Dutch Crows, Species Crocuses
- CROCUS (Spring flowering)
- (Several species (chrysanthus, flavus, sieberi, tommasinianus,
vernus) and cultivars are available with blue, lavender, white, yellow
and bicolored flowers.)
- A. Flowering Characteristics
- Crocus flowers in early spring (February/March)
and plants are 4-6 inches tall.
- B. General Characteristics
- 1. Origin of species: Asia Minor and Europe
- 2. Common names: Dutch Crows, Species Crocuses
- 3. Geophyte organ: Tunicated Corm
- 4. Hardiness type: Hardy II -Injured at temperatures
below 14 degrees F (-10C) when planted.
- 5. Natural reproductive systems and growth and development
requirements: Reproduces by corm replacement and requires a warm (63 to
68F) - cool (28 to 32F) - warm (50 to 60F) annual reproductive cycle.
- 6. Primary uses: Rock gardens, beds, ground covers, lawns,
and woodland gardens.
- C. Cultural Information
- 1. Bulb sizes: Species are 5/up, C. vernus cultivars
are 8/up cm in circumference
- 2. Planting density: 0-4 inches apart, 35-70 per sq.
- 3. Planting depth: 5 inches to base of corm.
- 4. Planting time: Fall
- 5. Climatic zone habit: 1990 USDA Climatic Zones 3 to
4 with mulch, 5 to 7 without mulch.
- 6. Light requirements: Full sunlight to PM only or AM
- 7. Moisture: Tolerates drought, but keep moist during
- 8. Animal susceptibility: Susceptible.
- D. Companion Plants:
- Chaenomeles japonica, Forsythia, Jasminum nudiflorum,
Vinca minor, Hammamelis.
Holland Technical Service Bulletin Number 31 was prepared for the WWW
system by A.A. De Hertogh, L.B. Gallitano, M.E. Traer, and A.B. Russell,
Department of Horticultural Science, NC State University. The information
was obtained not only from original research conducted by the authors but
also from databases released by other sources. This Bulletin was published
by the International Flower Bulb Center (IBC), Hillegom, the Netherlands
on behalf of the Dutch Flower Bulb Industry. Because of the various climates
in North America and year-to-year variability of the weather, the IBC cannot
and does not accept responsibility for divergent results that may arise
using information obtained from this document or site. Photographs copyright
@1997 by A.B. Russell and A.A. De Hertogh. Computer programming by Miguel
Buendia, graphics by Brad Capel.