As your baby grows, their sleep needs - and safety considerations — evolve. One of the most common questions parents ask is “When should I lower the cot mattress?” Knowing the right time to make this change is essential for your baby’s safety and comfort. In this guide, we’ll walk you through the signs to look for, why lowering the cot matters, and how to make the transition safely.
Why Cot Height Matters
Modern cots are designed with adjustable mattress heights for a reason: your baby’s safety. The higher setting makes it easier to lift a newborn in and out, while the lower setting keeps older, more mobile babies safe from climbing or falling.
Lowering the cot at the right time helps prevent accidents and gives you peace of mind knowing your little one is sleeping securely.
If you’re choosing a cot that grows with your child, look for one with multiple mattress height settings and a sturdy, long-lasting design - like the elegant Leander Cot or the modern Leander Linea Cot. Both are crafted with thoughtful Danish design and can be adjusted to suit every stage of your baby’s development.
View the Leander Linea Cot Here
When to Lower the Cot Mattress
There’s no exact age that applies to every baby - it depends on their physical development. However, here are key stages to help guide your decision:
1. When your baby starts rolling over (around 3–5 months)
Once your baby can roll, they become more mobile and may move closer to the edge of the cot. This is a good time to lower the mattress to the middle setting.
2. When your baby can sit up (around 6–8 months)
If your little one can sit without support, it’s time to lower the cot further. Babies at this stage love to explore their surroundings - and sitting up in a high cot can increase the risk of falls.
3. When your baby starts pulling up or standing (around 8–10 months)
This is the most important stage. The mattress should be on the lowest setting before your baby can pull up or stand. Some babies reach this milestone earlier, so keep a close eye on their development.
How to Safely Lower a Cot
When lowering your baby’s cot:
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Follow the manufacturer’s instructions – each cot design is slightly different.
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Remove the mattress before adjusting the base to prevent strain or damage.
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Double-check all screws and fixings are secure afterwards.
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Ensure the mattress fits snugly with no gaps around the edges.
If your cot is convertible - such as the Leander Classic Cot which can transform into a junior bed - you’ll also want to familiarise yourself with how it adapts as your child grows.
View the Leander Classic Cot in Oak Here
Safety Tips for Peaceful Sleep
A few extra safety reminders as your baby becomes more active:
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Keep pillows, bumpers, and loose bedding out of the cot.
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Always place your baby on their back to sleep.
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Ensure the cot meets British Safety Standards (BS EN 716-1:2017).
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Regularly check for loose screws or worn parts.
By keeping your cot adjusted correctly and maintaining a safe sleep environment, you’ll support your baby’s development while ensuring restful nights for both of you.
Final Thoughts
Lowering your cot isn’t just a practical step - it’s an important milestone in your baby’s growth. Paying attention to their movements and developmental changes helps ensure they sleep safely and soundly.
At Kidsorium, we’re proud to offer a curated collection of premium cots designed for safety, functionality, and style. Explore our favourites - the timeless Leander Classic Cot in Oak and the sleek Leander Linea Cot - to create a nursery that grows beautifully with your child.
Discover the full Cot Bed range at Kidsorium Here
