bulb corm tuber

Ruby Giant Crocus

Crocus tommasinianus 'Ruby Giant'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

4 inches

Width

3 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average garden humidity

Lifespan

Perennial

Native To

Southeastern Europe

Toxicity

Toxic to pets and humans if ingested

The Story

Plant Bio

Crocus tommasinianus 'Ruby Giant' is a charming spring-flowering bulb known for its rich purple flowers that bloom early in the season. This cultivar is particularly noted for its large blooms and its ability to naturalize in gardens, creating beautiful displays year after year.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides early spring color with vibrant purple blooms, ideal for naturalized areas and borders.

Low-maintenance bulb that naturalizes easily and spreads over time.

Supports early pollinators like bees emerging in spring.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

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Planting

How to Grow

Tuck corms 3 inches deep in well-drained soil in early fall.
Water thoroughly after planting to settle soil around corms.
Mist cuttings or divide clumps in late summer for propagation.
Apply mulch to protect corms during winter in colder zones.
Fertilize with a balanced bulb fertilizer in early spring for vigorous blooms.
Remove spent flowers to encourage new growth and prevent seed formation.

Pro Tip

Plant in well-drained soil with full sun for best flowering performance.

Keep It Thriving

Care Guide

Do

Water during dry spells to keep soil slightly moist 🌱
Apply a layer of mulch in winter to insulate corms ❄️
Fertilize annually in early spring for vibrant blooms
Deadhead spent flowers to promote new growth
Divide clumps every 3-4 years to prevent overcrowding

Don't

Avoid overwatering to prevent bulb rot ❌
Do not plant in heavy, poorly drained clay soil
Refrain from pruning foliage until fully yellowed
Do not disturb corms during flowering season
Avoid planting in shady areas where blooms may be sparse

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Violet-scented border in early springRock garden accent with lush foliageNaturalized meadow planting

Companion Plants

Snowdrops Crocuses Daffodils Scilla Primroses

Multiply

Propagation Methods

Good to Know

Common Questions

Ruby Giant Crocus questions

What zones can Ruby Giant Crocus grow in?

Ruby Giant Crocus is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Ruby Giant Crocus deer resistant?

Yes — Ruby Giant Crocus is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Ruby Giant Crocus bloom?

Ruby Giant Crocus typically blooms in early spring through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Ruby Giant Crocus need full sun?

Ruby Giant Crocus does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Ruby Giant Crocus drought tolerant?

Yes — once established (usually after the first full season), Ruby Giant Crocus handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.