Daffodil Summer Dormancy: Lifting, Dividing and Storing Bulbs

Dormant does not mean inactive

Once the foliage has gone, the roots die back and the bulb sits in the soil looking like a dry onion. It is not idle. During the warmth of summer, inside that bulb, the growing point is differentiating into next spring's flower. By late summer the flower for the following year already exists in miniature within the bulb, complete with petals.

That is why summer conditions matter so much. Warm, dryish soil is what the process wants. Soil that stays cold and sodden through summer interrupts flower initiation and invites basal rot at the same time, which is why daffodils in a heavy, badly drained bed decline even when everything else is right.

It is also why summer is the only safe time to move them. Lifting a daffodil in growth costs you the following year. Lifting one in dormancy costs you nothing if the bulb is handled properly and put back in reasonable time.

Leave them in the ground unless there is a reason not to

Unlike tulips, daffodils are not lifted routinely. In a suitable spot they persist and increase for decades, and every lift is a disturbance with some risk attached. The default answer to whether you should lift is no.

There are four situations where lifting is the right call. The clump has become congested and blind, and needs dividing. You want to move or redistribute the planting. The ground is going to be waterlogged or heavily cultivated over summer. Or the clump has a suspected bulb fly or eelworm problem and you need to see the bulbs to judge it.

Absent one of those, a clump planted at proper depth should go five to seven years before it needs attention, and in poor thin soil or grass, considerably longer. Bulbs in rich, well-fed ground bulk up and split faster, so a border planting usually needs dividing sooner than the same daffodils naturalised in a meadow.

Lifting and dividing a congested clump

Timing is a compromise. Wait too long and you cannot find the bulbs; go too early and the foliage has not finished feeding them. The right moment is as the leaves turn yellow and flop but before they have disappeared, so the clump is still marked but the bulb has taken back what it can.

1. Fork wide and deep Push a fork in a foot (30 cm) outside the visible clump and lever up the whole mass in one go. Daffodils pull themselves deeper over the years, so go further down than you expect. A spade through the middle of a clump slices bulbs and each cut one is an entry point for rot.
2. Separate only what comes apart willingly Twist offsets away from the parent bulb by hand where they separate cleanly at the basal plate. If two bulbs are still firmly joined, leave them as a pair. Forcing them apart tears the base and those are the ones that rot in storage.
3. Sort by size and inspect every bulb Squeeze each one. Firm and heavy goes back in. Soft, light or hollow-feeling means bulb fly damage; a brown, sunken, slightly spongy basal plate means basal rot. Both go in the bin, not the compost pile. Grade the survivors into flowering-size bulbs and small offsets.
4. Replant the large bulbs immediately if you can Straight back into prepared ground at full depth and proper spacing is much the best option. Bulbs never really want to be dry. Plant the small offsets somewhere out of the way as a nursery bed; they take two or three years to reach flowering size.
5. Clean up the old site Remove every scrap of old foliage, papery tunic and loose small bulb from the excavation. Debris left in place carries basal rot spores and gives eelworm somewhere to persist.

Wear gloves. Narcissus sap contains calcium oxalate crystals and causes an itchy contact dermatitis on the hands and forearms that can take days to settle, and it gets worse with repeated exposure.

Storing bulbs if you cannot replant at once

Replanting immediately is always better, but if you are redesigning a bed and cannot put them back yet, daffodils will hold for a few weeks in the right conditions. The failure modes are drying out and rotting, and they pull in opposite directions, so airflow is the thing to get right.

Spread the bulbs in a single layer in an open tray or a net bag, somewhere dry, shaded and airy at ordinary summer temperature. Never a sealed plastic bag, never a warm greenhouse, never a damp shed floor. Check them every couple of weeks and pull out anything that has softened, because one rotting bulb will take its neighbors with it.

Get them back in the ground by early autumn at the latest. A narcissus bulb held dry for a whole season shrinks noticeably, and what goes back in the following year is a bulb that has lost a year of size and will not flower until it has regained it.

Pots over summer, and what to record

A pot of daffodils left dormant in its compost bakes far hotter than open ground and dries to dust. If you are keeping the bulbs, either tip them out and plant them in the garden once the foliage has died, or move the whole pot to a shaded spot, on its side so rain cannot fill it, and repot into fresh compost in early autumn. Leaving a pot standing in a sunny corner all summer is the usual reason potted daffodils fail to return.

Record the date you lifted each clump, how many flowering-size bulbs came out of it, how many you discarded and why, and where the offsets went. The discard count in particular is the number that tells you whether you have a bulb fly problem building up, and it only means something if you have last year's figure to compare it with.

Mark the position of every dormant clump you left in the ground, with a label or on a plan. From early summer to late winter there is nothing above ground to see, and a fork driven through a clump you forgot about is the most avoidable loss in the whole daffodil year.