September 2025 Delivery
Cowanii Allium Bulbs
These small dainty pure white blooms have multiple flowers per stem. These are a smaller allium and ideal for adding extra colour into your borders yet also good for pots and cut flowers.
- Height (cm): 40cm
- Bulb Size (cm): 5+ cm
- Blooms: June
Planting Guide
| Species | Month | Depth | Spacing | Soil | Aspect |
|---|---|---|---|---|---|
| Allium | Sept-Nov | 3 x bulb height | 15-30cm | Well-drained |  |
| Anemone | Sept-Nov | 5cm | 5-10cm | Any |  |
| Bluebell | Aug-Dec | 5-10cm | 10cm | Moist |  |
| Camassia | Sept-Nov | 10cm | 15cm | Moist | |
| Chionodoxa | Sept-Nov | 5cm | 5cm | Well-drained | |
| Crocus | Sept-Nov | 5cm | 5cm | Well-drained | |
| Cyclamen | Aug-Oct | 5cm | 5cm | Well-drained | |
| Daffodil & Narcissi | Sept-Oct | 3 x bulb height | 10-20cm | Well-drained | |
| Erythronium | Sept-Nov | 10cm | 10cm | Moist | |
| Freesia | Aug-Oct | 5cm | 7cm | Well-drained | |
| Fritillary | Sept-Nov | 10-15cm | 20-25cm | Well-drained | |
| Hyacinth | Sept-Nov | 15cm | 10cm | Well-drained | |
| Ipheion | Sept-Nov | 5cm | 5cm | Well-drained | |
| Iris | Sept-Nov | 5cm | 5cm | Well-drained | |
| Muscari | Sept-Nov | 5cm | 5cm | Any | |
| Puschkinia | Sept-Nov | 5cm | 5cm | Well-drained | |
| Snowdrop | Sept-Dec | 10cm | 5cm | Moist | |
| Triteleia | Sept-Nov | 5cm | 5cm | Well-drained | |
| Tulip | Sept-Dec | 10-15cm | 10-15cm | Well-drained | |
| Wildflowers | Sept-Dec | 3 x bulb height | 10-15cm | Moist | |
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Full Sun
Partial Shade
Full Shade
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About Us
Boston Seeds is an independent seed merchant founded in 2002 by Andrew Wallis, after 25 years working for some of Europe’s leading seed houses. Find out more about Boston Seeds.
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