Why Grass Suits Woodland Bulbs

Nothing says early spring in a British garden quite like a drift of snowdrops pushing through rough grass, or the blue haze of a wood-edge you have created yourself in a shady corner of the lawn. Woodland bulbs and grass are natural partners. Grass gives the bulbs the lightly competitive, dappled conditions they evolved in, and in return the bulbs flower before the grass really gets going.

The trick is that bulbs need their leaves left intact for roughly six weeks after flowering. That is when they recharge the bulb for next year. In a border, those yellowing leaves are an eyesore. In grass, they simply vanish among the growing blades. You get the colour, and the grass does the tidying up for you.

Choosing Bulbs That Naturalise Well

Not every bulb will settle and spread. Look for species and older varieties rather than highly bred bedding types, which tend to exhaust themselves after a season or two.

• Snowdrops — single-flowered species such as Galanthus nivalis, happiest in light shade and soil that stays reasonably moist.
• Native bluebells — Hyacinthoides non-scripta, deep violet-blue with arching stems and a honey scent. Avoid the Spanish bluebell, which hybridises readily and swamps the native over time.
• Small daffodils — the wild daffodil or compact cultivars that stand up to wind and rain without collapsing across the lawn.
• Crocus and winter aconite — early, inexpensive and generous, perfect for a short burst of colour in February.
• Snake's head fritillary — Fritillaria meleagris, for a damp patch that stays wet through winter.

Lifting Turf: The Method That Works

You can push bulbs into grass one at a time with a bulb planter, but for a proper drift the turf-lifting method gives far better results and takes less time than you would think.

• Choose a dryish day in September or October, when the soil is workable but not sodden.
• Mark out the area with sand or string. Irregular, flowing shapes look more natural than neat rectangles.
• Cut around the edge with a half-moon edger or a sharp spade, to a depth of about 5–8cm.
• Slide the spade underneath and roll the turf back like a carpet, laying it on a tarpaulin so it does not dry out.
• Fork over the exposed soil lightly, then scatter the bulbs by hand. Do not set them in rows — toss them gently and plant them where they land.
• Roll the turf back, firm it down with your heels or the back of a rake, and water if the weather stays dry.

One square metre will take roughly 100 small bulbs or 25–30 daffodils. Repeat the process in a new patch each autumn and the drift will thicken on its own.

Depth and Spacing

The old rule holds good: plant at two to three times the bulb's own depth. In grass, err on the deeper side, because the soil is less disturbed and the bulbs sit more safely.

• Snowdrops: 5–8cm deep, about 5cm apart.
• Bluebells: 10cm deep, about 10cm apart.
• Daffodils: 10–15cm deep, about 10–15cm apart.
• Crocus: 5cm deep, about 5cm apart.

Point the bulbs upwards — flat base down, pointed shoot up. If you honestly cannot tell which end is which, plant them on their side; they will right themselves.

Timing: Dry Bulbs and 'In the Green'

Daffodils, crocus and fritillaries are best bought as dry bulbs and planted in September and October, while the soil still holds some warmth. Snowdrops and bluebells establish far more reliably if bought 'in the green' — lifted and sold in leaf, usually between February and April — and planted straight away. They tend to flower the following spring rather than sulking for two or three years.

If autumn planting has passed you by, pot-grown bulbs in spring are a workable if pricier fallback. Knock them out of their pots and tuck the whole rootball into the slot left by the lifted turf.

Looking After the Display

The single most important job is patience with the mower. Leave the grass uncut for about six weeks after the last flower fades, until the leaves have yellowed and flattened. For daffodils that usually means late June; for bluebells, mid-June. Then set the mower high for the first cut and drop it gradually over the following weeks.

Do not knot or tie the leaves. It may look tidy, but it reduces the leaf area exposed to light and weakens the bulb for the following year. A light scatter of general-purpose fertiliser or bonemeal in early spring helps, and a thin mulch of leafmould over the area in autumn keeps the soil in good heart.

Finally, let the grass grow a little longer through summer in these patches. A slightly rougher, meadow-ish sward hides the ripening foliage, feeds the soil and gives the bulbs exactly the conditions they need to multiply year after year.