large-cupped daffodil

Large-cupped daffodil (Narcissus 'Professor Einstein') should be watered on a regular basis during the summer months while it is actively growing. An ideal watering schedule is to water the plant deeply but infrequently, so that the top few inches of soil become completely saturated with water. During periods of drought the plant may need to be watered more frequently, such as once or twice a week. During the winter months, the plant should only require occasional watering.

Large-cupped daffodil (Narcissus 'Professor Einstein') plants need full sun to partial shade throughout the day. During the spring and summer months when the days are longer, these plants can take up to 6 hours of direct sunlight. When the days are shorter in the fall and winter, the plant can handle up to 4 hours of direct sun each day. For optimal blooming and overall health of the plant, it’s best to provide approximately 4-5 hours of full sunlight each day.

Large-cupped daffodils (Narcissus 'Professor Einstein') should be pruned after flowering is finished and the foliage has started to die back. This is typically in late spring or early summer. Pruning should include removal of the flower stems, as well as removal of the foliage at ground level. If the plants become crowded in either spring or in subsequent years, some of the foliage may need to be selectively thinned to prevent overcrowding. Pruning should also involve cutting off any unsightly or dead foliage, as well as any foliage that has become infected with disease or is showing signs of colour blotch. Regular deadheading of the flowers (removal of the old blooms) also encourages the plant to produce more blooms.