
by Margaret
Wolf
Colorado State University Cooperative Extension
Master Gardener
Larimer County
A splash of bright, cheery daffodils appears in April
to celebrate the new growing season. Daffodils are hardy, versatile and reliable
performers along the Front Range. These plants blossom freely year-after-year
with minimum maintenance. Once established, daffodils generally thrive for many
years and often spread into larger clumps from small offset bulbs. These new
bulbs need to grow for several years before they are mature enough to produce
blooms.
The scientific name for the plants is Narcissus. There are 12 classes of narcissus,
classified by flower type. There are more than 70 species and 25,000 cultivars.
These plants include such diverse types as the common trumpet, small-cupped,
large-cupped, double-flowered and miniatures. Flower color ranges from the traditional
bright golden yellow to lemon yellow, ivory, snow white, orange, pink and red.
Daffodils are classified according to when they bloom—early, mid-season
or late-season. Because daffodil blooms last two to three weeks, a gardener
can extend the blooming season by judicious selection of varieties from each
grouping. For bulbs to make the most impact, gardeners plant dozens of bulbs
in a single planting.
When buying at a local garden center, purchase high-quality bulbs, which produce
the largest and longest-lived blossoms. Select large, firm, double-nosed bulbs
that are free from any obvious defect or disease. “Double-nosed”
is a term given to bulbs containing two growing points, and should result in
multiple flowers the first year after planting. Inspect the bottom of the bulb
for any sign of fungus, a white powdery substance; reject those bulbs. Many
highly reputable bulb vendors are available by mail-order. These venders may
offer the most variety.
The most demanding need of daffodils is good soil drainage. Bulbs planted in
a poorly drained location weaken quickly, fail to flower after the first year,
and develop bulb rots. Incorporation of organic matter into the soil helps improve
drainage. Daffodils should have sunlight in order to develop the bulb and flower
each year—ideally five hours of sunlight every day. Since much of their
growth and photosynthesis occurs early before trees foliate, they may be planted
under or near trees. Avoid planting daffodils on the north sides of buildings
or near tall, dense evergreens.
When planting, space daffodils six to 12 inches apart, depending on the cultivar
selected and flowering effect wanted. Fuller displays of flowers require closer
spacing and more frequent division of the bulbs. Daffodils should be planted
so the base of the bulb is about six inches below the soil surface. Daffodils
must have good moisture to flower well. If rainfall is sparse, water the bulbs
well after planting and throughout the year. Application of organic mulch can
help retain moisture, as well as keep the soil temperature uniform and warm.
During and after flowering, daffodils require adequate water.
Daffodils do not require heavy fertilization. When preparing the soil for daffodils,
incorporate a complete garden fertilizer with a 1:4:4 or 1:3:3 N-P-K ratio,
(e.g., 6-24-24) at a rate of 2 to 3 pounds per 100 square feet of area. Be sure
to mix the fertilizer thoroughly with the soil; never place it directly in the
bottom of the hole where the daffodil bulb will be placed. Established bulbs
should be fertilized lightly each spring just as their leaves emerge from the
soil. A handful of garden or bulb fertilizer around the base of each clump is
sufficient; keep the fertilizer away from the leaves.
Although most gardeners find daffodils to be relatively trouble-free, the bulb
foliage should be allowed to dry and wither, about 8 weeks after bloom, before
removing the leaves. This foliage makes the food reserves that will be transferred
to the bulb for storage, ensuring a great display next year. Interplant cool-season
annuals or other perennials among the daffodils to provide some camouflage for
the aging daffodil leaves. Flower heads should be removed promptly following
flowering to prevent seed heads from forming.
Properly spaced bulbs will need dividing only every five to ten years. The need
for division becomes obvious when flower size becomes smaller. Many bulbs eventually
become overcrowded and must be divided and replanted for best effect. Wait until
the foliage has turned yellow and withered. Divide into smaller clumps and replant.
Storing bulbs in the average home environment is not very practical. If the
bulbs cannot be replanted immediately, store them dry and cool, between 60 and
65 F, until they can be planted.
According to the Netherlands Bulb Institute, the top 10 selling varieties of
daffodils are:
(Variety/Color/Type)
1. Narcissus 'King Alfred,' yellow w/ yellow cup, trumpet
2. Narcissus 'Salome,' white-pink w/ yellow cup, large-cupped
3. Narcissus 'Ice Follies,' white w/ white cup, large-cupped
4. Narcissus 'Tête à Tête,' yellow w/ yellow cup, Cyclamineus
5. Narcissus 'Minnow,' yellow w/ yellow cup, Tazetta
6. Narcissus 'Fortissimo,' white w/ yellow cup, trumpet
7. Narcissus 'Tahiti,' yellow w/ red cup, double
8. Narcissus 'Las Vegas,' white w/ yellow cup, trumpet
9. Narcissus 'Barret Browning,' white w/ oranges cup, small-cupped
10. Narcissus 'Mount Hood,' white w/ white cup, trumpet
The authors have received training through Colorado State University Cooperative Extension's Master Gardener program and is a Master Gardener volunteer for Larimer County.
Gardening and Insect Fact Sheets are available on-line by clicking HERE.
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