If you have ever bought snowdrop bulbs in autumn, planted them carefully, and then waited through the following winter with very little to show for it, you are not alone and you have not necessarily done anything wrong. Snowdrops are one of the few bulbs where the standard autumn planting approach — the approach that works reliably for daffodils, tulips and alliums — is actually the wrong way to go about it. The better method is planting in the green, and once you understand why, it becomes the only way you will want to do it.
Planting in the green simply means planting snowdrops as growing plants rather than as dormant bulbs. In practice this means buying them now, in late winter, when they are either just coming into flower or just finishing, with their foliage still intact and their root system still active. What you will find at garden centres at this time of year is small pots of snowdrops in flower or just past flower — these are what you want. The plant is alive, it has not been sitting in a paper bag drying out since September, and when you put it in the ground it can continue growing without the disruption and uncertainty that a dormant bulb faces when it is asked to rehydrate and establish in autumn soil.
The snowdrop is one of the few plants where buying later in the season, and paying a little more for a pot of growing plants, gives you a significantly better result than buying cheaply in autumn.
The reason dry snowdrop bulbs struggle in Irish conditions comes down to what happens to them between lifting and planting. Snowdrop bulbs are small, thin-skinned and lose moisture quickly. By the time they reach a garden centre in September or October they have often been out of the ground for months, handled through a supply chain, and stored in conditions that accelerate that moisture loss. A daffodil bulb has enough mass and a tough enough skin to survive that process reasonably well. A snowdrop bulb does not. What looks firm in the packet can have already lost the growing point inside it, and no amount of careful autumn planting will recover that. This is not a failure of Irish soil or Irish weather — it is simply the nature of the plant.
When you do plant in the green, the approach is straightforward. Choose a position in partial shade — the base of a deciduous hedge, under a tree where the canopy is bare in winter, or along a shaded border edge. Snowdrops in an Irish garden have no difficulty with moisture — our rainfall takes care of that — but they do want soil that does not become waterlogged and sits in shade rather than full sun once the season moves on. Plant at the same depth the pot suggests, keep the clumps informal rather than regimented, and do not disturb the foliage as it dies back over the following weeks. That dying foliage is feeding next year's flower, so leave it alone until it has fully yellowed and collapsed.
In terms of grouping, the instinct to plant in straight lines or perfectly spaced rows is worth resisting. Snowdrops naturalise most convincingly when they are planted in loose, irregular clumps of varying sizes — three here, seven there, a larger group further along. Repeat those clumps through the area you are working with rather than filling it evenly. Over time the clumps will bulk up and spread of their own accord, and in a few years you can lift and divide them to extend them further. That is how a good drift of snowdrops is built — not in one season but progressively, starting with a well-chosen position and plants that are alive when they go into the ground.