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Public Plant Profile

Sunny Boulevard® St. John's Wort

Hypericum kalmianum 'Deppe' (Sunny Boulevard®)

Category: Deciduous Shrub • St. John's Wort

Discover Sunny Boulevard® St. John's Wort, a vibrant, low-maintenance plant perfect for borders and pollinator gardens.

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Mature Height: 1-2 feet

Mature Width: 1-2 feet

Bloom Color: Yellow

Bloom Time: Summer

Light: Sun

Zone: Zones 4-8

Maintenance: Low

Growth Rate: Moderate

Season of Interest: Summer

Foliage: Deciduous

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Bold Outdoors Verified Insight

Designed & Reviewed by

Josh Graber

Owner and Landscape Designer · Kansas State University · 25+ Years Experience

B.S. in Horticulture and Landscape Design – Kansas State University

25+ years of industry experience

Description

Sunny Boulevard® St. John's Wort is a compact, hardy shrub known for its bright yellow flowers and attractive foliage. It is ideal for borders and mass plantings, providing vibrant color throughout the summer.

Ideal Conditions

Thrives in full sun to partial shade with moderate moisture. Prefers well-drained soil and can tolerate a range of soil types.

Soil Preferences

Well-drained soil is ideal; adaptable to various pH levels and moisture conditions.

Sun Needs

Sun

Watering Needs

Water regularly until established; then, it is drought-tolerant.

Pruning Notes

Light pruning after flowering can help maintain shape and encourage new growth.

Fertilizing Notes

Fertilize in spring with a balanced fertilizer to promote healthy growth.

Common Issues

Generally pest-resistant but can be susceptible to root rot in overly wet conditions.

Landscape Guidance

Landscape Use

bordermass plantingpollinator garden

Special Features

Attractive yellow flowersdrought-tolerantlow maintenance.

Wildlife Value

Attracts pollinators and provides habitat.

Resistance / Tolerance

Drought tolerant.

Notes from Our Designer

Great for adding color and attracting pollinators. Works well in naturalized areas.

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Design Ideas Using This Plant

Use this page to get a feel for where Sunny Boulevard® St. John's Wort may fit in the landscape, then explore similar plants below for more ideas on form, texture, and overall planting style.

What Clients Say

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Helpful Next Steps

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Frequently Asked Questions

Is Sunny Boulevard® St. John's Wort a good fit for Kansas City landscapes?

That depends on sun exposure, moisture, spacing, and how the plant will be used in the overall design. Bold Outdoors evaluates those practical conditions before recommending a plant broadly.

How should homeowners use this plant information?

Use the plant profile as a planning tool for size, conditions, and visual role, then connect it to the broader landscape design and installation plan for the property.

Next Step

Ready to plan your landscape?

Browse more plants or reach out and we will help you choose the right combination for your space.

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