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Plant varieties and zone information

From "Garden Sense"
episode DGAR-203

(Continued from page 4)

Clethra alnifolia 'Rosea' – Pink Summersweet

Deciduous, suckering shrub with pink flowers in summer
Plant in full sun to partial shade
Plant in wet to moist soil
Attracts butterflies
Fertilize in spring as new foliage appears
Height: to 8 feet; Width: 6-8 feet, spreading by suckers
Hardy in USDA zones (3)4-9:
- Zone 3: Plant in early spring; plant in full sun to light shade; mulch in spring to conserve moisture and again after first hard frost; avoid contact with salt; prune only if needed in early spring; may be marginally hardy in this zone.
- Zone 4: Plant in early spring; plant in full sun to light shade; mulch in spring to conserve moisture and again after first hard frost; avoid contact with salt; prune only if needed in early spring.
- Zone 5: Plant in early spring; plant in full sun to light shade; mulch in spring to conserve moisture and again after first hard frost; avoid contact with salt; prune only if needed in early spring.
- Zone 6: Plant in early spring or early fall; plant in full sun to partial shade; mulch in spring to conserve moisture and again after first hard frost; prune only if needed in early spring.
- Zone 7: Plant in early fall; plant in full sun to partial shade; mulch in spring to conserve moisture and again after first hard frost; prune only if needed in early spring.
- Zone 8: Plant in early fall; plant in full sun to partial shade; mulch in spring to conserve moisture and again after frost; prune only if needed in early spring.
- Zone 9: Plant in early fall; plant in full sun to partial shade; mulch in spring to conserve moisture and again in fall; prune only if needed in early spring.

Astilbe arendsii - Astilbe

Deciduous perennial with finely dissected foliage and showy plumes of various colored flowers in spring
Tolerates moist soil
Plant in partial shade for all zones
Height: 1-2 feet; Width: 2-3 feet
Water when dry during growing season; fertilize in spring
Hardy in USDA zones (3)4-8:
- Zone 3: Plant in spring to prevent winter heaving; mulch heavily after first frost; avoid contact with salt; divide clumps every few years in early spring; marginally hardy in this zone.
- Zone 4: Plant in spring to prevent winter heaving; mulch heavily after first frost; avoid contact with salt; divide clumps every few years in early spring.
- Zone 5: Plant in spring to prevent winter heaving; mulch heavily after first frost; avoid contact with salt; divide clumps every few years in early spring.
- Zone 6: Plant in spring; mulch after first frost; divide clumps every few years in early spring.
- Zone 7: Plant in spring or early fall; mulch after first frost; divide clumps every few years in early spring.
- Zone 8: Plant in spring or early fall; mulch after first frost; divide clumps every few years in early spring.

Gardening by Zip Code
If you're looking to start a gardening projectbut don't know your gardening zone—visit the National Gardening Associations's USDA Hardiness Zone Finder. Enter your Zip Code to identify the proper zone.

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