PlantFiles: Dutch Hyacinth Hyacinthus orientalis 'Delft Blue'
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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F)
Sun Exposure: Full Sun
Danger: All parts of plant are poisonous if ingested Handling plant may cause skin irritation or allergic reaction
Bloom Color: Medium Blue
Bloom Time: Mid Spring
Foliage: Herbaceous Blue-Green Smooth-Textured
Other details: Flowers are fragrant This plant is suitable for growing indoors Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
Patent Information: Non-patented
Propagation Methods: By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting: N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
On Apr 22, 2007, WaterCan2 from Eastern Long Island, NY (Zone 7a) wrote:
I inherited two of these from the previous owners of my house, They suffered neglect & bad placement but survived. I transplanted them immediately and they have taken some harsh winters and still come up better every time. These are real troopers and a definite indicator of spring in my region (NE). Did I mention they were amazingly fragrant also!
On Apr 1, 2007, Wvdaisy from Buffalo, WV (Zone 7a) wrote:
Fabulous color and scent! These were the second Hyacinth cultivar to bloom for me after H. Snow Crystal. They started blooming the second or third week in March here in zone 7a. They are in a very wet spot but looks like all bulbs bloomed no problem.
On Apr 22, 2005, StvNicksFan from Sisters, OR (Zone 4b) wrote:
VERY fragrant! I didn't have full blooms, but that can be based on a number of factors. Just a great blue color that intoxicates the senses!
This plant has been said to grow in the following regions:
Garberville, California Los Altos, California Loveland, Colorado Macy, Indiana Hastings, Minnesota Florence, Mississippi Piedmont, Missouri Coshocton, Ohio , Ontario Harbeck-fruitdale, Oregon Aberdeen, South Dakota West Valley City, Utah Leesburg, Virginia Buffalo, West Virginia Liberty, West Virginia