When to Turn Horses Out in Spring

Key Takeaways

• Spring grass in the UK is high in sugars, increasing the risk of laminitis if turnout is unmanaged
• Gradual turnout is essential to allow horses’ digestive systems to adapt safely
• Weather conditions, especially sunny days and cold nights, can increase sugar levels in grass
• Start with short turnout periods and slowly increase time over several weeks
• Monitor your horse closely for weight gain, behaviour changes, or signs of discomfort
• Good paddock management plays a key role in reducing health risks during spring transition

Introduction

As winter fades and the first signs of spring appear across the UK, many horse owners look forward to turning their horses out onto fresh pasture again, we know that we sure do! After months of restricted grazing, stabling, or limited turnout, it’s tempting to open the gates and let horses enjoy the lush green fields. BUT, spring turnout is never quite as simple as it seems.

The sudden availability of nutrient-rich grass can pose serious health risks, particularly when it comes to laminitis and digestive upset. Let's stay clear of those!

Understanding when to turn horses out in spring in the UK, and more importantly, how to do it safely, is essential for protecting your horse’s health.

In this guide we walk you through the key considerations, from grass sugar levels to gradual turnout strategies, so that you can transition your horse safely and confidently into spring grazing. Let's dive in!

Understanding Spring Grass and Sugar Levels

One of the biggest risks associated with spring turnout is the sudden increase in non-structural carbohydrates (NSCs), which is essentially just sugars that are found in new grass growth. Sounds tasty, but poses risks.

In early spring, grass grows rapidly due to increased daylight and moisture. This growth produces high levels of sugars, especially under certain weather conditions. Some factors that can increase those sugar levels in grass, include:

• Bright, sunny days followed by cold nights
• Frost conditions
• Rapid grass growth after rain
• Short, stressed grass being grazed down too low

These sugars can overwhelm a horse’s digestive system, particularly in those prone to metabolic conditions or laminitis. Think about how sugar can affect our own digestive systems - same goes for horses!

On most UK yards, this is exactly where things go wrong, while the paddock may look healthy and inviting, it can actually be one of the most dangerous times of year for unrestricted grazing.

Why Gradual Turnout is Essential

Turning horses out suddenly onto rich spring pasture can lead to a range of health issues, including:

• Laminitis
• Colic
• Diarrhoea
• Rapid weight gain
• Behavioural changes (excess energy or discomfort)

Horses coming off winter feeding regimes, typically hay-based diets, need time for their gut microbiome to adapt to fresh grass. Slow down and don't go rushing into a major change that could have serious affects on their gut health.

Benefits of gradual turnout:

• Allows the digestive system to adjust
• Reduces risk of laminitis
• Helps manage weight gain
• Supports consistent energy levels
• Minimises stress on the horse

Think of spring turnout as a transition, not a switch. Taking a slow and steady approach will pay off in the long run. Let's not go from off straight to on - the process should be gradual as we transition into the new season.

When is the Right Time to Turn Horses Out in Spring?

There will never be a single “perfect date” for spring turnout in the UK, it depends on a combination of environmental and horse-specific factors. Some key things you can look to consider to determine when the right time is, include:

• Ground conditions: Avoid turnout on heavily waterlogged paddocks
• Grass length: Shorter grass can sometimes contain higher sugar levels
• Weather patterns: Sunny days with cold nights increase risk
• Your horse’s condition: Weight, age, and metabolic health all matter

Generally, early to mid-spring is when many owners begin controlled turnout, but timing should always be based on conditions rather than the calendar. Take note of the above and use these to help determine the ideal timing to turn your horses out.

Best times of day for turnout:

• Early morning (after overnight sugar use)
• Late evening (after photosynthesis slows)

Avoid turning out during late afternoon on sunny days, as this is when sugar levels tend to peak.

 

How to Introduce Spring Turnout Safely

A structured approach to turnout is one of the most effective ways to reduce risk.

Let's run through an easy, step-by-step turnout plan!

Step-by-step turnout plan:

• Start with 15–30 minutes per day
• Gradually increase by 10–15 minutes every few days
• Monitor your horse closely after each turnout
• Maintain access to hay to prevent overeating grass

Over a few weeks, you can build up to longer periods of turnout, depending on your horse’s tolerance and paddock conditions.

Additional strategies:

• Use a grazing muzzle for controlled intake
• Strip graze to limit access
• Rotate paddocks to avoid overgrazing

Consistency really is key — continue to avoid sudden increases in turnout time, even if your horse seems to be coping well.

 

Managing Laminitis Risk During Spring

We're sure you've heard of laminitis. It's one of the most serious risks associated with spring grazing, particularly in horses that are:

• Overweight
• Native breeds or good doers
• Previously laminitic
• Diagnosed with EMS or PPID

So, what should you be looking out for? These are some indicators to keep an eye out for:

• Reluctance to move
• Heat in the hooves
• Increased digital pulse
• Shifting weight or standing awkwardly

If you notice any of these signs, remove your horse from pasture immediately and consult your vet.

Prevention tips:

• Limit access to rich pasture
• Maintain a healthy body condition
• Use track systems or restricted grazing areas
• Regularly assess your horse’s weight

Being proactive is far more effective than reacting after a problem develops.

The Role of Paddock Management in Safe Turnout

Your paddock setup plays a major role in how safely your horse transitions into spring grazing.

Poor paddock management can lead to:

• Uneven grazing
• High parasite loads
• Patchy, stressed grass
• Increased mud and soil damage

Good paddock practices include:

• Regular manure removal (like using a Paddock Blade)
• Rotational grazing
• Avoiding overstocking
• Maintaining even pasture growth

Removing manure frequently not only improves pasture quality but also reduces parasite exposure, this is something that becomes more relevant as temperatures rise in spring. The Paddock Blade is a great tool to implement into your paddock maintenance routine! If manure isn’t removed regularly, you’re not just dealing with grass, you’re creating the perfect environment for parasites and flies.

A well-managed paddock allows for more controlled, healthier grazing conditions, making the transition into spring far smoother.

Monitoring Your Horse During Transition

Even with the best plan in place, every horse is going to respond differently to spring turnout. It's important to keep an eye on your horses during this time.

What to monitor:

• Weight and body condition
• Energy levels and behaviour
• Droppings consistency
• Hoof health

Regular checks will help you catch any issues early and adjust your approach if needed.

Keep in mind that changes can happen quickly, especially during periods of rapid grass growth, so ongoing observation is essential. For any concerns, it is important to consult a professional or your local vet.

Conclusion

Spring turnout is one of the most rewarding times of year for horse owners, but it also comes with real risks if not managed carefully.

By understanding how spring grass behaves, introducing turnout gradually, and keeping a close eye on your horse’s health, you can create a safe and positive transition into grazing season.

Taking a proactive approach now will not only reduce the risk of laminitis and digestive issues but also set your horse up for a healthier, more balanced grazing season ahead.

 

Frequently Asked Questions

1. When should I start turning my horse out in spring in the UK?

Start when ground conditions improve and grass begins growing, but always introduce turnout gradually rather than all at once.

2. How long should I turn my horse out for at first?

Begin with 15–30 minutes per day and slowly increase over several weeks.

3. Is spring grass dangerous for horses?

It can be, especially due to high sugar levels which increase the risk of laminitis if not managed carefully.

4. What time of day is safest for turnout?

Early morning or late evening is generally safest, as sugar levels in grass are lower.

5. How can I reduce laminitis risk during spring turnout?

Limit grazing time, monitor weight, use controlled grazing methods, and ensure gradual adaptation to pasture.

TL;DR

Spring turnout in the UK should be introduced slowly due to high sugar levels in fresh grass, which can increase the risk of laminitis and digestive issues. Start with short turnout periods, build up gradually, and monitor your horse closely. Managing paddocks effectively and choosing the right times of day for turnout will help ensure a safe and healthy transition into the grazing season.