Northwest Regional Reports

Fall-Blooming Bulbs Extend the Northwest Gardening Season

These gems hit their stride while the rest of the garden winds down

Many gardeners think of bulbs only blooming in spring, but standout varieties like autumn crocus can make the end of the garden season more exciting. Photo: Danielle Sherry

In spring, I always look forward to bulbs bursting through the ground. Searching for precious blooms amid the wet leaves and branches provides a fun reason to wander the garden. Autumn is another time of year that bulbs can add excitement. Taking a walk about the garden as temperatures start to cool, I often find several treasures to lighten up the darkening days. The following are a few of my favorite fall-blooming bulbs to try in the Northwest. See more: Favorite Plants for Fall

colchicum autumalis
Traditional autumn crocus has lovely lavender blooms that brighten up the darkening days. Photo: Susan Calhoun 

Fall crocus

The colchicums are among the first to show up in September. Autumn crocus (Colchicum autumnale, Zones 4–8) has a delicate and somewhat fragile lavender flower. It pops up from the ground with no stems and no leaves, offering a surprising bright bloom in shady open ground. Autumn crocus is happy in sun to mostly shade and has low moisture needs. A grouping planted under a Japanese maple (Acer palmatum and cvs., Zones 5–9) is an ideal combo, with the lavender crocus blooms contrasting magically with the bright orange-yellow fall foliage of the maple.

autumn crocus ‘Waterlily’ is a hybrid
The hybrid ‘Waterlily’ is a sturdy and showy variety of autumn crocus. Photo: Susan Calhoun

Last year I added ‘Waterlily’ fall crocus (Colchicum ‘Waterlily’, Zones 4–7) to my beds. This variety is a little sturdier than C. autumnale probably because it has more petals. It prefers partial sun and a more exposed bed, which may help it stay more compact.

small white flowers with broader sage-colored leaves, cyclamen is a hardy autumn bulb
Hardy cyclamen blooms in an array of colors. Often from one package of small bulbs you will get plants that have white, purple, and pink flowers. Photo: Susan Calhoun

Hardy cyclamen

The variable hardy cyclamen (Cyclamen hederifolium, Zones 5–9) is a highlight in the snowdrop (Galanthus spp. and cvs., Zones 3–7)  bed. Cyclamen prefers sun to partial shade, is drought tolerant and summer dormant, and is beautiful in mass. Hardy cyclamen will spread where it is happy, and its serrated silver leaves are visible at the same time as the flowers. Some cyclamen show flowers first, with the leaves emerging only after the plants have finished blooming.

autumn daffodil's bright yellow blooms emerge from the ground in fall
A daffodil for fall? Surprisingly, yes! The bright yellow blooms of autumn daffodil are bright and undeniably cheerful. Photo: Susan Calhoun

Autumn daffodil

The final two bulbs are a bit more usual. Autumn daffodil (Sternbergia lutea, Zones 6–9) has bright yellow flowers and looks quite a bit like a yellow crocus. It blooms from September to October and persists into winter. It likes to be dry and warm during summer for the best flower show in fall. I expect autumn daffodil to be fabulous this year because it has been very warm and dry. I’ve planted it in an open border with partial sun close to the front of the bed. I like being able to see it close to the path.

Queen Olga's snowdrop has dainty white flowers that open like clam shells that droop off their skinny stems in a clump
Queen Olga’s snowdrop, sometimes called autumn snowdrop, is a sophisticated bulb that deserves a royal spot in a shady section of the garden. Photo: Susan Calhoun

Queen Olga’s snowdrop

I’m a big fan of snowdrops, so it was exciting to learn of a fall-blooming option. Queen Olga’s snowdrop (Galanthus reginae-olgae, Zones 6–9) forms a nice clump in partial shade. The white blooms are quite different than most fall colors and show well under ferns. A strong, musky fragrance adds to the allure. The foliage has a silver stripe in the middle of the leaf. It likes dry conditions in the summer and good moisture in the spring.

From a planting aspect, remember that these bulbs go dormant in summer, and you may see an open space that feels like it needs to be planted. I sometimes forget there is something occupying that spot. You can prevent these “blank” spots in the bed by adding annuals. By carefully planting around the bulbs with shallow-rooted annuals, the empty spot goes away. The annuals are then easily discarded in fall.

Most gardeners should be more aware of these season-extending plants. These bulbs are great multipliers and naturalize well in the garden. They provide food for foraging insects and help them prepare for winter. All are available by mail order or in local nurseries, so now is the time to add them to your plant collection.

 

—Susan Calhoun is the owner of Plantswoman Design in Bainbridge Island, Washington.

 

See more

More from Susan Calhoun

More Northwestern Regional Reports

Great Garden Combinations for Fall

Great Bulbs for Summer and Fall

View Comments

Comments

Log in or create an account to post a comment.

Related Articles

The Latest

Video

View All