A small garden, a balcony or a front step does not give you much room to work with, which is exactly why a single pot should be earning its keep from February to May. Layering bulbs — a bulb lasagne, if you like the shorthand — does that. You plant two, three or four layers at different depths in the same container, and they flower in succession rather than all at once.

The principle is straightforward. Bulbs sit at different levels in the compost: the earliest and smallest near the surface, the latest and largest down at the bottom. Get the order right and one 35cm pot can deliver crocus, daffodils, hyacinths and tulips in turn, each layer emerging as the one above it fades.

Why layering works

Bulbs are patient. A tulip planted 20cm down in November has time to make roots and wait, while the crocus 10cm above it gets on with flowering first. The layers barely compete for light because their seasons hardly overlap.

Root room is the other reason it works. Bulbs send roots downwards, so the deepest ones need the most compost beneath them. Stack them the wrong way round — small bulbs at the bottom, tulips near the surface — and you get a ragged display and tulips that flop.

One thing to watch: bulbs should never sit directly on top of one another. Leave a gap of compost, roughly the depth of your thumb, between each layer.

Choosing bulbs for each layer

Think in threes. A top layer, a middle and a base will give you a long run of flowers without the pot becoming a scrum.

Top layer (5–8cm deep)

• Crocus, in cream, purple or striped.
• Iris reticulata — small, intense blue and very early.
• Muscari, if you like blue.
• Anemone blanda, which spreads itself about happily.

Middle layer (10–15cm deep)

• Dwarf narcissi such as ‘Tête-à-Tête’.
• Hyacinths, which will scent a whole patio.
• Species tulips — smaller, tougher and less prone to sulking.

Bottom layer (18–22cm deep)

Tulips. Darwin hybrids, Triumphs, lily-flowered and parrot types all work. Choose one colour family rather than a mix, so the tulips read as a deliberate finish rather than an accident. If you want a final curtain after the tulips, add a few Allium bulbs at the very bottom and accept that their foliage will look tired by early summer.

The pot and the compost

Wide beats tall. A pot 35–40cm across and at least 30cm deep holds a proper lasagne; anything shallower and the tulips will be sitting on the base.

Drainage matters more than anything else, because bulbs rot in soggy compost. Use a pot with a decent hole, cover it with a few broken crocks to stop the compost washing out, and leave it at that. A thick layer of gravel in the bottom does not improve drainage — it raises the water level inside the pot, which is the opposite of what you want.

For compost, a peat-free multipurpose mix blended with a couple of handfuls of garden compost or John Innes No. 2 gives bulbs something to hold on to. Mix in a slow-release feed at planting if you have it, but keep it modest.

Planting, layer by layer

Wait until late October or November, particularly for tulips. Planting them early, into warm, wet soil, invites disease. Any dry day from late October onwards will do.

1. Half-fill the pot with compost and firm it gently with your knuckles.
2. Set the tulips across the surface, pointed end up, about 8–10cm apart. They can be closer than you would plant in a border.
3. Cover with compost to the middle layer and firm again.
4. Add the narcissi or hyacinths, tucking them between the tulips below.
5. Cover, then set the crocus or irises near the top, just below the surface.
6. Top up with compost, leaving 3cm of clear rim for watering.
7. Water well, label the pot, and stand it somewhere cool and sheltered, out of the worst of the rain.

Move the pot into its final position in late February, before the first shoots become leggy. Once growth starts, keep the compost just moist.

Layering in a border instead

The same idea works in open ground and costs nothing extra. Dig out a patch to spade depth, arrange the tulips at the bottom, backfill, then set the smaller bulbs in the top 10cm. Firm the soil, water once and mark the area clearly — bare ground in January is dangerously easy to dig over or plant on top of.

In a border you can also plant annuals or perennials above. The bulbs do their work below; the summer planting covers the mess above. On heavy clay, fork in grit first, because bulbs hate sitting in a wet sump.

Aftercare that decides next year’s display

Water pots whenever the compost dries at the top. From flowering onwards, a fortnightly liquid tomato feed helps the bulbs build themselves up again.

Deadhead the tulips as the petals drop, but leave the leaves alone. Daffodil foliage needs about six weeks after flowering before it can be cut, or the bulb will not flower the following spring.

Once everything has died back you have three choices. Lift the tulips, dry them and store them somewhere airy; leave everything in the pot and top-dress with fresh compost; or plant the tulips out into a sunny border where, with luck, they will settle and return. Tulips in pots rarely repeat as strongly as they did the first year, so many gardeners treat them as annuals and buy fresh each autumn. That is an honest approach and it keeps the display reliable.

A realistic plan for your first lasagne

Start with one pot this autumn, not five. Three layers is plenty, and a single well-planted container teaches you more than a row of half-hearted ones. If the pot will sit where squirrels and mice patrol, lay a sheet of fine mesh or a layer of grit over the compost to discourage digging.

Choose bulbs you actually like rather than whatever is cheapest. Write the planting date and the varieties on a label, push it in, and forget about it until the shoots appear. By late winter those first green tips will show you whether the layers are timed as you hoped. If the crocus and the tulips arrive together, note it and adjust your choices next year — the beauty of a small pot is that you can start again every autumn at almost no cost and with no heartbreak.

Photo: StockSnap / Pixabay