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Gardeners Rejoice: New Techniques Boost Success with Challenging Bells of Ireland
for years, Bells of Ireland (Moluccella laevis) has been a favorite among flower enthusiasts for its unique, upright green spires, but its reputation for being challenging to germinate has frequently enough deterred gardeners. Now, after extensive trials, proven methods are emerging to significantly improve success rates with this charming annual.
While Bells of Ireland readily self-seeds in many gardens, particularly in USDA hardiness zones 2-11, starting them from seed intentionally requires a specific approach. The key lies in cold stratification. Gardeners can achieve this by either directly sowing seeds outdoors in early spring – ideally between March and April in temperate climates – or by placing seeds in a sealed container in the freezer for 4-6 weeks prior to sowing. This mimics the natural winter conditions the seeds require to break dormancy.
To further enhance germination, which typically occurs within 14-21 days, seeds should be soaked in lukewarm water for 24 hours before planting.Optimal germination temperatures range from 65-68°F (18-20°C). Maintaining consistent moisture during this period is crucial, but avoid overwatering, which can lead to rot.
A significant challenge with bells of Ireland is its development of a strong taproot. This makes transplanting delicate seedlings difficult. To mitigate this, sowing seeds individually into biodegradable modules – such as peat pots or coir pellets – is highly recommended.This minimizes root disturbance when planting out. Experts at the Royal Horticultural Society (RHS) in Wisley, Surrey, England, have also noted the benefit of using a seed starting mix with a lower nitrogen content to discourage leggy growth.
Once seedlings have developed several sets of true leaves, they can be transplanted into full sun locations, spaced approximately 12 inches (30 cm) apart. Water deeply after planting and maintain consistent moisture until established.For cut flower arrangements, harvest the stems when the small white flowers begin to emerge from the green bracts, cutting at the base of the stem. Allowing some flowers to mature and go to seed will encourage natural self-seeding for future displays.
Bells of Ireland seeds are readily available from reputable suppliers. Burpee Gardening offers a wide selection of seeds, as do Thompson & Morgan and Park seed.
