HIBISCUS syriacus ´Helene´
 
HIBISCUS syriacus ´Helene´
 
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HIBISCUS syriacus
´Helene´

Tree Hollyhock ´Helene´
thrives in full sun label Biene
Quality HEIGHT/ WIDTH BUNCH / CARTON PIECE FROM 250 FROM 2500 ORDER QUANTITY
Quality 2j.v.St. P9 0/1/1 HEIGHT/ WIDTH BUNCH / CARTON 25 PIECE €3.40 FROM 250 €2.72 FROM 2500 €2.45 ORDER QUANTITY
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A selection from the U.S. National Arboretum, Washington (a sister seedling of ´Diana´) with... more
HIBISCUS syriacus ´Helene´

A selection from the U.S. National Arboretum, Washington (a sister seedling of ´Diana´) with simple, large (8 to 10 cm) flowers, having dark red, large markings in throat - a striking, lovely cultivar. H, K, R, S. Zone 7a.

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Quality-legend Print Layer 1 year, rooted layer 1j.bew.Abl. -1/0 2 year, transplanted layer 2j.v.Abl. -1/1 Layer 1 year, rooted layer 1j.b
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Quality-legend

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Layer
1 year, rooted layer 1j.bew.Abl. -1/0
2 year, transplanted layer 2j.v.Abl. -1/1
Layer
1 year, rooted layer 1j.bew.Abr. -1/0
2 year, rooted layer 2j.bew.Abr. -2/0
2 year, transplanted layer 2j.v.Abr. -1/1
Runner
1 year runner 1j.Ausl. -1/0
2 year, transplanted runner 2j.v.Ausl. -1/1
Micropropagation
1 year Tissue Culture 1j.v.M. TC/1x0
2 year transplanted Tissue Culture 2j.v.M. TC/1/1
Seedling
1 year seedling 1j.S. 1/0
1 year, transplanted / pricked of seedlings 1j.pik.S. 1x0
2 year seedling 2j.S. 2/0
2 year, undercutted seedling 2j.gestochen 2/0#
2 year, transplanted seedling 2j.v.S. 1/1
3 year, undercutted seedling 3j.gestochen 3/0#
3 year, transplanted seedling 3j.v.S. 1/2 or 2/1
4 year, transplanted seedling 4j.v.S. 1/3 or 2/2
5 year, 2x transplanted seedling 5j.2xv.S. 1/2/2 or 2/1/2
Hardwood cuttings
1 years, rooted softwood cutting 1j.bew.Sth. 0/1
2 years, rooted softwood cutting 2j.bew.Sth. 0/2
Softwood cutting
1 year, rooted softwood cutting 1j.bew.St. 0/1/0
1 year, transplanted softwood cutting 1j.v.St. 0/1x0
2 year, rooted softwood cutting 2j.bew.St. 0/2/0
2 year, transplanted softwood cutting 2j.v.St. 0/1/1
3 year, transplanted softwood cutting 3j.v.St. 0/1/2 or 0/2/1
4 year, transplanted softwood cutting 4j.v.St. 0/1/3 or 0/3/1
5 year, transplanted softwood cutting 5j.v.St. 0/2/3
5 year, 2x transplanted softwood cutting 5j.2xv.St. 0/1/2/2 or 0/2/1/2
Graft
1 year graft 1j.Vg. x/1/0
2 year graft 2j.Vg. x/2/0
2 year, transplanted graft 2j.v.Vg. x/1/1
3 year graft 3j.Vg. x/3/0
3 year, transplanted graft 3j.v.Vg. x/1/2 or x/2/1
Root cutting
1 year, rooted root cutting 1j.bew.Ws. -1/0
2 year, transplanted root cutting 2j.v.Ws. -1/1
Legend thrives in full sun thrives in partial shade thrives in shade label is provided (in the case of protected varieties) or available
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Legend

icon-sonnig thrives in full sun
icon-halbschattig thrives in partial shade
icon-schattig thrives in shade
icon-etikett5e6f48d33055a label is provided (in the case of protected varieties) or available for order 
icon-neu5e6f48d379a75 New
icon-bee bee pasture/insect food
® registrated Trademark
protected variety
AGN Award of Garten Merit
B ground cover
D drought resistance
*** excellent value
** very good value
* good value
H hedge plant
K poted plant
P pot
MP Tray
R smog resistant
S specimen plant
St town plant
Z dwarf form
Winter hardiness zones Zone tminJ in °C 5b -26,0 to -23,5 6a -23,3 to -20,6 6b -20,5 to -17,8 7a -17,7 to -15,0 7b -14,9 to -12,3 8a
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Winter hardiness zones

winterhaertezonen

Zone tminJ in °C
5b -26,0 to -23,5
6a -23,3 to -20,6
6b -20,5 to -17,8
7a -17,7 to -15,0
7b -14,9 to -12,3
8a -12,2 to -9,5
8b -9,4 to -6,7

Winter hardiness zones for plants in Europe

The map of hardiness zones for plants in Europe was developed by W. Heinz and D. Schreiber (Released in the German Dendrological Society No. 75) and first published by Bärtels, A., ”Gartengehölze“ for the publishing house Eugen Ulmer, Stuttgart. On our website you will find the hardiness zones of each plant at the end of the description.

Basis

Basis of the hardiness zones are the annual average minima of the air temperature.

Temperature ranges

Temperature ranges for Europe are 11 zones with temperatures declared by 5,5˚C. In Central Europe only the zone 5 to 8 are occurring. Their division into half-zones takes into account the relatively small scaled Central European climate.

Mapping

The mapping in a hardiness zone gives you evidence of the coldest thrive mostly also in the warmer zones. It can be assumed that trees and shrubs have a survival rate of 80 percent in their specified hardiness zone, in the next following warmer zone the survival rate is increasing significantly.

Local climate

Each zone of the map shows the average hardiness of the winter. Within each zone are many local climatic variations. Close to buildings, in particular the urban development, as well as a protected southward hillside, creates much milder conditions. However, hollows, valleys and northern hillsides are less favorable and can get the effect of at least a following zone.

Rivers

In valleys there are relatively mild sections, if the water will be not frozen because of industry influence, heated streams or fast flowing rivers. This heats up the air in cold winters and generates fog, which reduces the further cooling by radiation. Such local climate deviations have mostly the effect of a half zone level.

Extreme

In extremely cold winters, where the average annual minimum of the air temperature drops significantly, more sensitive trees are endangered. Through the choice of right local climate locations and winter protection frost damage can be prevented or reduced.

Frost

Frost hardiness is a hereditary property, but within the genetic variability it is shaped by the locational factors. That includes special soil conditions and the supply of nutrients as well as the weather development in the autumn and winter.

Weather history

A dry autumn encourages an early stop of growing and the ripe off. A warm and very rainy autumn, especially if it lasts long causes the opposite. A gradual increase of the cold stimulates the winter hardiness. An early first night of frost stops the growth and serves the winter-hardiness. But deeper freezing temperatures are very dangerous in this period and damages can be seen only in the following spring.

Continental climate

In continental areas the woody plants get during the vegetation period a higher sum of heat as in maritime Areas. The plants are ripe off more safe, what develop their winter hardiness.

Temperature change

Continental climate is characterized by greater temperature extremes; where native plants are therefore quite frost hardy. The same species are losing this property in the maritime climate, where they tolerate far less deep temperatures. They are especially sensitive for a multiple change between frost and warm periods.

Minimum order value Minimum order: 500 EurosDelivery in full units only.
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Minimum order value

Minimum order: 500 Euros
Delivery in full units only.

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Shipping Cotst

Delivery from the nursery plus packaging and freight charges.

Ordering information New and popular items are quickly sold out! Your desired article was sold out in the past and in the short term doesn't availabl
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Ordering information

New and popular items are quickly sold out!

Your desired article was sold out in the past and in the short term doesn't available? Then note our ordering tips:

  • Order in time!
    Pre-order early for the upcoming season.
  • Request delivery overview!
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For more information or a consultation call us + 49 (0) 4106-4011 or write an e-mail to info@koju.de

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