Ogon Spirea

About this plant

Spiraea thunbergii 'Ogon', commonly known as Ogon Spirea or Thunberg Spirea, is a show-stopping deciduous shrub celebrated for its vibrant, year-round appeal. In spring, its arching branches are adorned with a profusion of tiny, starry white flowers, creating a breathtaking bridal veil effect against its emerging chartreuse leaves. Throughout summer, the finely textured, slender foliage maintains a brilliant golden-yellow hue, providing a cheerful contrast and bright focal point in any garden setting. As autumn approaches, the leaves deepen to a warm orange, creating a stunning display before dropping for winter. Even in winter, the delicate, twiggy branches offer architectural interest. This versatile and low-maintenance shrub is perfect for mass plantings, borders, foundation plantings, or as an exquisite specimen. Its graceful form and luminous color make it an indispensable addition to both contemporary and traditional garden designs, ensuring a brilliant performance year after year.

Installation timing

When we're in season, outside of the winter months, our goal is to get your plants installed within about two weeks. That window gives us enough time to secure your plants from our supplier and find a spot on the schedule. Throughout the process we stay in touch through notifications and your existing client portal on the main A Cut Above website, which is separate from this landscaping plants shop.

Care & maintenance

Ogon Spirea thrives in well-drained soil and prefers full sun for the best foliage color. It is adaptable to a range of soil types, including clay, as long as drainage is adequate. Prune immediately after flowering to maintain shape and encourage new growth. Remove any dead or damaged branches as needed. Fertilize lightly in spring with a balanced slow-release fertilizer.

Watering suggestions

Proper watering is the single most important factor in your plant's survival after installation. Newly installed plants have a limited root system and rely on you for consistent moisture while they establish.

• First 2 weeks: Water deeply every day (or every other day in cooler, wet weather), soaking the root ball and surrounding soil.
• Weeks 3–12: Water deeply 2–3 times per week, adjusting for rain, heat, and soil drainage.
• After establishment: Water deeply about once a week during the growing season, and more often in extreme heat or drought.
• How to check: Stick a finger 2–3 inches into the soil near the roots — if it's dry, it's time to water. Deep, less-frequent watering encourages strong roots; shallow daily sprinkles do not.
• Avoid: Overwatering (soggy, waterlogged soil) is just as harmful as underwatering and can drown roots.

Watering needs vary by plant, season, soil, and exposure. Because proper watering is the customer's responsibility after installation, please make sure you understand and can follow these suggestions before ordering.

Good to know: plants and trees purchased from and installed by A Cut Above include a one-year limited warranty from the date of installation. Because plant survival depends heavily on proper watering and care after installation, losses caused by improper care, neglect, animal or chemical damage, or extreme weather are not covered, and we must be given the chance to inspect a struggling plant before it's removed or replaced. Coverage is one replacement per plant. Read our warranty info.