Every September I do the same slightly absurd thing: I sit on the floor of the balcony with a bag of compost, a bag of grit and a paper sack of bulbs, and I plant flowers for a version of myself who is six months away and probably in a worse mood. It takes an hour. It is the highest-return hour of my gardening year, and it requires no beds, no digging and no talent whatsoever — bulbs arrive with their own packed lunch. Everything they need for their first flower is already inside them.
Autumn is when bulb conversations start up everywhere, usually framed around gardens. But pots are where bulbs genuinely shine, especially in small spaces, because you can put them exactly where you'll see them: by the door, at eye level on a railing shelf, on the windowsill you stare out of while the kettle boils.
Plant the narcissi now, and hold the tulips
The general rhythm is easy to remember. Daffodils and narcissi, plus the small early things — crocus, muscari, snowdrops, scilla — want to go in while the soil still has some warmth in it, because they root through autumn. September into October is their window, and earlier is better than later for narcissi in particular.
Tulips are the exception and the one that trips people up. They prefer to go in cold, later in autumn, once the weather has properly turned. If you plant them in warm compost they're more prone to trouble, so buy them now if the varieties you love sell out fast, but keep the bulbs somewhere cool, dry and dark and plant them when you've stopped enjoying being outside.
Choose firm bulbs with no soft patches and no mould, and pick the biggest ones you can afford. Bulb size correlates fairly directly with flower size, which is one of the few times shopping logic is that simple.
Layer the pot like a lasagne
This is the trick that turns three pots into a six-week display. In one deep container, plant in layers: the largest, latest bulbs at the bottom, the smallest, earliest at the top.
Start with a good depth of drainage material — broken crocks, coarse grit — then compost with a generous handful of grit mixed through, because bulbs rot in wet, airless soil far more often than they die of cold. Set your daffodils near the bottom, roughly three times their own height deep, pointy end up, close but not touching. Cover with compost. Add tulips as a middle layer if you're using them, offset from the daffodils rather than directly above. Cover again. Finish with crocus or muscari in the top few centimetres, then a last layer of compost and a mulch of grit to keep the surface from turning to mud.
Choose the deepest pots you own — bulbs in shallow containers dry out fast in a March wind — and make absolutely sure there are drainage holes. Terracotta is beautiful but can crack in a hard frost; if you have a cold, exposed balcony, a heavier plastic or glazed pot tucked against the wall will survive better.
Then mostly leave them alone
Water the pot once after planting, then let the weather take over. Through winter your job is essentially to check the compost isn't bone dry and isn't sitting waterlogged. Move pots to the sheltered side of the balcony, off cold stone if you can — a couple of pot feet or even a scrap of timber underneath keeps the base from freezing solid in a puddle.
Squirrels and other diggers are the real balcony nuisance. A square of chicken wire laid over the compost and weighted at the corners, or a layer of sharp grit on top, usually settles it. Come February you'll see noses of green, and from then on it's daily entertainment.
When is it too late to plant spring bulbs?
Later than most people assume. Narcissi and small bulbs are happiest planted early in autumn, but if a bag turns up at the back of a cupboard in December and the bulbs are still firm, plant them anyway — they may flower slightly later or shorter, and that is far better than the certainty of a bin. Tulips are genuinely forgiving of late planting and can go in right up to the turn of the year in mild areas, as long as the compost isn't frozen.
Do bulbs in pots need watering over winter?
Occasionally, yes — pots dry out in a way open ground doesn't, especially under a balcony overhang where rain never reaches. Check by pushing a finger into the compost every couple of weeks: if the top few centimetres are dry, give it a modest drink on a mild day, and never leave the pot standing in a full saucer of water.
What to do once they've flowered
Let the leaves die back naturally rather than tidying them away — that's how daffodils and narcissi build next year's flower. Deadhead the spent blooms, feed once with a general fertiliser, and you can keep the same pot of narcissi going for years. Tulips in containers are less reliable in their second season; many of us treat them as a one-year luxury and plant fresh, which is worth knowing before you feel you've failed at something. Either way, next September you'll be on the floor with a bag of grit again, and you'll be glad.
