How do you plant bulbs in Colorado
David Jones
Published Apr 17, 2026
In general, plant bulbs 3-4 times as deep as the height of the bulb with the tip facing up and the root zone facing down. Imagine 3-4 bulbs stacked on top of each other. Some bulbs are exceptions to this rule, so refer to the instructions for each bulb. If your soil has more clay, plant them a little shallower.
When should you plant bulbs in Colorado?
Fall bulb planting is an easy way to jump-start the spring gardening season. At most elevations, the best time to plant bulbs is mid-September to late October, so bulbs can establish roots before the soil freezes.
What bulbs can I plant now in Colorado?
Different types of bulbs include dahlias, calla lilies, gladiolus, and elephant ears. Annuals – Plant annuals after the last spring frost as well. Full sun annuals include yarrow, torch flower, mexican poppy, verbena, snapdrago, fountain grass, Dahlberg daisy, and the black-eyed Susan.
Is it too late to plant bulbs in Colorado?
After the first frost or snow storm, you might assume that your bulb-planting days are over. But as long as the ground is workable, you can plant bulbs! This means that you can plant bulbs as late as January – if you can dig a hole deep enough to plant. Plant tulips and daffodils as late as the end of January!How do you plant spring bulbs?
Plant perennials first and then plant the bulbs 6 to 12 inches from them. Include perennials that don’t need frequent division so you won’t disturb the bulbs. Choose perennials with dense foliage to disguise the yellowing bulb leaves. Extend your enjoyment by choosing plants that bloom later than the bulbs.
What happens if I plant bulbs in the spring?
the spring will still bloom, although the blooming time may be later. Can you plant daffodil bulbs in the spring? the following year. Only when stored in a cool place like a refrigerator will make them bloom when planted in late winter or early spring.
When can I plant spring bulbs in Colorado?
For planting spring blooming bulbs in the Denver area, the best time to plant is October when the average soil temperature is about 55˚F. If you plant too early, the warmer soil temperatures may burn the flower already developing inside the bulb and it won’t bloom.
How long do bulbs take to grow?
The time for bloom after chilling varies by species. Tulips need 10 to 16 weeks of chilling and will sprout one to three weeks after the required period. Crocus, grape hyacinth, and daffodils have similar spouting times, but crocus and grape hyacinth need 8 to 15 weeks of chilling and daffodils 12 to 15 weeks.When should I plant bulbs?
When to plant bulbs depends on when they bloom. Spring-blooming bulbs, such as tulips and daffodils, should be planted in September or October when the soil temperatures have cooled. Summer-blooming beauties such as dahlia and gladiolus are best planted in the spring after all danger of frost has passed.
Is it too late to plant tulip bulbs in Colorado?Across Colorado, plant tulip bulbs in September or October, at least six weeks before the ground freezes and when the ground temperature has cooled to 55 degrees Fahrenheit. … Planting too late will not allow the bulb to root before the ground freezes.
Article first time published onWhat flowers can I plant in April in Colorado?
Plant bluegrass, rye and fescue as soon as nighttime temperatures are consistently above freezing. Begin planting perennial flower seeds like columbines, delphiniums, hollyhocks and daisies in the garden. April showers will help speed germination.
Do snowdrops grow in Colorado?
Snowdrops are already blooming in western Colorado. … Known by the common name of snowdrop, these flowers can bloom in winter when the weather is warm. Each plant produces one small (one inch or less) white flower, which hangs down from its stalk like a drop of water just before it opens.
Should I soak bulbs before planting?
Soak the bulbs in water for a few hours and plant with the “eyes” facing up. This bulb, which prefers partial shade, may not bloom the first year.
What bulbs should I plant in April?
- Tulips. The variation of tulips (Tulipa) is such that there are varieties to suit the punchiest planting schemes out there, as well as the most elegant. …
- Wood anemones. …
- Lily of the valley. …
- Snake’s head fritillaries.
How many bulbs can you plant together?
Three to six bulbs are suggested as a minimum number of summer bulbs of the same variety to plant in a grouping. Planting in Small Spaces – Plant bulbs of one colour in small spaces in the landscape. One colour will have greater impact and make the planting space look larger.
What bulbs do you plant in the spring?
- Anemone.
- Begonias.
- Caladium.
- Calla Lilies.
- Canna Lilies.
- Crocosmia.
- Dahlias.
- Elephant Ears.
Do tulips grow in Colorado Springs?
We know that planting hardy bulbs now will bring us flowers in spring — tulips, daffodils, crocus, squills, hyacinths, fritillaria and alliums, to name a few. Bulbs should be in the ground four to six weeks before the ground freezes. In Colorado Springs, that means plant them from mid-September through mid-October.
How do you grow tulips in Colorado?
- Choose the best bulbs. …
- Opt for mid- or late-season tulips. …
- Amend soil. …
- Research before you bone meal. …
- Do not overwater bulbs. …
- Let weather do its thing. …
- Deadhead flowers, but let leaves fade. …
- Squirrels like bulbs, too.
How far apart do you plant tulip bulbs?
Plant Like a Pro Garden designers know that tulips look best when they are planted in groups of 50 or more bulbs. Plan on 9 to 12 bulbs per square foot. For a full look, put 2″ to 3″ of space between the bulbs. Using a 4″ spacing will stretch the bulbs, but not look quite as full.
Is it too late to plant summer bulbs?
Summer bulbs, such as alliums, agapanthus and cannas, should be planted in spring, when the soil is beginning to warm up. … Bulbs you have stored over winter should be planted at the end of their dormant season.
What bulbs should I plant now?
- Snowdrops.
- Winter aconites.
- Reticulate iris (Iris reticulata)
- Crocus.
- Daffodils.
- Hyacinth.
- Grape hyacinth (Muscari)
- Tulips.
What bulbs are perennials?
- Tulips.
- Daffodils (Narcissus)
- Alliums.
- Crocus.
- Hyacinths.
- Anemones.
- Bearded Iris (Germanica)
- Specialty.
Do bulbs need watering?
Once bulbs start growing in the spring, water once a week (if you haven’t had any measurable rain) — this is especially important while they’re flowering. Water once a week until foliage dies back. Do not water spring blooming bulbs in the summer when they are dormant.
How deep do I plant bulbs?
Different types of flowering bulbs need to be planted at different depths, but a good general rule of thumb is to plant the bulb at three times the height of the bulb. So, for example, if your bulb is 2 inches tall, you’d plant it 6 inches deep.
How many years do bulbs bloom?
Most modern tulip cultivars bloom well for three to five years. Tulip bulbs decline in vigor rather quickly. Weak bulbs produce large, floppy leaves, but no flowers.
Do bulbs bloom first year?
Given the right growing conditions, many hardy bulbs such as daffodils, scilla and alliums, will multiply and bloom year after year. Other bulbs, such as tulips, put on their best show the first season and then gradually decline.
Can you plant bulbs all year round?
All season bulb gardens are a great way to add easy color to beds. Plant the bulbs at the right time and in the right ratios and you can have flowers blooming spring, summer, fall, and even winter if you live in a mild climate.
How do you take care of a bulb?
Caring for bulbs is much the same as other garden plants. Mulch to control weed growth, deadhead spent blooms and make sure they have adequate water during the growth and bloom season. After the blooms fade, make sure to maintain this care cycle, since the bulbs are now storing nutrients for the next growing cycle.
Can I plant bulbs in March?
When planting in March, it’s best to wait until you believe that the last frost is over. The vast majority of the bulbs that bloom in the late summer require sunshine, but make sure to check the instructions for the species that you purchased. Mix in compost and bulb food with the existing soil in your garden bed.
How long do bulbs last unplanted?
Most bulbs, if stored correctly, can be kept for about 12 months before needing to be planted. The longevity of flowering bulbs is largely determined by the adequacy of the storage provided.
How do you store bulbs before planting?
One of the basic rules of bulbs storage is to keep them dry and cool, which helps prevent bulbs from sprouting before you plant. How cold? Make sure your bulbs don’t freeze – This means if you’re still having freezing nights in your area, you won’t want to store them in an unheated garage or shed.