Crocus FF Cartwrightianus

Common name Cartwright's Crocus
Latin name Crocus cartwrightianus
Quantity per bag 5 bulbs
Cartwright's Crocus (Crocus cartwrightianus) produces delicate lilac flowers with subtle purple veining in autumn. This elegant species brings colour and biodiversity to the garden as the growing season comes to an end.

It provides rare autumn colour that extends the beauty of the garden until the end of the season. Its blooms attract late-season pollinators and naturalize beautifully.

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Product information
Bulb
identification
Common nameCartwright's Crocus
Latin nameCrocus cartwrightianus
FamilyIridaceae
CyclePerennial
Bulb typeBulb
Quantity per pack5 bulbs
Product
description

Cartwright's Crocus (Crocus cartwrightianus) produces an elegant and unexpected autumn display with delicate lilac to pale violet flowers, often highlighted by fine purple veining. Their deep red stamens stand out prominently at the centre of each bloom, creating a striking contrast that enhances their beauty. The flowers appear from September through October, before or at the same time as the narrow, dark green foliage. Growing only 8 to 10 cm (3 to 4 in) tall, this crocus gradually forms attractive naturalized colonies. Hardy to Zone 4, it returns reliably each year when planted in well-drained soil.

Plant the bulbs from August through September, before the first hard frosts, 8 to 10 cm (3 to 4 in) deep and 7 to 10 cm (3 to 4 in) apart. Choose a location in full sun or light partial shade with light, fertile, neutral to slightly alkaline soil that remains relatively dry during summer. Water lightly after planting to encourage rooting, then only during unusually dry periods while the plants are actively growing. A small amount of compost at planting is generally sufficient. After flowering, allow the foliage to yellow naturally so the bulbs can replenish their energy reserves for the following season.

Cartwright's Crocus is especially well suited to rock gardens, borders, gravel gardens, lightly mowed lawns, and alpine gardens. Planted in generous drifts, it creates a natural autumn carpet of flowers that extends the beauty of the garden after most perennials have finished blooming. It pairs beautifully with autumn crocuses, hardy cyclamens, sedums, and ornamental grasses. Its flowers also provide nectar and pollen for bees and other pollinators that remain active late in the season. Although closely related to the saffron crocus, this variety is grown strictly for its ornamental value and is not intended for consumption.

Main
benefit
Its delicate lilac autumn flowers bring colour to the garden after most perennials have finished blooming. It naturalizes easily and returns reliably year after year.
Garden
placement
Where to plant Ideal for rock gardens, borders, gravel gardens, and lightly mowed lawns. Its autumn blooms add colour when most perennials have finished flowering. Plant in generous drifts to create a spectacular natural display. It blends beautifully into naturalistic landscapes while supporting late-season pollinators.
Care level Easy
Planting
and care
ExposureFull sun to light partial shade. Bright conditions encourage abundant flowering, while dry summer soil improves bulb longevity.
Planting periodAugust to September
Planting depth8 to 10 cm (3 to 4 in)
Rooting temperature15 to 18°C (59 to 64°F)
Hardiness zoneZone 4
WateringWater lightly after planting, then only during unusually dry periods while the plants are actively growing. Well-drained soil is essential.
Soil typeLight, fertile, perfectly drained soil that remains relatively dry during summer. Avoid heavy, waterlogged soils.
Soil pHNeutral to slightly alkaline
FertilizationA light application of compost at planting is generally sufficient. Heavy fertilization is unnecessary.
Container
growing
Excellent for container growing in pots at least 20 to 25 cm (8 to 10 in) in diameter with excellent drainage. Use a light potting mix enriched with gravel or sand to prevent excessive moisture. Water moderately after planting, then very sparingly during summer dormancy. Place the container in full sun and protect it from excessive winter moisture.
Seasonal
care
Allow the foliage to yellow naturally before removing it so the bulbs can replenish their reserves. Avoid excessive winter moisture. Add a small amount of compost at planting if the soil is poor. Divide established colonies after several years if needed.
Bloom,
harvest
and garden
Bloom periodDelicate lilac to pale violet flowers with purple veining appear in autumn before or alongside the foliage, creating an elegant late-season display.
Flower colorLilac-purple
HarvestSeptember to October. Allow the flowers to fade naturally to encourage the bulbs to naturalize.
Companion plantsPairs beautifully with autumn crocuses, hardy cyclamens, sedums, and small ornamental grasses. These combinations extend the beauty of the autumn garden.
Plants to avoidWaterlogged soils encourage bulb rot. Rodents may occasionally move newly planted bulbs.
Wildlife appealBees and pollinators
Size
and growth
Height8 to 10 cm (3 to 4 in)
Spread7 to 10 cm (3 to 4 in)
Growth rateNaturalizes quickly
Rooting / establishment28 to 56 days
Frequently asked questions
The availability of our bulbs, cloves, tubers, rhizomes, seeds and plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may only be available for a limited time, depending on their natural cycle, planting period or available stock. These product pages are designed to guide and inspire your plant choices for the garden, vegetable garden, landscaping, container growing or sustainable outdoor projects.