Daffodils contain phenanthridine alkaloids and calcium oxalate crystals that make them toxic to both humans and animals. Fatalities are possible if large quantities of bulbs are eaten, and severe skin reactions can occur when the bulbs are handled. Daffodils will not bloom more than once in a season, so when you notice the petals fading, allow the foliage to turn yellow and dry up. Do not cut the foliage! It’s important to leave the leaves, as they absorb sunlight that helps feed the bulb for next year’s blooms. Some gardeners like to use this opportunity to dig up the bulbs, then save them until fall replanting time. This approach allows the space vacated by fading daffodils to be filled with other plants for the summer. Most gardeners, however, leave the daffodil bulbs in the ground, lifting and dividing every fourth year or so. Daffodils require little care, other than watering during the active growing season and topdressing with bulb fertilizer in instances where the bulbs are not producing ample flowers.
Light
Daffodils thrive best when planted in full sun (at least six hours), though they can withstand a bit of partial shade or dappled light. These are spring bloomers that often are done with their display by the time deciduous trees have leafed out, so they can work well when planted in areas that will be shady by midsummer but which have plenty of sun in the early season.
Soil
Daffodils prefer a neutral to slightly acidic soil pH of around 6.0 to 7.0 . They thrive in rich, moist soil but, as with most bulbs, they require excellent drainage or they will rot. Daffodils should not be allowed to sit in waterlogged soil.
Water
Daffodils like to be watered regularly in the spring and fall. But stop watering in mid to late spring, beginning about about three to four weeks after the flowers fade. Daffodils go dormant during the summer and prefer a drier soil at this time.
Temperature and Humidity
Daffodil hardiness will vary slightly depending on variety, but most daffodils are reliable within USDA hardiness zones 4 to 8. Most daffodils need a cold dormant period, which is why they’re planted in the fall. Most types are not well suited for warm southern climates unless planted as annuals. However, certain divisions of daffodils (such as division 8, the Tazetta group) will grow in warmer climates, especially if given sufficient water. Overall, daffodils do equally well in humid and arid atmospheric conditions, provided soil moisture is appropriate.
Fertilizer
Daffodils are pretty self-sufficient, but if you have poor soil or the plants are not flowering as much as they should, top dress with bulb food when the leaves first emerge. Lightly feed again when they flower. For the amount to use, follow the product label instructions.
Types of Daffodil
Breeders have classified daffodils into 13 different divisions, with many, many cultivars within each division, based on the form of the flower. The divisions include:
Division 1, Trumpet: The Trumpet daffodil boasts a center cup at least as long as its petals, with one bloom per stem.Division 2, Large-cupped: The cup on this daffodil variety is more than one-third the length of the petals, but not as long as them, with one bloom per stem.Division 3, Small-cupped: As the name implies, the cup on this variety is no more than one-third the length of the petals, with one bloom per stem.Division 4, Double: This daffodil varietal features clustered cups and petals, with one or more blooms per stem.Division 5, Triandrus: The flowers on the Triandrus daffodil have a hanging bell shape, usually boasting two or more blooms per stem.Division 6, Cyclamineus: This daffodil varietal features swept-back petals and one bloom per stem.Division 7, Jonquilla: The Jonquilla daffodil has small, fragrant flowers with flat petals and narrow leaves. Typically, you’ll see one to five blooms per stem.Division 8, Tazetta: Fragrant clusters of florets dot the Tazetta daffodil, with anywhere from three to 20 blooms per stem. The leaves and stems are also broader than usual.Division 9, Poeticus: Pure white petals surround a flattened, crinkled cup on the Poeticus daffodil. Its cups generally have green centers circled in yellow and rimmed with red, and one fragrant bloom per stem.Division 10, Bulbocodium: This daffodil varietal features small petals and a “hoop petticoat” shaped cup.Division 11, Split-cupped: The cup on this varietal is split open, usually at least halfway.Division 12, Miscellaneous: These do not fit into other categories, including inter-division hybrids.Division 13, Species, wild variants, and wild hybrids.
All divisions may include cultivars described as “Miniature.” These have the same features as their full-size counterparts but have smaller blooms, usually less than 2 inches in diameter.
Pruning
As the blooms fade, the top portion of each flower stem can be removed to prevent seed formation. But leave the foliage in place until it begins to yellow, as the plants are restoring the bulbs during this time.
Propagating Daffodil
The easiest way to propagate daffodils is by lifting and removing the offshoot bulbs that form underground. This division is usually not necessary for the health of the plants, but it can be done every fourth year or so if colonies are becoming overgrown. Here’s how to do it: Be aware that very small offset bulbs will likely take several years to develop the vigor to produce flowers. Small bulbs will produce foliage for several years as they gain size, then begin to flower once they are sufficiently large.
How to Grow Daffodil From Seed
It can take as much as five or six years for daffodil seeds to grow into plants that have viable bulbs, so this method is rarely undertaken, except by professionals or very serious amateurs experimenting with hybridization. But should you have the patience to try it, seed propagation begins with harvesting seeds from the marble-sized pods that are left behind after daffodil flowers fade. When these seed pods shrivel and turn brown, you can break them open to extract the seeds inside. Save the seeds until fall, then plant them about 1/2 inch deep in small pots or seed trays filled with potting mix or seed starter mix. Set the pots in a sheltered outdoor location to receive a winter chill period. In the spring, the seeds will germinate and sprout into tiny, grass-like seedlings. Continue to grow them in their small pots for at least three years. After this point, the plants will have small bulbs that will need to be systematically repotted into increasingly large containers each year. By year five or six, you will have bulbs that are sufficiently large to plant in the garden.
Potting and Repotting Daffodils
Daffodils can grow well in containers for up to three years if the pot is deep enough for their roots to fill out. With proper timing, you can grow potted daffodils for indoor winter flowering, simply by controlling the timing of the chill period. To successfully plant daffodils in containers, follow these easy steps: When the leaves die off, place the pot on its side and let it dry out. Then start all over again. Potted daffodil bulbs can bloom for two to three years in the container, but will do better if you move them to a spot in the ground and pot up fresh bulbs each year. While they are in the pot, however, remember that daffodils will need the required chilling cycle each year. They cannot be grown as perpetual houseplants.
Overwintering
When planted in their acknowledged hardiness range, daffodils usually don’t require any winter protection against cold. But overwintering recommendations can very according to region. In regions with very cold winters but where there is no snow cover, growers often find that a layer of mulch will help ensure the survival of the bulbs.
Common Pests & Plant Diseases
Daffodils are famous for being almost immune to serious pest and disease issues. But on rare occasions, one of the following problems may occur: Bulb rot is possible if daffodils are planted in badly drained soil. Daffodils can also be affected by narcissus yellow stripe virus, which causes brown and yellow stripes on the foliage. Affected plants will need to be removed and destroyed.
Narcissus flies lay eggs at the base of plants, which hatch and cause larvae to bore down into bulbs. You may well notice soft bulbs with worms inside during routine bulb division. Affected bulbs will need to be thrown away.Bulb mites cause weakening of daffodils and are most likely with daffodils being grown indoors for seasonal display. Various spray pesticides will control them.Nematodes cause lumpy lesions on the foliage. There is no treatment for these microscopic soil worms, and you may even need to give up growing daffodils in soils where they are present.
How to Get Daffodils to Bloom
Daffodils are usually reliable spring bloomers if they have their basic cultural needs met, as outlined above. When daffodils fail to bloom, look for one of these reasons:
Daffodil foliage was cut back too soon. Daffodil foliage generally persists for four to six weeks after the blooms fade, and during this time, the bulbs are being replenished as the leaves continue to conduct photosynthesis. If the foliage is cut back too soon, the result can be weakened bulbs that fail to bloom the following spring. This can be a notable problem when daffodils are naturalized in a lawn setting; if you mow your lawn too early in the spring, it can cut away the foliage before it has a chance to replenish the bulbs.Bulbs were planted upside down. If you planted good large bulbs but they failed to flower in their first season, it’s possible they were planted upside down. The proper orientation: pointy side facing up.Bulbs are too young. Especially after division, the smaller offset bulbs often do not flower for a year or two. With extremely small bulbs, it can take even longer.Soil is poor. Daffodils don’t require terribly rich soil, but they do need some nutrition. Topdressing with a handful of bulb fertilizer in the fall may help prompt flowering the following spring. Be careful, though, as too much fertilizer can damage daffodil bulbs.Not enough sunlight. As surrounding shade trees grow larger, increasing amounts of shade may cause your daffodils to bloom less. Pruning surrounding bushes and trees to restore sunlight may help.
Common Problems With Daffodil
Daffodils are usually very reliable plants that cause few problems. One common complaint, though, is that the plants are not at all attractive once the flowers fade, leaving gaps in the landscape and wilted, floppy foliage. This is unavoidable, as it is necessary to allow the foliage to die back naturally completely before removing it. One solution is to plant daffodils within gaps between other late-developing perennials, whose leaves will gradually cover the gaps left once the daffodil foliage has finally died back.
