I have worked with A.D.R. Bulbs for almost 5 years now, and my company has sourced bulbs with them for longer than that. Communication is great - from ordering, to deliveries, to follow-ups on final product. I love the quality of the product as well as the service. We plant nearly 100,000 bulbs and A.D.R. keeps the whole process easy for us!
Louise Licata
, Bland Landscaping Co.
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Hyacinthus Orientalis 'Delft Blue'
Hyacinth
Splendid for naturalizing if planted in rich, well drained soil
Deer, rodent & rabbit resistant
Beloved by bees, butterflies & pollinators
- » Hyacinth bulbs feature giant flower spikes in an array of vibrant colors
- » The most fragrant of All wholesale Spring flowering bulbs
- » Blooms in Early - Mid Spring
Hyacinthus Calculator
When should I plant Hyacinthus Orientalis 'Delft Blue'?
Growing and Maintenance Tips for Hyacinthus Orientalis 'Delft Blue'
All wholesale Spring flowering bulbs must be planted in the Fall
Soil temperatures must be 55 F or below to ensure proper root development
The optimal planting time is when night-time temperatures are 40-50 F
The ideal soil pH level for bulbs is between 6 and 7
Most bulbs require a minimum cold frame of 6 weeks to root properly
Hyacinth bulbs contain a substance called oxalic acid, which can be irritating to bare skin – use gloves when handling these bulbs
Plant Characteristics
Additional Information
| Height | 10 Inches |
| Spread | 6-8 Inches |
| Spacing | 6-8 Inches |
| Hardiness Zone | 4-8 |
| Color |
Blue |
Storage Tips
Store bulbs in a cool, dry spot with good air circulation and low humidity
Most bulbs can tolerate temperatures between 38 and 70 F
Protect from heat, frost and strong sunlight
Pre-cooled bulbs for the South must be planted immediately
Avoid These Common Pitfalls
Not sure if a bulb is viable? Look for bulbs that are firm to the touch
Bulbs hate "wet feet" - never plant in areas with poor drainage or standing water
Planting when the soil temperature is too warm is the primary cause of stunted blooms
Road salt and de-icing compounds are harmful to bulbs - avoid areas where plowed snow accumulates
Crop rotation is key - don't plant the same type of bulb in the same spot year after year to protect against Rhizoctonia
Don't plant too shallow - it's essential that bulbs are planted at least 3 times their height into the soil
Plant bulbs firmly in the soil with their pointy end up and basal plate down - not all bulbs will right themselves underground
Avoid areas that do not receive at least half a day of sun
Plant away from invasive tree and perennial root systems that can strangle bulb roots & compete for limited water and nutrition
Wholesale Only Flower Bulbs Direct From Our Family Farms in Holland
A.D.R. Bulbs supplies wholesale hyacinth flower bulbs, specializing in bulk hyacinths for landscape professionals & retail packaged hyacinth bulbs for garden centers
Top size, elite quality, wholesale only flower bulbs since 1946