed mixes have been developed to support diverse, resilient grazing systems for horses.
All courses and seed mixes are designed by those whose work on biodiversity and sustainable horse keeping has been featured in Horse & Hound and Your Horse Magazine.
FAQ: Laminitis and Pasture Management
Q1: Can ryegrass-free mixes prevent laminitis? No. Removing ryegrass may reduce risk, but pasture sugar levels fluctuate daily. Seed mix alone cannot make a pasture laminitis-safe.
Q2: How can I reduce laminitis risk on pasture? Focus on energy balance, species diversity, controlled grazing and monitoring body condition, rather than relying on a single seed mix.
Q3: When should I restrict grazing for a laminitis-prone horse? If a horse is overweight, or has EMS, restrict grazing and encourage weight loss. If your horse shows insulin dysregulation, temporary pasture restriction is recommended to minimise sugar intake and encourage weight loss (Please - always consult your veterinarian and follow their advice)!
Q4: Are diverse seed mixes still worth sowing? Yes. While they cannot guarantee low enough sugar levels, they create more resilient, ecologically balanced pastures that support horse welfare and reduce risk over time.
Save time, money, and unnecessary interventions while creating thriving, healthy paddocks.