Viburnum opulus "Roseum"
Viburnum opulus "Sterile"
guelder rose "Roseum"
guelder rose "Sterile"
Viburnum opulus "Roseum" Description guelder rose "Roseum" Description Large, upright, broad deciduous shrub (H 3-4 m, W 3-4 m). Crown rounded to dome-shaped. Branches widely spreading, slightly hanging in a distinctive, arching way. Leaves broadly egg-shaped, palmate, 3-(5)-lobed (10 cm), smooth, dark green, autumn colour dark violet-red. Flowers in dense, round inflorescence (5-6 cm), simple (1-2 cm), greenish to snow white. Flowering period: May-June, very freely flowering. Fruits absent. Attracts butterflies and bees. Requires deep, always moderately moist soils, otherwise easy to grow.
Decidious have woody stems (i. e. tree trunk and branches) and are also called woody plants or trees. Leaves are normally broad, soft and thin.
Woody plant, normally branched at the ground level into several side stems, usually lacks of a dominant stem. Tree top can be of different shapes, dense or thin, symetric or uneven. Most shrubs reach a height of 1 to 2 metres, but some can grow much higher (up to 8 m); some can grow into very low or carpet-like forms.
The plant develops new leaves or needles every spring, which dropp off in autumn. Herbaceous plants can die completely in above ground section and grow back in the spring.
Plant can in otherwise appropriate environment survive cold down to - 23 °C.
These plants grow well in sun or in partial shade. Usually they tolerate more sun and heat if given enough moisture; in partial or light shade they need less moisture.
Moist soil usually contain morefine clay parts and less sand, more humus and organic materials, they are somewhat heavier, but not hard; water does not run away quickly but stays among soil particles and is long available to plants. There is no stagnant water, soil is airy enough. Drought occurs rarely on such positions. Plants are given more or less permanent, moderate moisture.
Among described plants in this category we marked those, which are particulary resistant (to various environmental conditions), do not require much maintanance and thereby suitable fot planting in public areas.
Leaves or needles of many deciduos plants change colour in autumn before falling mostly to yellow, orange and red shades. Distinctive autumn red or similar colouration may also appear in some evergreen plants, which leaves/needels do not fall off in autumn. Autumn coloration depends on general condition of a plant, maintanance, weather and site. Usually leaves colour more intensely if dry autumn and if differences between day and night temperatures are greater, as well as on dry, sandy soils with less nitrogen. Among grown ornamental plants there are numerous varieties with especially intense or diverse autumn colour than by the basic species.