Plant Name: Spirea – Thor (Birchleaf Spirea)
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Technical name: Spiraea Betulifolia ‘Tor’
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Plant Family / Type: Rosaceae (Roses) / Deciduous Shrub
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Preferred location: Full Sun
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Mature height: 2’ – 3’
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Mature Width: 2’ – 3’
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Growth Rate / Habit: Slow / Dense compact rounded-mound
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Flower / Foliage:
· Dainty Clusters of White flowers – late-May to June
· Deadhead to encourage new blooms
· Leaves bright Green in Spring, Blue-Green in Sumner, Red, Yellow and Copper in Fall before dropping
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Preferred soil:
· Grow in most types of soils
· Average to moist conditions but don’t allow it to dry out
· Ideal in Rock garden
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Pruning and Maintenance:
· Time – late Winter or early Spring
· Light Prune will encourage repeat bloom (bloom on new wood)
· Remove twiggy growth on old plants every few years to encourage fresh new growth in order to encourage more blooms
· Key - Keep the shrub wider at the bottom than the top to allow sunlight to reach the leaves and prevent defoliation
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Shaping:
· For a formal appearance, shear annually after flowering
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Fertilize
· Feed with a general purpose fertilizer before new growth begins in Spring
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Spirea - Thor
