Why egg numbers shift with the seasons

One of the loveliest things about keeping hens in a small garden is the daily hunt for eggs. One of the most confusing is the sudden change in how many you find. A trio of hybrids can give you three eggs a day in May and nothing at all in the first week of December, and still be perfectly healthy. Laying is not a constant tap; it is a biological rhythm driven by light, age, nutrition and a handful of everyday stresses. Once you understand the rhythm, you stop worrying about the quiet weeks and start planning around them.

A hen is born with all the yolks she will ever release, stored as tiny follicles in her ovary. Whether a follicle matures into an egg depends largely on signals from her pituitary gland, which reads day length through the pineal gland. Long days say "good time to raise chicks"; short days say "save your strength". Everything else – feed, age, moult – works alongside that signal.

Day length: the master switch

In the UK we swing from around eight hours of daylight in late December to almost seventeen in June, and hens respond to the trend, not just the total. Laying typically picks up from late January as days lengthen and peaks between March and July. It then tails off through late summer and autumn, and most flocks stop or dwindle between November and January.

Hens are most productive when they receive roughly 14 to 16 hours of light a day. You can nudge this with a small light on a timer, but do it thoughtfully:

• Add light in the morning, not the evening, so birds go to roost naturally with the fading daylight and do not stay up getting hungry or cold.
• Top up to about 12 to 14 hours rather than pushing for maximum output. Gentler supplementation keeps hens in better condition and gives you a reliable trickle of winter eggs.
• Always leave at least eight hours of uninterrupted darkness in every 24-hour cycle.
• Never light young birds before they reach their natural point of lay; you can trigger problems with their reproductive development.
• If you keep pure breeds or rare breeds, consider skipping artificial light altogether. Heritage hens on a natural cycle often lay well for five or six years rather than burning out in two.

Age and the laying curve

A pullet usually comes into lay between 18 and 24 weeks, depending on breed and on when she hatched. Point-of-lay hybrids such as a Bluebelle or a Sussex Star start earlier and lay harder; pure breeds often start later and lay fewer but larger eggs.

• First year: expect 280–320 eggs from a good hybrid, 180–250 from a pure breed.
• Second year: roughly a 10–20% drop, plus a moult that pauses production for six to twelve weeks.
• Third year onward: fewer, often bigger eggs, and more frequent broody spells.

Small eggs at the start and the odd wrinkly or double-yolker are normal while her system calibrates. Equally, a hen does not lay every day: a typical cycle is one egg roughly every 25 hours, which is why eggs creep later in the day and why she eventually skips one.

Feeding for eggs, not just for fullness

Nutrition is the factor you control most easily, and it matters most in winter when natural foraging is poor. A laying hen needs a proper compound feed, not scraps.

• Feed a layers' pellet or mash at around 16–17% protein as the bulk of the diet. It is balanced, so hens cannot pick and choose.
• Offer oyster shell grit separately so each bird takes the calcium she needs. Crushed shell in the feeder is better than mixing it into pellets.
• Provide insoluble grit too, to help the gizzard grind food.
• Keep treats – corn, greens, mealworms – to no more than 10% of daily intake. Too much corn dilutes protein and can reduce laying.
• During the moult, a small protein boost (a few mealworms or a higher-protein feed) helps feathers regrow faster.

Water matters more than many keepers realise. A hen laying a 60g egg is passing a lot of liquid, and a frozen drinker on a January morning will stop production before any feed issue does.

Moult, broodiness and the autumn reset

Between late summer and November most hens replace their plumage. Feathers are about 85% protein, so a moulting hen diverts resources from the ovary to the feather follicles. Laying stops, sometimes for a few weeks, sometimes for three months. This is normal and not a sign of illness, though it is worth checking for red mite, worms and lice if she looks dull, thin or reluctant to move.

Broodiness is the other great pause. A broody hen sits tight, plucks her breast and barely eats. If you do not want chicks, lift her gently from the nest several times a day, keep the coop cool and airy, and be patient – it can last three weeks.

Managing expectations through the year

A realistic small-garden flock of, say, four hybrids might give you twelve to sixteen eggs a week in late spring, six to eight in September, and one or two in the darkest fortnight of the year – or none at all. That is not failure; it is a hen being a hen.

Plan for the lean months by preserving the glut: freeze surplus eggs beaten in a tub, or make lemon curd, mayonnaise and pickled eggs while supplies are plentiful. Keep stress low – steady routine, dry bedding, protection from foxes and a covered run for wet days – and your birds will reward you with years of steady, seasonal laying rather than a short burst of unsustainable production.