Planting Bulbs Denver CO

Bulbs grow best in a location with full sun. Choose planting beds where bulb foliage will receive at least 6 hours of sun during spring through summer. Most bulb species also prefer well-drained, not soggy, soil.

James Nursery CO
(303) 288-2424
Denver, CO
 
TruGreen
(888) 615-8157
8995 West 44th Avenue
Wheat Ridge, CO
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Get 10% off our Lawn Care Package that includes: A Healthy Lawn Analysis customizing a plan to your lawn’s needs, Proactive services provided at key stages throughout the year, Fertilization, Weed Control, & Lawn insect control. For new residential customers only. Not to be combined with or used in conjunction with any other offer or discount including prepayment discount. Additional restrictions may apply. Offer not valid with TruNatural program.
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Welby Gardens
(303) 288-3398
Denver, CO
 
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(303) 422-5650
9975 Wadsworth Parkyway Ste F
Westminster, CO

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(303) 604-2988
1240 La Farge Avenue
Louisville, CO

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(303) 761-6131
Englewood, CO
 
Center Greenhouse
(303) 288-1209
Denver, CO
 
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(303) 252-1900
Westminster, CO
 
Little Valley Wholesale Nursery
(303) 659-6708
Brighton, CO
 
TruGreen
(888) 615-8157
12445 Dumont Way
Littleton, CO
Description
Get 10% off our Lawn Care Package that includes: A Healthy Lawn Analysis customizing a plan to your lawn’s needs, Proactive services provided at key stages throughout the year, Fertilization, Weed Control, & Lawn insect control. For new residential customers only. Not to be combined with or used in conjunction with any other offer or discount including prepayment discount. Additional restrictions may apply. Offer not valid with TruNatural program.
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Planting Bulbs

The best time to plant spring-flowering bulbs depends on where you live. Ideally, wait until the soil temperature is below 60�F. As a general guide, plant in September through early October if you live in USDA Hardiness Zones 4 or 5; October to early November in zones 6 or 7; and November to early December in zones 8 and 9. Plant bulbs that have been refrigerated for 8 to 10 weeks in late December to early January in zone 10.

Bulbs grow best in a location with full sun. Choose planting beds where bulb foliage will receive at least 6 hours of sun during spring through summer. Most bulb species also prefer well-drained, not soggy, soil.

Tools and Materials

Tools and Materials
  • High-quality bulbs
  • Trowel or bulb-planting tool
  • Shovel
  • Bulb fertilizer
  • Mulch
  • Water and nozzle

Dig Holes. Dig individual bulb holes or one wide hole to plant groups of bulbs. Digging up the whole bed makes bulb spacing, layering, and soil amending easier. The depth of the hole should equal three to four times the bulb height. For example, dig a 6- to 8-inch-deep hole for a 2-inch-high bulb.

Arrange bulbs. Set the bulbs in a planting bed or in separate planting holes with their roots or basal plate downward. Space bulbs according to supplier's recommendations. In general, smaller bulbs are planted closer together than larger bulbs. Fill the planting hole with soil and firm it gently.

Water and mulch. Water the bulbs right after planting to help initiate growth. In mild-winter areas, mulch right after planting to help keep soil cool and moist. Apply mulch after soil freezes in cold-winter areas to prevent the ground from heaving during winter thaws and pushing the bulbs too close to the surface.

Fertilize. Each autumn, maintain existing tulip and hyacinth plantings by sprinkling 1/2 cup of the 9-9-6 fertilizer per 10 square feet. Daffodils and snowdrops thrive on a 5-10-20 mixture. Three-fourths cup of 5-10-12 mix per 10 square feet works on any type of bulb. First-year bulbs don't need fertilizer.

Tips

Plant "mild-winter" tulip species that thrive in zones 8 through 10, such as the lady tulip (T. clusiana), the Candia tulip (T. saxatilis), and the Florentine tulip (T. sylvestris). These tulips do not need chilling before planting.

To discourage voles or gophers, add a handful of sharp gravel to the planting hole or plant bulbs in wire or fabric baskets. Don't mulch where rodents are a problem.

Layer two different species, such as tulips and grape hyacinths, in the same bed for exciting color combinations. Plant tulips first, then add enough soil to achieve the proper depth for the grape hyacinths. Plant the grape hyacinths between the tulips.

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