The Seed Tin Reckoning: Turning 2026's Impulse Buys into a Sensible 2027 Balcony

Every gardener owns a drawer, tin or shoebox that functions as a small museum of good intentions. Mine is a Fortnum & Mason biscuit tin I inherited from my nan; it now holds forty-one packets of seed, three perishing elastic bands and one dried-out chilli of unknown vintage. Opening it in November is a bit like reading your own messages from a Saturday night in March: plenty of enthusiasm, and a few choices you would rather not explain.

So this is the ritual I now do every November, usually on the kitchen table with a mug of tea going cold beside me. It takes under an hour. It has saved me a fortune in seed I would never have sown, and it has stopped me making the same three mistakes every single spring.

First, the confession

Tip the tin out. Count the packets. Let the number land.

Mine, this year, included: three packets of cucamelons (I grew two plants, ate one fruit, and gave the rest to a neighbour who has not made eye contact since); a 2019 packet of giant sunflower seed, still unopened, still optimistic; four separate lots of basil, because apparently I black out in garden centres; and a freebie packet of something labelled simply 'mixed', which is the horticultural equivalent of a mystery bag.

There is no shame in this. Seed is cheap, catalogues are beautiful, and a January evening is long. But there is also no point pretending a north-facing balcony the size of a bathmat can absorb forty-one packets of ambition.

The honest audit: light, wind, space

Before you sort anything, spend ten minutes on the balcony itself. Not in June fantasy — on a grey November afternoon, which is the truth of the thing.

Go out at around eleven and again at two. Note where the sun actually lands and for how long. Note where the wind hits hardest — for most UK flats it is the corner nearest the drainpipe, where the prevailing south-westerlies funnel between buildings. Note how much floor space is left once the chair, the doormat and the recycling are accounted for.

Then measure. A few pots, honestly sized, will beat a forest of tiny ones every time. Write the numbers down on a bit of card, and keep that card with you while you sort. It is much harder to talk yourself into sweetcorn when the card says forty centimetres of depth.

Three piles: keep, swap, compost

Now the sorting. Newspaper down, tin open, and everything into one of three piles.

Keep — anything bought in the last two years, anything compact enough for a pot, anything you will genuinely eat, smell or look at. Salad leaves, radish, chard, dwarf beans, chillies, herbs, nasturtiums, sweet peas. Small, useful, cheerful.

Swap — duplicates, plus everything that needs more room than you have. Sweetcorn, courgettes, maincrop potatoes, pumpkins, anything described on the packet as 'vigorous'. These are not failures; they are currency. Local allotment societies, community garden seed swaps, library seed libraries and the village hall all do a brisk trade in January. Take your spares along, come home with something you will actually grow.

Compost — damp, mouldy, mystery or genuinely ancient. Anything you cannot identify does not deserve a summer of your attention.

The kitchen-roll test

Before you bin the old stuff, do one quick check. Fold ten seeds into damp kitchen roll, seal it in a labelled bag, and leave it somewhere warm for a week to ten days. Count what sprouts. Anything below about half is not worth the compost, however fond you are of the label.

It feels slightly ridiculous and it is entirely worth it. Nothing sours a spring morning like a pot of bare soil where the 2019 tomatoes should have been.

Matching the survivors to a real plan

Here is where the tin becomes a plan rather than a hoard. Split the keep pile into three groups.

Indoors and windowsill — basil, cress, microgreens, and the chillies that need an early start in February on a warm windowsill. This is where the indoor growing earns its keep, and it is also the bit that gets you through to March without losing your mind.

Balcony containers — the workhorses. Two or three bush tomatoes ('Tumbling Tom' and 'Maskotka' both behave themselves in pots), a chilli or two, a trough of cut-and-come-again salad, one pot of dwarf beans, and herbs you will actually pick.

The someday pile — asparagus, rhubarb, anything with a three-year horizon. Be ruthless. Someday is not a container size.

What 2027 actually looks like

Once you have been honest, write the plan on an index card and tape it inside the tin lid. Mine reads: two tomato plants, two chillies, one salad trough sown fortnightly from April, two herb pots, one pot of 'Purple Tepee' beans, and a scramble of nasturtium and calendula for the bees and for morale.

Dates matter more than varieties. Chillies on the windowsill in February. Tomatoes in March, indoors. Salad from April, a pinch every fortnight rather than all at once. Beans in May, once the nights have stopped being spiteful. Nothing new after July except autumn salad.

The one rule I would recommend

No seed shopping until March. Put the catalogues in a drawer and start a wish list instead. By the time March arrives, half of it will look ridiculous, and the other half will be exactly what your balcony can take.

The tin goes back in the cupboard

Add a sachet of silica gel, or a small twist of rice in a paper envelope, and store the tin somewhere cool and dark. Photograph the keep pile so you know what you have. Then put the kettle on.

That is the whole ritual, and the point of it is not tidiness. It is that a seed tin, sorted honestly in the gloom of November, stops being a to-do list of failures and becomes a plan with the wrapping paper off. On a small balcony in a wet British winter, that is about as much cheer as anyone can reasonably ask for.