Alders
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Few other trees offer such interesting winter features as the snake-bark maples, but the autumn foliage colours should not be overlooked either, as they can compete with those of an of the better known stars of autumn. These acers must be planted in the right soil if later problems are to be avoided.
The species of real quality, Weigela florida, like so many other worthy plants, comes from China. The flowers are rose pink outside and like pale apple blossom within and they resemble a well-proportioned digitalis. I do not approve of the variety variegata, as I feel it reduces the dignity of the species, but I am very much in the minority in this respect. At 4 ft. it is 18 in. shorter than the type with pale pink flowers and leaves margined cream.
It is used as individual specimen trees for winter stem effect or for group planting; interesting feature when grown on a trunk or as a low-branching shrub. It propagate by seed or by commercial layering or grafting. Its varieties includes A. capillipes bark purple-red to coral-red when young ageing- to purple with white veining; A. griseunt 7 not truly a snake-bark maple but has very attractive mahogany -brown winter stems; A. grosseri var. hersii (Hers’s maple); green to grey-green marbled bark; A. ponsylvanicum (moosewood, striped maple) bright green young shoots, ageing to grey-green with white-striped veining; A. rufinerve - white-striped winter bark The diversity and range of forms of chestnut are not always appreciated. The coloured flowers and the attractive summer and autumn foliage contribute to an interesting, if very. large tree. while in autumn the fruits of Aesculus hippocastaman are collected by children as conkers.
Some are recent introductions while others are already widely acclaimed. Abel Carriere is large flowered with bright rose-carmine flowers, flecked gold at the throat. Partial shade helps the colour to hold over a longer period.
It survives in all types, except extremely alkaline; requires high levels of organic material. It requires full sun to light shade. It is bushy, moderately slow, attractive waiter stems. It has evergreen, dark green leaves with paler undersides and purple shading and veining. It has pure white or pink-tinged, waxy, cup-shaped, pendent flowers in autumn, followed a year later by yellow- red, strawberry-like fruit. It is used as a free-standing specimen shrub and, eventually, a small tree. It propagate from seed or semi-ripe cuttings taken in early summer.
In the variety lavallei the crimson flowers are relieved by white stamens, while styriaca blossoms deep rose in bud opening to soft pink: Pruning on all varieties consists of cutting back each flowering shoot as the blossoms fade to within three strong buds of the base. Propagation is by semi-hardwood cuttings 4 to 5 in. long inserted in sharp sand.
