Think in Succession, Not in One Weekend

The most common mistake with spring bulbs is treating them as a single job: buy a bag of daffodils in September, plant them in October, enjoy them for three weeks in March and then spend the rest of spring looking at bare soil. The borders that genuinely lift the garden from January to May are not planted with more bulbs, they are planted with bulbs that flower at different times.

So before you buy anything, sketch your border on paper and divide the spring into three slots: early (January to early March), mid (March to mid-April) and late (mid-April to late May). Aim for roughly equal numbers of bulbs in each slot. If one slot is thin, that is where you spend your money this autumn.

It also helps to note where the border catches winter sun. A strip that is shaded in December but baked by April will suit late tulips far better than snowdrops, which need light and drainage while the soil is cold and wet.

Building a Flowering Calendar for Your Border

These are reliable, widely available groups in the order they appear. Plant in generous groups of at least ten to fifteen bulbs rather than dribs and drabs — a scattered handful disappears into the soil.

• January to February: snowdrops, winter aconite and Iris reticulata. Small, cheap and best naturalised in grass or at the front edge of a border where you will actually see them.
• February to March: crocus, dwarf iris and early Narcissus such as the small hooped-petticoat types. These are the ones that carry a border through the last grey weeks.
• March to April: the main daffodil season, plus hyacinths and grape hyacinths. Mix a few scented varieties near a path or a door.
• April to May: tulips, Fritillaria imperialis and Fritillaria meleagris. Tulips give you the strongest colour and the widest choice of heights.
• May to June: alliums, which bridge the gap beautifully into early perennials and leave striking seedheads behind.

Planting Depths and Spacing That Actually Work

The old rule is simple and worth repeating: plant at three times the height of the bulb, measured from the base of the bulb to the soil surface. In practice, that means tulips at 15–20cm, large daffodils at 12–15cm, hyacinths at 10cm, crocus and dwarf iris at 6–8cm, and snowdrops at 8–10cm.

Space bulbs roughly two bulb-widths apart. Closer than that and they compete; much further and you lose the drift effect. If your soil is heavy clay, put a centimetre of grit in the base of the planting hole and a little more around the bulb, and add grit to the backfill. Bulbs rot in waterlogged winter soil far more often than they freeze.

Plant with the pointed tip up and the flat basal plate down. If you genuinely cannot tell which way is up — some fritillaries are awkward — lay them on their side and they will right themselves.

Layering Colour and Height

In a border, bulbs read as a composition of three heights. Put the tallest toward the back: alliums, Fritillaria imperialis and tall late tulips at 50–70cm. The middle band takes mid-height daffodils and hyacinths at 30–45cm. The front edge belongs to crocus, dwarf iris, grape hyacinths and snowdrops at 10–20cm.

For colour, resist the urge to plant one of everything. Pick two or three colours and repeat them. A border of white, soft purple and pale yellow reads as deliberate; a rainbow of twelve varieties reads as a jumble sale. If you want a single bold statement, plant a large block of one tulip — thirty bulbs in one drift is far more powerful than ten each of three kinds.

Remember that coloured foliage counts too. The grey-green of most daffodil leaves and the blue-green of allium foliage are useful, and dark tulip flowers look far better against them than against bare brown earth.

Small Spaces, Pots and Planting Among Perennials

If your border is really a metre-wide strip by a wall, layering in the ground gets difficult. Instead, sink bulbs in pots and drop them into gaps. A 30cm pot takes about fifteen crocus, eight daffodils or five tulips, and you can lift the pot the moment it goes over and replace it with something else. Use a peat-free multipurpose compost with added grit and raise the pots on feet so they drain.

In a mixed border, plant bulbs in the gaps between perennials that are late to emerge. Herbaceous plants such as hardy geraniums and taller asters are barely visible in March, so the bulbs have the space to themselves and the emerging foliage hides the dying bulb leaves later on. Just avoid planting directly on top of crowns you would damage with a trowel.

Finally, keep a note of what you planted and where. A short list on your phone is enough. Two autumns later you will thank yourself when you know exactly which patch is already full.

After Flowering: What Keeps Next Spring Strong

Feed the leaves, not the flowers. Once petals drop, give the border a light dressing of a general-purpose fertiliser and let the foliage die back naturally for at least six weeks. That green leaf is the bulb's only chance to store energy for next year. Cutting it down early is the single fastest way to lose a display.

• Deadhead faded flowers so energy goes into the bulb rather than seed.
• Leave leaves until they yellow and pull away easily.
• Mark clumps with a small cane so you do not dig into them in summer.
• Lift and divide crowded clumps every three or four years, once the foliage has died back.
• Order next year's bulbs in late summer, before the best varieties sell out.

Do that, and each spring your border will start earlier, run longer and look better than the year before.