When to Start Weaning: The Real Signs Your Baby Is Ready for Solids

Current UK advice is clear: solid foods should be introduced at around six months of age, alongside continued breast milk or formula. This is the guidance from the NHS and the World Health Organization, and it's the starting point for everything else in this guide.

"Around six months" is not an arbitrary number. By this age, most babies have developed the physical skills, the digestive maturity, and the head and neck control needed to start managing food safely. Their guts and kidneys are more ready to cope with foods beyond milk, and their tongues have usually lost the strong reflex that pushes solids straight back out.

You'll still meet plenty of people — often well-meaning grandparents — who started weaning at three or four months "and it never did any harm." Advice has genuinely changed, and it changed for good reasons. What we now understand about infant digestion, choking risk, and the protective value of milk in the first half-year has shifted the recommendation later than it once was.

The most important rule underneath all of this: weaning should never begin before 17 weeks (four months), no matter what. We'll come back to why that particular line is non-negotiable.

This is feeding support, not medical advice. If you have any concerns about your baby's growth, development or readiness, your GP or health visitor is the right person to speak to.

The NHS describes three signs that appear together when a baby is genuinely ready for solid food. The key word is together — you're looking for all three at once, not just one.

• They can stay in a sitting position and hold their head steady. Your baby doesn't need to sit completely unaided, but they should be able to hold their head and neck steady and sit upright with a little support. This matters for safe swallowing — food should never be offered to a baby who is slumped or reclined.
• They can coordinate their eyes, hands and mouth. They can look at food, pick it up and bring it to their mouth on their own. This hand-eye-mouth coordination is a genuine developmental milestone and a strong signal that the wider readiness is there.
• They can swallow food rather than push it back out. Younger babies have a tongue-thrust reflex that pushes solids out of the mouth automatically. As this reflex fades, babies become able to move food to the back of the mouth and swallow it, rather than dribbling most of it back down their chin.

When you see all three of these arriving together, and your baby is around six months old, that's your green light. If only one or two are present, it's usually worth waiting a little longer.

Here's where most families get caught out. Several extremely common behaviours look like readiness but are actually just normal parts of babyhood. On their own, none of these means your baby needs solids.

What you notice	What it usually means
Chewing and sucking their fists	A completely normal stage of exploring the world with the mouth, and often linked to teething or self-soothing — not hunger for solids.
Waking more often at night	Night waking has many causes — sleep cycles, developmental leaps, teething, illness, comfort. It is not evidence that milk is no longer enough, and solids do not reliably improve night sleep.
Watching you eat intently	Babies are curious about everything you do. Fascination with your dinner is social interest, not a readiness sign.
Wanting extra milk feeds	Appetite naturally increases during growth spurts and unsettled patches. More frequent feeding is how babies meet those needs — it doesn't mean they've "outgrown" milk.

These four signs — fist-chewing, more night waking, watching you eat, and wanting more milk — are the classic "false alarms." They tend to cluster around three to four months, exactly when the pressure to start early feels strongest. Recognising them for what they are can save you from weaning weeks before your baby is genuinely ready.

The 17-week (four-month) line is the one piece of weaning timing we'd ask you to treat as absolute. Before this point, a baby's body simply isn't ready for solid food, and starting early carries real risks rather than benefits.

• Digestive and kidney maturity. A very young baby's gut and kidneys are still developing. Introducing solids too early asks these systems to do work they aren't ready for.
• Swallowing safety. Before around four months, the tongue-thrust reflex is strong and head control is limited, which makes safe swallowing harder and raises the risk of choking.
• Displacing milk too soon. Milk is the main source of nutrition and protection in the early months. Solids offered too early can displace milk feeds before a baby is ready to make up the difference from food.

Between 17 and 26 weeks there can occasionally be specific reasons a health professional advises starting a little earlier — but that's a conversation to have with your GP or health visitor, tailored to your individual baby, never a default. If nobody has advised you otherwise, around six months is the target.

If your baby arrived early, weaning timing needs a little more thought — and this is one situation where we'd always steer you towards personalised advice.

For many aspects of development, premature babies are assessed using their corrected age: their age counted from their due date rather than their actual birth date. So a baby born two months early would have a corrected age two months behind their calendar age. Readiness for solids often tracks closer to development than to the calendar, which is why the timing for a premature baby can differ from the standard "around six months."

At the same time, readiness signs still matter enormously — some premature babies show them earlier or later than corrected age alone would predict. Because the picture is so individual, the safest approach is to discuss weaning timing with your health visitor, GP or paediatric team, who know your baby's history. They can help you balance corrected age, growth and the readiness signs together.

The one constant remains: no baby should start solids before 17 weeks, whether premature or full-term.

If your baby is showing false-alarm signs but not the real ones, the waiting can feel long — especially when you're being encouraged to "just try a bit of baby rice." Here's what genuinely helps in the meantime.

• Keep offering milk responsively. Breast milk or formula meets all your baby's nutritional needs up to six months. Following their hunger cues, including through growth spurts, is exactly the right response — not a signal to start solids.
• Let them explore mealtimes with you. You don't need food on the tray to include your baby at the table. Bringing them into family mealtimes lets them watch, learn and build the social side of eating before the food itself begins.
• Support their physical development. Plenty of supervised floor time and practice sitting helps build the head, neck and trunk control that underpins safe eating.
• Get your kit and mindset ready. Read up on your approach, whether that's spoon-feeding purées, baby-led weaning, or a mix. Deciding calmly in advance beats scrambling on day one.

When you're ready to plan the next stage properly, our Starting Solids course (£67) walks you through readiness, first foods, gagging and choking, allergens and building a confident feeding routine — all in one place.

It's also worth knowing that starting solids doesn't automatically transform night sleep, despite what you may hear. We unpack that properly in solids and sleep. And if mealtimes have already begun but your baby seems uninterested, our guide to a baby refusing solids may reassure you that early hesitation is normal.

The heart of knowing when to start weaning is simple, even if the noise around it isn't. Look for the three real signs arriving together — steady sitting and head control, hand-eye-mouth coordination, and the ability to swallow rather than push food out — at around six months of age.

Don't be swayed by the convincing impostors: fist-chewing, more night waking, watching you eat and wanting extra milk are all normal babyhood, not readiness. Never start before 17 weeks. And if your baby was premature, or you're simply unsure, let your health visitor or GP help you read your individual baby.

There's no prize for starting first, and no harm in your baby being the last of their group to begin. Waiting until they're genuinely ready makes those first weeks of solids calmer, safer and far more enjoyable for both of you.

This guide is feeding support, not medical advice. For any concerns about your baby's growth, development or readiness, please speak to your GP or health visitor.