= Water twice per month or less, once established.
= Water about once per week, once established.
= Water about twice per week, once established.
= Water three days per week, or more.
Use the plant water needs as a guideline. Actual plant water needs will vary for several reasons, including weather conditions, soil type, sun exposure, root depth, wind and elevation. Adjust your watering schedule as needed to meet the plants' needs at your site. Water recent transplants more often than established plants.
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Holodiscus dumosus
very low
creamy white with faint pink
early to mid-summer
4 to 6 ft.
4 to 6 ft.
Yes
Rocky Mountains
sun
USDA zones 4-8
hardy to 10,000 ft.
Rock spirea is a graceful native shrub that grows upright, slightly arching branches. The small, green, serrated leaves turn orange, gold, red, purple, or yellow in fall.
In early to mid-summer, rock spirea produces tiny white flowers in a large, airy panicles. The tan fruit persists through winter.
This plant grows natively in the foothills west of Colorado Springs and is a good candidate for very low water zones in our area.
Rock spirea is growing in three different locations at the Xeriscape Demonstration Garden. Those growing in full sun are performing the best. The flowers are prolific. Fall leaf color is also good. The fruit retains the form of the flowers, remaining throughout summer into late winter. The fruit and exfoliating bark add winter interest.
Minimal to no maintenance is required.
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