Kleim’s Hardy Gardenia

Gardenia jasminoides 'Kleim's Hardy'

12 Reviews

Kleim’s Hardy Gardenia

Gardenia jasminoides 'Kleim's Hardy'

12 Reviews


How are the heights measured?

All tree, and nothin' but the tree! We measure from the top of the soil to the top of the tree; the height of the container or the root system is never included in our measurements.

What is a gallon container?

Nursery containers come in a variety of different sizes, and old-school nursery slang has stuck. While the industry-standard terminology is to call the sizes "Gallon Containers", that doesn't exactly translate to the traditional liquid "gallon" size we think of. You'll find we carry young 1-gallons, up to more mature 7-gallons ranging anywhere from 6 inches to 6ft.

How does the delivery process work?

All of our orders ship via FedEx Ground! Once your order is placed online, our magic elves get right to work picking, staging, boxing and shipping your trees. Orders typically ship out within 2 business days. You will receive email notifications along the way on the progress of your order, as well as tracking information to track your plants all the way to their new home!

Why are some states excluded from shipping?

The short & sweet answer is: "United States Department of Agriculture Restrictions." Every state has their own unique USDA restrictions on which plants they allow to come into their state. While we wish we could serve everyone, it's for the safety of native species and helps prevent the spread of invasive disease & pests. We've gotta protect good ole' Mother Nature, after all.

About Me


Kleim’s Hardy Gardenia is a beautiful evergreen shrub growing to 2 or 3 feet tall and as much across. Even without flowers it makes a lovely addition to the garden, with glossy, deep-green smooth leaves densely covering the plant. It is not for that, however, that it is grown, but for the beautiful, pure-white flowers that cover it from June to October. This have the rich, exotic scent that has made the gardenia a loved plant in America for 250 years. What makes this particular gardenia so special is its hardiness. It will survive even when the temperature falls to zero degrees – much more hardy than any other gardenia available. This means it can be grown in zone 7, a full zone colder than other gardenias. Grow it in your flower beds, turn it into a low hedge, or have it in pots to move around, so that you can always enjoy its rich perfume. No matter how you grow it, you will love this beautiful plant for its perfume and for its hardiness, allowing northern gardeners to enjoy a plant once only available to those in the south.

  • The hardiest true gardenia available
  • Rich perfume fills the air
  • Beautiful single white flowers
  • Rich-green glossy evergreen foliage
  • In bloom from June to October

Plant Kleim’s Hardy Gardenia where it will be partially shaded, or have sun in the morning and shade in the afternoon. It will grow best in acidic soil, but if you don’t have that, simply grow it in a container and move it wherever you want to have that rich perfume around you. You can also use a product called chelated iron to grow it in any outdoor soil. Keep your plants well-watered, but beyond that, and some fertilizer, gardenias are much easier to grow than often believed. It is normally free of pests and diseases and deer will normally leave it alone, so this is really not a difficult plant to grow successfully.

Plant Hardiness Zones 7-10
Mature Width 2-3
Mature Height 2-3
Sun Needs Full Sun, Partial Sun
Zones 7-10

Gardenias are wonderful and exotic plants grown for their rich fragrance and glossy, evergreen foliage. Kleim’s Hardy Gardenia is the hardiest of them all, growing well even in the relatively cold areas of zone 7, with temperatures all the way down to 0o Fahrenheit. It has pure-white flowers 2 inches across, with thick petals and yellow stamens showing in the center. It has the same rich fragrance that makes gardenias so popular wherever they can be grown.

It grows into a small shrub 2 to 3 feet tall, and rounded, growing 2 to 3 feet across. This makes it ideal for a smaller garden, or for growing in pots, when it can be moved around the garden to enjoy its perfume everywhere. You can even make a low hedge with this plant. To keep it flowering, only prune in early spring, just when the weather begins to warm. Flowers are produced continuously from June to October, so throughout the ‘outdoor’ months you will have this beautiful plant in flower. Even when not flowering, Kleim’s Hardy Gardenia is beautiful, with its glossy, rich-green evergreen foliage giving structure and permanence to your shrub arrangements.

Growing Kleim’s Hardy Gardenias

Although sometimes thought difficult, gardenias are actually easy to grow if you create the right conditions and follow a few simple rules. Choose a sheltered spot, away from wind, in a partially shaded location. The ideal spot has morning sun and afternoon shade, especially during the hottest months, so choose the location with care. Gardenias like an acid soil (pH below 6.0), so test you soil and add plenty of lime-free organic material when preparing the planting spot. Well-rotted pine-bark is ideal, but other composts are also suitable. Even if you find your soil is not acidic enough, you can still grow Kleim’s Hardy Gardenia by using a special fertilizer called chelated iron, which you water onto your plant and soil in spring and again in late summer. This will keep the leaves a rich, dark green, and your plant strong, healthy and flowering well.

Alternatively, plant your gardenia in a container, using potting soil for acid-loving plants. Gardenias make great pot plants, and a plant in a container is also easy to move around to get the correct amount of sun exposure. In a pot, it can also be brought inside when the temperatures are too low, even if you only have an unheated porch for shelter.

Care and Maintenance

Mulch Kleim’s Hardy Gardenia in spring with pine bark, compost or peat-moss and keep it well-watered. Gardenias like plenty of water, so never let the soil become dry around your plant. Water whenever the soil begins to dry on the surface, but don’t water your plant so much that it is constantly in wet soil. Use a fertilizer for acid-loving plants, applied in early spring and again 6 weeks later, or use a liquid gardenia fertilizer according to the directions. Do not fertilize in late summer or fall, as new growth will be more susceptible to frost.

Once that delicious perfume wafts across your garden from your gardenia bush, this little bit of work will seem like nothing. Kleim’s Hardy Gardenia is a wonderful plant and we regularly receive new stock to ship the best plants to our customers. Because if its unique hardiness, the demand for this wonderful plant is high, so order now or you could easily be disappointed later.

History and Origins of the Kleim’s Hardy Gardenia

Gardenias have been a part of Southern gardens for over 250 years, when plants were brought to Charleston, South Carolina from their natural home in China. Their name is American too, because the botanist John Ellis had the plant named after his friend and fellow naturalist Dr. Alexander Garden, who had a medical practice in Charleston and grew the plant as early as 1761. The gardenia (gardenia jasminoides), is also called the Cape Jasmine, and it grows wild from India into Vietnam and southern China, as well as in Japan. The Chinese people have grown these plants for a thousand years, to enjoy their fragrance and beauty.

However, these plants are usually only hardy to zone 8, so if you live in colder areas you cannot have their delicious fragrance wafting across your garden. Now there is an answer for those who live as far north as Virginia and Delaware, with Kleim’s Hardy Gardenia. This plant was discovered by Don Kleim of the Henderson Experimental Garden in California. He introduced it specifically for colder areas, and it is a real favorite with gardenia lovers in colder parts of the country. Even if your garden is too cold in winter for this variety, you can grow it in a container and bring it into a porch or cold room during the coldest weather, and grow it outdoors for the rest of the year.

Kleim’s Hardy Gardenia is a special selection of the ordinary gardenia, so it must be propagated in the correct way to preserve its hardiness. Our bushes are grown from branch cuttings taken directly from correctly-identified plants. Each one is always identical to the original. These take longer to produce, and cheaper gardenias will only be a disappointment, as they will not be this very special variety.

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Kleim’s Hardy Gardenia

Gardenia jasminoides 'Kleim's Hardy'

12 Reviews