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Everything You Need To Know About Forcing Bulbs

Everything You Need To Know About Forcing Bulbs - Nature Hills Nursery

Charlotte Weidner |

Need to brighten your dreary winter or inject some fragrance and color into your home? Force a few spring bulbs!

If you are looking to have forced bulbs blooming this winter, your options go way beyond the usual Amaryllis or Paperwhite Narcissus! Sure these are among the easiest as they don’t need chill hours, meaning they can be potted and started to grow right away. Fall-planted, spring-blooming bulbs are easy to grow and a joy to watch as they quickly grow and flower!

But remember - there are so many other options!

Forcing Spring Bulbs

Pink hyacinth

If you want an inexpensive gift, or a fun project for the kids while everyone is cooped up this winter, add some cheer during these dreary short days of winter by forcing spring bulbs!

There are a wide variety of Daffodils, Tulips, Hyacinths, Muscari, Squills, and Crocus, in addition to Paperwhites that are available every fall!

Start with fresh, large, and firm Nature Hills bulbs for the very best results!

Forcing Bulbs 101 - What Does Forcing Bulbs Mean

By potting up some fall-planted, spring-flowering bulbs now, you are essentially tricking them into blooming earlier than they would if they are grown outside.

The Keys to Success:

  • A good, loose, enriched potting mix (not soil from the garden)
  • Decorative pot, wide-mouth vase, or clay pot already laying around the potting shed or garage
  • A bright, sunny, yet indirect light location
  • Attention to moisture, mulch or moss to hold in moisture and a dash of patience
Bulbs in a pot

Directions

  1. Ensure you have proper drainage in your container or a means to wick away excess moisture
  2. Fill the container with soil about halfway or more for smaller bulbs
  3. Moisten to the touch
  4. Place the bulbs onto the soil with the pointed side up
  5. The bulb's tips should be just beneath the edge of the pot
  6. Plant many bulbs in a pot close together and even touching for the greatest impact
  7. Cover with more moistened soil, tamping down gently
bulbs flowering in the spring

Set up multiple pots in cold storage and bring them out a week or two apart for an extended bloom time in your home! Try mixing and matching different spring bulbs - a ring of Crocus around a central column of Tulips. Or a wide, shallow dish of dainty Squills and Muscari surrounded by polished pebbles. Mix Paperwhites, Hyacinths, and Tulips for a lovely fragrance in a decorative glazed pot. There’s always something special about Snowdrops coming up from a bed of moss in a teapot! Some miniature Dwarf Iris in cute decorative buckets or watering cans will look adorable!

Try mixing your bulbs among African Violets, and other flowering houseplants! Use a terrarium for a lovely display that can be kept out of reach of curious little fingers or naughty pets! There are even hydroponic vases specially designed for larger Hyacinth, Tulip, and Amaryllis bulbs.

Approximate bloom time

How to Prepare Bulbs for Forcing

watering bulbs

If you do not have pre-chilled bulbs, some like to place these potted bulbs in the refrigerator (kept away from fruits or vegetables) or outside if the temperatures are consistently cold enough. These potted bulbs will need a chill period where they remain in a cool spot of about 40°F or less, for about 12- 16 weeks. They can be kept in the dark and add any additional moisture as needed. Since these do not have leaves yet, watch it with watering and only keep the soil barely moist to the touch.

Moisture

Water the soil well and drain off any excess water. Keeping the bulbs wet will cause them to rot, but the soil needs to be moist. The moist soil will encourage roots to develop soon after they are potted up. Once they grow, continue monitoring the moisture on a daily basis.

Sunlight

As soon as you see the plants begin to grow, they can be brought out of cold storage and placed in a sunny window where they will develop new leaves! In only 3-4 weeks you will enjoy blooms right inside your home!

What To Do With Bulbs After Forcing

Muscari in a pot

There is little need to fertilize your bulbs, just keep those leaves in a sunny area. The bulb stores all the food the flowers will need. If you are planning on keeping your bulbs to plant outdoors once spring has arrived in your area, use all-purpose fertilizer, compost tea, or earthworm castings as soon as the flowers fade and are deadheaded.

Once your Christmas Amaryllis or spring ephemerals are done blooming, be sure to deadhead the flowers only and keep the leaves. This way the green leaves will continue. to grow and make food for the bulbs. Sometimes these blooms and leaves get a bit leggy when in less light than optimal, so if you are not able to move them to a brighter (still indirect) sun location, find a way to support the stems with stakes and soft twine or yarn to help hold them up.

Many folks use these forced bulbs as annual accents, however, you can also plant them outdoors. Once it is past the last hard-freeze date in your growing zone - plant your bulbs outdoors and watch them grow year after year! Keep them watered until they are established.

Make Spring Happen Early Indoors!

Your flowering forced spring bulbs can now be enjoyed, or gifted as soon as the buds begin to show! Include an instruction card with care and watering needs.

What could be nicer to have the work done for you? What could be a better treat for your own home?

Try making gorgeous spring arrangements with forced branches from your flowering trees like Forsythia, Cherry or Apple trees, and Quince! You’ll whisk away the dreary winter doldrums in a hurry!

Head over to NatureHills.com right now and start adding some indoor cheer today with gorgeous spring-flowering bulbs!

Happy Planting!

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Frequently Asked Questions

How do you force bulbs to bloom indoors during winter?

To force spring bulbs indoors, start by filling a container halfway with loose, enriched potting mix, then place bulbs pointed side up with their tips just below the rim of the pot, planting them close together or even touching for maximum impact. Most spring bulbs like tulips, hyacinths, crocus, and daffodils require a cold storage period before they will bloom, while amaryllis and paperwhite narcissus can be potted and started right away without any chilling. For an extended indoor bloom season, set up multiple pots in cold storage and bring them out a week or two apart. Start with the largest, firmest bulbs you can find, keep the soil lightly moist, and place your pots in a bright, indirect light location once they begin to sprout.

Which bulbs are the easiest to force indoors for beginners?

For beginners, Amaryllis and Paperwhite Narcissus are the easiest bulbs to force indoors because they require no chill hours and can be potted and started right away. Hyacinths are also a great choice for those willing to take a small extra step, as they need only a brief cold period before blooming. Start with large, fresh, firm bulbs for the best results, and plant them in a good loose potting mix with the pointed end up, just below the rim of the container.

How do you force daffodil bulbs to bloom early indoors?

To force daffodil bulbs to bloom early indoors, start with large, firm bulbs and plant them pointed-side up in a loose, enriched potting mix, placing them close together with their tips just below the rim of the container. Most daffodils require a cold chilling period of around 12 to 16 weeks at temperatures between 35 and 45 degrees Fahrenheit before they will bloom, so store your pots in a cool, dark location like a garage or refrigerator after planting. Once you see shoots emerging, bring the pot into a bright, indirectly lit room and keep the soil evenly moist. For a continuous display through winter, pot up several containers and bring them out of cold storage one to two weeks apart.

How long does it take to force bulbs indoors?

The time it takes to force bulbs indoors depends on the type of bulb and whether it requires a chilling period. Amaryllis and Paperwhite Narcissus are the fastest options, typically blooming within 4 to 6 weeks of potting since they require no chill hours. Spring bulbs like Tulips, Hyacinths, Daffodils, and Crocus need 12 to 16 weeks of cold storage at 35 to 48 degrees Fahrenheit before being brought into warmth, after which they will bloom in 2 to 4 weeks. To extend your indoor bloom season, pot up multiple containers and stagger bringing them out of cold storage one to two weeks apart.

Can you force bulbs in water without any soil?

Yes, certain bulbs like Paperwhites and Hyacinths are well suited to forcing in water using a vase or glass container filled with pebbles or glass marbles to anchor the roots. Simply nestle the bulb on top of the stones and add water just until it touches the base of the bulb, being careful not to submerge the bulb itself or it will rot. Refresh the water every few days to keep it clean and maintain that consistent water level. Choose a bright, indirect light location and expect blooms in roughly four to six weeks depending on the bulb variety.

Do forced bulbs need a cold period before you bring them inside?

Most spring-blooming bulbs like tulips, hyacinths, daffodils, crocus, and muscari do require a cold period of around 12 to 16 weeks at temperatures between 35 and 45 degrees Fahrenheit before they will bloom indoors. This chilling period mimics winter conditions and triggers the bulbs to flower once brought into a warm environment. Amaryllis and Paperwhite Narcissus are notable exceptions, as they require no chill hours and can be potted and started right away. To stagger your blooms throughout winter, pot up several containers and bring them out of cold storage one or two weeks apart.

Can you reuse forced bulbs after they finish blooming?

After forced bulbs finish blooming indoors, you can plant them outside in the garden once the ground thaws in spring, though most will not perform as reliably as fresh bulbs. The forcing process depletes much of the bulb's stored energy, so blooms the following year may be smaller or sparse, particularly with tulips. Daffodils and hyacinths tend to recover better than tulips when transplanted outdoors after forcing. Allow the foliage to die back naturally after planting to help the bulb recharge, and plan to supplement with fresh bulbs each fall for the best display.

How do you grow amaryllis indoors as a forced bulb?

Amaryllis is one of the easiest bulbs to force indoors because it requires no chill hours, meaning you can pot it up and begin growing it right away without any cold storage period. Plant the bulb in a snug container with well-draining potting mix, leaving the top third of the bulb exposed above the soil line. Place it in a bright, sunny location and water sparingly at first until you see active growth, then water more regularly. For a steady display of blooms through winter, pot up multiple bulbs a week or two apart to stagger their flowering times.

What containers and growing medium work best for forcing bulbs?

For forcing bulbs, choose a decorative pot, wide-mouth vase, or clay pot with proper drainage or a way to wick away excess moisture. Always use a good, loose, enriched potting mix rather than garden soil, which can compact and introduce disease. Fill your container about halfway with moistened potting mix before placing bulbs, then top off with more moistened soil, tamping gently. Pack bulbs close together and even touching for the greatest visual impact, with pointed tips just below the rim of the pot.

When should you start forcing bulbs to time blooms for the holidays or Valentine's Day?

For holiday blooms in late December, start chilling your spring bulbs like tulips, hyacinths, and crocus in early to mid-October, as most require 12 to 16 weeks of cold temperatures between 35 and 48 degrees Fahrenheit before they will bloom. Paperwhites and amaryllis are the exception, requiring no chill period at all, so you can pot those up just 4 to 6 weeks before you want them to flower. For Valentine's Day blooms, begin chilling your bulbs in late October or early November. Start with large, firm bulbs from a reliable source like Nature Hills, and stagger your planting dates every week or two to keep the color and fragrance rolling through the winter season.