Quercus petraea 'Ryan' is the scientific name for the hybrids between Q. petraea and Q. robur. 'Ryan' is a moderately strong-growing tree with a broad pyramidal crown. This is also one of the main differences from the species Q. petraea and Q. robur, which both have a round to very wide crown. 'Ryan' forms a good continuous central branch and fairly ascending upright supporting branches, giving the crown its regular shape. The leaves are oval to inverted ovoid and regularly lobed. It is dark green and remains green longer than Q. petraea and Q. robur in autumn, before (often) withering on the tree in winter. The leaves seem better mildew resistant.
'Ryan' was found by nursery Van Tienen-Van der Hulst of Mill. The tree originated as a seedling of Q. ×rosacea 'Columna' and was introduced in 2005. Its narrower form makes 'Ryan' more suitable as avenue tree in greenbelts and parks. Hardiness zone 5.
устойчив к морозам, зона 1 - 6, cустойчив к ветру, устойчив к соли для улиц
Применение
аллеи и широкие улицы, промышленные зоны
Форма
штамбовое дерево
Происхождение
Tree nursery Van Tienen-Van der Hulst, Mill, Netherlands, 2005
штамбовое деревоизвестковые почвысуглинокпесчаные почвынеустойчив к мощениюустойчив к соли для улицустойчив к морозам (зона 1 - 6)устойчив к ветруширокая конусообразная форма3 высота: менее 6 метровкрона средней плотностизеленыйжелто-зеленыйсреднерастущийнеядовитый (обычно)
Quercus petraea 'Ryan' can eventually reach a height of 25-30 m, depending on the site and climate conditions.
Quercus petraea 'Ryan' is среднерастущий and can eventually reach a height of 25-30 m, depending on the site and climate conditions.
The right time to plant Quercus petraea 'Ryan' is during the dormancy period. In Western Europe, Quercus petraea 'Ryan' with root balls can generally be planted from mid-November to late April, although this depends strongly on the climatic conditions and the species of tree.