Cornus kousa 'HEART THROB'®

Cornus kousa
Cornus kousa 'HEART THROB'®
Japanese dogwood
SIZE/TYPE taller shrub
USUAL HEIGHT 2-4m
USUAL WIDTH 2-4m
LEAVES deciduous broadleaf
COLOUR OF LEAVES green
FLOWERS showy
COLOUR OF FLOWERS pink
BLOOMING TIME June - July
LOCATION full to partial sun
SOIL TYPE acidic (peaty)
SOIL MOISTURE REQUIREMENTS evenly moist (dislikes drought)
USDA zone (lowest) 5   (down to -29°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 Deciduous broadleaf
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Japanese dogwoods are very popular shrubs in our climate because they have unusual flowers and habit, and are fully hardy here.

In only 1995 James Schmidt from Oregon, USA, patented his version of Japanese dogwood named "Heart Throb"® with bright pink flowers. Botanically, they are flowers bracts, while flowers are inconspicuous, very small and form a tiny sphere in the middle of the four bracts. Since the flower bracts are in fact leaves the “flowering” in this case begins at the end of spring when the plant is fully leaved and lasts for as long as 8 weeks before the bracts fade away.

The bracts colour is light pink to bright rosy-pink. It depends on how well the plant is established (how long in a location), the soil quality, and if exposed to full sun. Older plants bear more colourful “flowers” than freshly transplanted specimens.


Pointed leaves are deciduous, ovate, dark green and slightly drooping. The best show begins in early autumn when they turn to deep orange and bright red and purple.

Every dogwood likes acidic soil, rich in organic material, and always moist. Some gardeners advise planting it in semi-shade to reduce summer sunlight but we do not recommend that. Plant it in full sun and mulch the roots well. In dry spells provide extra watering and thus you can be sure your dogwood will flower profusely and will be richer and healthier. Use of selective fertilizers supporting flowering and leaf colour is advised. Fully hardy to about -29°C (USDA zone 5).

Last update 29-09-2009
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Cornus kousa
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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