“Bulbs are bulbs”… until you plant the wrong ones at the wrong time and wonder why nothing happens.

The biggest difference between fall-planting bulbs and spring-planting bulbs is simple:

• Fall bulbs need a cold period to bloom properly (they’re built for winter).

• Spring bulbs are usually tender and can’t handle freezing ground (they’re built for warm soil).

Once you understand that, everything else, like timing, bloom season, and storage, makes sense.

The main difference (and why)

Fall-Planting Bulbs (Cold-Hardy Bulbs)

These bulbs are planted in fall because they need winter chill to trigger flowering. They establish roots in cool soil, rest over winter, then explode with blooms in early spring.

Think: Plant in fall → chill over winter → bloom in spring.

Spring-Planting Bulbs (Tender Bulbs + Corms + Tubers)

Most spring-planted “bulbs” are actually tubers, corms, rhizomes, or tender bulbs. They don’t want to freeze, so you plant them after the danger of frost has passed. Many of them bloom in summer and early fall.

Think: Plant after frost → grow in warmth → bloom in summer.

When they bloom

Fall bulbs bloom:

✅ Early spring to late spring
Examples: crocus and snowdrops first, then daffodils, hyacinth, tulips, alliums.

Spring bulbs bloom:

✅ Summer to early fall
Examples: dahlias, gladiolus, lilies, canna, ranunculus, begonias, elephant ears.

When to plant (Zones 4–6)

Fall-Planting Bulbs: When to plant

Best timing: September to November (before the ground freezes)

• Aim for planting when soil is cool (roughly 5–10°C), but still workable.

• You want time for roots to establish before deep freeze.

Spring-Planting Bulbs: When to plant

Best timing: after your last frost, when soil is warming

• Zone 4: typically late May to early June

• Zone 5: typically mid to late May

• Zone 6: typically early to mid May
  (Weather changes year to year. Warm soil matters more than the calendar.)

Rule of thumb: if nights are still dipping close to freezing, wait.

How to store bulbs (and why it matters)

Storage depends on whether the bulb is hardy or tender.

Fall bulbs (hardy): store short-term before planting

Fall bulbs are usually purchased in late summer/fall and planted fairly soon after.

Store before planting:

• Cool, dry, dark place

• Good airflow (don’t seal in plastic)

• Keep away from heat sources

• Ideally around 10–15°C for short-term holding

Tip: If you need a simple storage helper, you can nest bulbs in a breathable box with a dry material like vermiculite to reduce moisture and prevent rot.

Spring bulbs (tender): many can’t overwinter in the ground

A lot of spring-planted bulbs (like dahlias, cannas, gladiolus, elephant ears) need to be lifted in fall and stored for winter.

General winter storage method:

1. Lift after frost blackens foliage (or before hard freeze)

2. Let them dry/cure for a few days

3. Store in a breathable container (box/crate) packed in:

   • vermiculite, peat moss, or wood shavings (dry, not damp)

4. Keep them:

   • cool, dark, dry

   • typically 4–10°C

   • protected from freezing and from warmth that triggers sprouting

Why vermiculite helps: it cushions bulbs/tubers, reduces rot risk, and keeps moisture more stable.

Avoid: damp basements, sealed plastic bags, or anywhere that freezes solid.

What counts as “spring bulbs”
(plant in spring)

These are generally summer bloomers and/or tender bulbs/corms/tubers:

Spring-planting list:

• Begonias

• Anemone

• Calla Lily

• Ranunculus

• Gladiolus

• Dahlia

• Lilies (including unique picks like Starfish Lily)

• Canna Lily

• Elephant Ears

• Pineapple Lily

• Four O’Clock Flower

• Caladium

• Guernsey Lily

• Star of Bethlehem

• Oxalis

• Polianthes (Tuberose)

• Butterfly Weed

• Jack in the Pulpit

• Blazing Star (Liatris)

• Crocosmia

• Iris

• Peony

• Garlic

Note: A few of these are hardy perennials in many gardens (like peony, liatris, butterfly weed, some iris). They’re often sold seasonally and still follow the same “don’t freeze the planting stock in the bag” logic, plant when conditions are right.

What counts as “fall bulbs”
(plant in fall)

These are your classic spring bloomers that need winter chill:

Fall-planting list:

• Tulips

• Daffodils

• Cupped Daffodils

• Crocus

• Muscari

• Hyacinth

• Iris

• Galanthus (Snowdrops)

• Anemone

• Scilla

• Fritillaria

• Ranunculus

• Allium

Note: Anemone and Ranunculus can be sold for fall or spring planting depending on type and local timing. In Zones 4–6, many gardeners have better success planting them when soil and winter conditions match the variety. When in doubt, follow the package directions for your specific bulb.

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Add-ons to consider
(for better success + fewer pests)

Bulbs are basically plant candy for some critters. A few smart add-ons help a lot.

For root support and flowering

• Bone meal (classic bulb booster)
  Helps support strong root development and blooming.

For pest discouragement (and a little nutrition)

• Blood meal or chicken fertilizer/manure-based fertilizer
  Some gardeners use these as a deterrent for digging pests (squirrels, etc.) and as a nitrogen source.

Important: Don’t overdo it, too much nitrogen can push leafy growth over flowers in some plants. Always follow label rates.

Other helpful add-ons

• Compost or quality soil booster (especially in poor soil)

• Mulch after planting (helps regulate temperature and moisture, especially for fall bulbs)

Quick cheat sheet

• Want early spring blooms? → buy fall bulbs and plant in fall.

• Want summer colour? → buy spring bulbs and plant after last frost.

• Tender bulbs often need lifting and storing for winter.

• Use vermiculite for clean, dry storage and rot prevention.

• Add bone meal for blooms + consider pest-deterring amendments if critters dig.

Need help choosing the right bulbs for your yard?

Tell us your zone (4, 5, or 6), your sun exposure, and whether you want spring colour or summer colour, and we’ll help you pick the best bulbs (plus the right add-ons) for success.