Daphne x transatlantica 'SUMMER ICE'

Daphne x transatlantica
Daphne x transatlantica 'SUMMER ICE'
SIZE/TYPE small shrub
 medium-sized shrub
LEAVES semi-deciduous broadleaf
COLOUR OF LEAVES varigated:green and yellow
FLOWERS less showy but noticeable
BLOOMING TIME June - September
LOCATION full sun
SOIL TYPE any (acidic to alkaline)
SOIL MOISTURE REQUIREMENTS evenly moist (dislikes drought)
USDA zone (lowest) 6   (down to -23°C)
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
náhled fotonáhled fotonáhled foto
Daphne is a large genus of about 50 species. They are deciduous or evergreen, and commonly renowned for their very fragrant flowers. Hybrid daphne transatlantica is a result of crossing two species of formerly European origin (d.caucasica and d.collina) but the plants used for cross pollination were cultivated in the USA. There were selected those with reliably evergreen or at least semi-evergreen foliage.

Summer Ice is a variegated form of hybrid daphne caucasica found by Bob Tichnor of Oregon State University’s North Willamette Research and Extension Centre in Oregon, USA. The source does not say whether the plant is a mutation of unnamed hybrids or an existing variety Jim’s Pride with green foliage. From late spring until the last sunny and warm days of summer it produces small, tubular flowers, almost white inside, and pink to pale lilac outside. They have an intoxicating perfume, sweet and strong that you simply must have one in your garden. Leaves are narrowly elliptic, 3-5 cm long, slightly glossy, medium to dark green with a thin and very elegant creamy white to pale banana yellow rim. They are semi-evergreen or evergreen in warm areas and mild winters.

Summer Ice a fuss-free shrub which is something you cannot say about every daphne. It may seem to grow slowly but it bushes out quickly and you will be surprised what growth it can make in a couple of years. Left to its own devices it forms a handsome, dome-shaped shrub, almost one meter wide and tall. It needs no pruning or trimming for a nice shape, but it can take light pruning in late winter or early spring. Never prune too hard – trim only branches with leaves. The entire plant is toxic.

Daphne is usually slow growing, difficult to propagate, and detests transplanting. Hence its higher price on garden centre shelves. Yet once established it makes a beautiful shrub you will admire for many years. It naturally grows in sharply drained soil which is rather dry, yet not as dry as a xeriscape, which makes it an ideal rocky plant. Drainage is essential to keep it alive though Summer Ice will be quite happy in a normal garden soil of any pH. Keep it moist only for a few months after transplanting. Then do not water it ever again. It does not grow in pots. Do not fertilize but use soil fungi (mycorrhiza). Hardiness has so far been tested and proved to -24°C (USDA zone 6) but is expected to be a little stronger with some leaf drop.

Last update 30-06-2020

Daphne x transatlantica
Daphne x transatlantica
  • 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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