Gardenia jasminoides 'KLEIM'S HARDY'

Gardenia jasminoides
Gardenia jasminoides 'KLEIM'S HARDY'
gardenia
SIZE/TYPE medium-sized shrub
USUAL HEIGHT 0.3-0.8m
USUAL WIDTH 0.5-1m
LEAVES evergreen broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS white
BLOOMING TIME May - July
LOCATION full to partial sun
USDA zone (lowest) 7   (down to -18°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Evergreen broadleaf
Summer blooms
Rarities
Exotics

Gardenia is a well-known indoor plant with fantastic fragrance. However, in 1990´s a few breeders came with selections that were supposed to grow happily outdoors, too. Among those Kleim’s Hardy was one of the first truly successful attempts.

Kleim’s Hardy is a small, slow growing evergreen shrub that can take winters up to zone 7. Its flowers are 3-4 cm across, creamy white with yellowish centres, heavily scented with the typical jasmine-like fragrance. It blooms from end spring until early or mid summer. The ovate leaves are deep green and highly glossy and the plant can easily be mistaken for a Japanese azalea when not blooming. Pruning is usually not needed but can be done after flowering.

For healthy growth, deep green foliage and reliable flowering without dropping of flower buds it absolutely needs acid soil (pH of about 4.3-5.0), always moist but never too wet = must be well-drained. Grow it in filtered sunlight or part shade. It can take full sun if you do not forget to water it on hot and dry days of summer. Tap water can make yellowing leaves, use rainwater if possible. A slow-release fertilizer is highly recommended plus a few doses of sequestrene (iron solution) during growing season. Keep it mulched at all times. Hardy to about -17°C (USDA zone 7).

Last update 18-02-2010; 07-02-2019
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GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
LARGE PLANTS over 150 cmspecimens, screening and hedging shrubs

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