A small bladder sets the night schedule
In the first weeks, night-time trips are not a training failure. They are biology. A young puppy's bladder is small, her control is immature and she cannot yet hold on through a full human night, however tidy her daytime routine looks. Accepting that timetable at the start protects everyone's temper, because a planned wake-up handled calmly is far less exhausting than lying awake hoping she will settle, followed by a frantic dash and a wet crate to clean.
Make the trip boring, quick and quiet
A night trip should teach her that darkness means toilet and sleep, nothing more. When she stirs, go to her promptly before crying escalates, clip on the lead and carry or walk her to the same patch of garden every time. Stand still, keep your voice low and give her a few minutes to go, using the same quiet cue word you use in the day. When she toilets, praise her softly and warmly, then head straight back inside, resettle her in her bed and leave with the minimum of fuss. No games, no treats tour of the kitchen, no phone scrolling beside her pen, because a puppy who discovers that waking produces company and entertainment will wake for the company.
Set the evening up to reduce wake-ups
What happens before bed shapes the night more than anything you do at three in the morning. Give her last meal with enough time for a toilet trip before bed, lift her water a little before the final outing rather than leaving her to tank up at midnight, and make the last trip out a proper, unhurried chance to empty herself rather than a symbolic thirty seconds at the door. Keep her sleeping place close enough to hear her stir in the early weeks, whether that is a crate beside your bed or a pen nearby, and move it gradually to its long-term spot once she is sleeping longer stretches.
When nights start to stretch, stretch with her
Improvement usually arrives in small, uneven steps rather than one triumphant morning. She may sleep a longer first stretch, wake later, or occasionally go through the night and then need out twice the next night because she drank more or slept earlier. Follow her lead instead of setting her a deadline: if she is consistently waking at the same time out of habit rather than need, you can wait a few minutes to see whether she resettles, but never leave a young puppy crying in genuine need, because the lesson you want is that night waking produces a calm toilet trip, not distress. If she is toileting very frequently through the night, seems uncomfortable, drinks excessively or the pattern is getting worse rather than better over the weeks, check in with your vet, since a urinary problem or another health issue can hide behind what looks like slow training.
Share the rota so nobody burns out
Sleep deprivation is the part of new puppy life that owners underestimate, and it lands hardest when one person silently becomes the night shift. Whoever is on duty should note the times she woke and whether she toileted, because that log is how you spot the stretches lengthening and decide who can stand down. Put the rota and the night log into KinsLe Care Teams, assigning each night's toilet trips to a named family member who can mark them complete with a timestamp, so the broken nights are shared fairly, the puppy gets the same calm routine from everyone, and the whole household survives the first weeks with its sleep and goodwill intact.