shrub

Kleim's Hardy Gardenia

Gardenia jasminoides 'Kleim'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Shrub

Height

30 inches

Width

30 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9

Water

Moderate

Humidity

High

Lifespan

Long-lived shrub

Native To

Asia (Cultivar)

Toxicity

Mildly toxic if ingested

The Story

Plant Bio

Gardenia jasminoides is a classic broadleaf evergreen shrub beloved for its intensely fragrant, waxy white flowers and glossy, dark green leaves. They are native to Asia and require acidic soil to thrive. 'Kleim's Hardy' is celebrated as one of the most cold-tolerant gardenias, reliably hardy in Zone 7. It is a compact, mounding shrub with charming, single, 6-petaled star-shaped flowers, making it ideal for containers and small gardens.

Bloom Period:

EarlyLate

Uses & Benefits:

The exquisite, star-shaped flowers of 'Kleim's Hardy' offer one of the most intoxicating fragrances in the plant world. Its compact size and glossy evergreen foliage make it a perfect jewel for containers, patios, and entryways where the scent can be enjoyed.

This variety's improved cold hardiness allows gardeners in cooler climates to successfully grow gardenias outdoors. Its small stature makes it an excellent choice for foundation plantings and small-space gardens.

The strong evening fragrance of gardenia flowers attracts nocturnal moths as pollinators, contributing to the biodiversity of the garden ecosystem.

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Where to Buy

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Planting

How to Grow

Choose a site with morning sun and afternoon shade.
Ensure soil is acidic, well-drained, and rich in organic matter.
Dig a hole twice as wide as the root ball.
Set the plant so the top of the root ball is slightly above soil level.
Backfill with amended soil and water thoroughly.
Apply a layer of acidic mulch like pine straw or bark.

Pro Tip

Feed with an acid-forming fertilizer containing iron to prevent yellowing leaves (chlorosis) and promote deep green foliage.

Keep It Thriving

Care Guide

Do

Provide consistent moisture, never allowing the soil to dry out completely.
Maintain an acidic soil pH (5.0 to 6.0).
Fertilize regularly during the growing season.
Mulch to conserve moisture and keep roots cool.

Don't

Do not plant in alkaline soil; leaves will turn yellow.
Avoid planting in locations with poor drainage.
Don't prune late in the season, as this removes next year's flower buds.
Avoid splashing water on the foliage to help prevent leaf spot.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Pest Check
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Intensely fragrant container plantClassic foundation shrubLustrous border accent

Companion Plants

Rhododendron sp. Camellia sasanqua Hydrangea macrophylla Hosta 'Guacamole' Liriope muscari

Multiply

Propagation Methods

Good to Know

Common Questions

Kleim's Hardy Gardenia questions

What zones can Kleim's Hardy Gardenia grow in?

Kleim's Hardy Gardenia is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Kleim's Hardy Gardenia deer resistant?

Yes — Kleim's Hardy Gardenia is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Kleim's Hardy Gardenia bloom?

Kleim's Hardy Gardenia typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Kleim's Hardy Gardenia need full sun?

Kleim's Hardy Gardenia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.