Planting time
Plant spring-flowering bulbs in early autumn, preferably by the end of September (when many established bulbs are beginning to develop new roots). Tulips are best planted in November. Plant summer-flowering bulbs in early spring; autumn-flowering by late summer.
‘Dry’ bulbs
Most bulbs are acquired and planted when dry i.e. in a dormant, leafless, rootless state. Plant as soon as possible. They may flower poorly following late planting or lengthy storage.
Conditions required
Most hardy bulbs are from dry summer climates and prefer a warm sunny site with good drainage. Bulbs from cool, moist woodland habitats need similar garden conditions. Soil conditions are important. Most bulbs have only a short period in leaf before dying back. Improve light or sandy soils with humus, incorporated below bulb depth; heavy soils with sharp grit or sand.
Planting
Plant in groups. Excavate a hole to the required planting
depth. Fork in some bonemeal then space them at least twice
the bulb’s own height and width apart. Carefully replace
the soil and gently firm with the back of a rake. Plant to
two or three times bulb height i.e. the tip of a 5 cm (2in)
high bulb should be 10-15 cm (4-6in) below soil level.
Further information