Autumn Daffodil

Water sparingly during fall bloom and winter foliage growth, allowing the top 2 inches of soil to dry out between waterings to prevent bulb rot. Cease watering entirely once foliage dies back in late spring, keeping bulbs completely dry during their summer dormancy period.

Plant in full sun to partial shade, with at least 6 hours of direct sunlight daily during the fall and winter growing season for optimal flowering. In hotter Mediterranean climates, light afternoon shade during summer dormancy does not harm dormant bulbs.

Requires sharply drained, sandy or loamy soil with a neutral to slightly alkaline pH, as poorly drained heavy clay soils will quickly cause bulb rot. Amending planting sites with coarse sand or grit improves drainage for long-term bulb health.

Apply a balanced, slow-release bulb fertilizer in early fall just as flower spikes begin to emerge, and again in early spring to support foliage growth and bulb energy storage for the next year. Avoid over-fertilizing with high-nitrogen formulas, which promote excessive foliage at the expense of blooms.

Thrives in USDA hardiness zones 6 to 9, tolerating winter lows down to -10°F (-23°C) when bulbs are planted at the recommended depth of 4 to 6 inches. Hot, dry summer temperatures are required for successful dormancy, making the plant poorly suited to cool, wet summer climates.

Remove spent flower stalks after blooming to prevent seed formation, which diverts energy from bulb growth. Allow foliage to die back completely on its own in late spring before trimming it away, as the leaves photosynthesize to replenish bulb energy stores.

Propagate by dividing mature bulb clumps every 3 to 4 years in late summer, during the dormancy period before new growth emerges. Separate offset bulbs from the parent bulb and replant immediately at the same depth, spacing bulbs 3 to 4 inches apart.

Tolerates low to moderate humidity levels, with no special humidity requirements during its active growing season. High summer humidity during dormancy increases the risk of bulb rot, so good air circulation around planting sites is recommended.

For container-grown specimens, repot every 2 to 3 years in late summer during dormancy, refreshing the potting mix with additional grit to maintain drainage. Ensure pots have ample drainage holes, and avoid overpotting, as crowded bulbs tend to flower more prolifically.