Continue to plant bare-root
deciduous hedging plants and trees. Stakes should be put in place before
the rootball to avoid damage to the roots.
Plant roses, but avoid areas where roses were previously grown as
this can lead to problems with replant diseases.
Move established deciduous trees and shrubs, provided the ground is
not frozen or waterlogged.
Check tree ties and stakes. Replace, tighten or slacken them where
necessary.
Firm back newly planted trees and shrubs if they have been lifted by
frost heave or strong winds.
Protect newly planted trees, hedges and shrubs from cold winds and
frosts, which can loosen and lift the roots. Gently re-firm them in if
you notice this problem, and erect a temporary netting windbreak if
there is no natural shelter. Thick dry mulches will protect the roots
from cold, and branches can be covered with fleece, or even packed with
dry straw and then covered with fleece, for tender plants. A wooden
frame with clear polythene stretched over it does a similar job for
evergreens without blocking the light, but don’t let the polythene touch
the leaves, as condensation could freeze or cause rots.
Packing the branches of tender deciduous trees and shrubs with straw
or bracken, and securing this with fleece and ties, will protect them
from frost.
Remove weeds from around the bases of young trees.
Take hardwood cuttings of ornamental shrubs such as
Cornus,
Salix,
Forsythia,
Weigela,
Escallonia,
Rosa,
Ribes,
Chaenomeles and
Elaeagnus. Many deciduous
climbers can also be propagated in this way (e.g.
Fallopia and
Lonicera).
Check hardwood cuttings taken last year. They may need planting or
potting on.
Seeds of berrying trees and shrubs can still be sown - but be quick,
as they need a period of frost to break their dormancy. Examples are
Sorbus,
Cotoneaster and
Pernettya.
If there is snow in your area, then you may need to brush it off the
branches of conifers, climbers and light-limbed shrubs and trees. Heavy
snowfall can splay branches, break limbs and spoil the shape of the
tree.
Pruning and renovation of many deciduous trees, shrubs and hedges can
be carried out from now throughout the dormant season. It is easier to
see what you are doing when the branches have no leaves. Suitable
examples are: Fagus (Beech),
Corylus (Hazel), and also roses.
Exceptions are evergreens and tender plants (best left until spring),
and Prunus species (e.g.
ornamental cherries, plums and almonds), as these are vulnerable to
silver leaf when pruned in autumn or winter.
If your trees are too large for you to manage the pruning alone, then
you may need a tree surgeon. Otherwise take care not to damage the tree
when sawing off thicker branches.
Prune Wisteria - cut back the
sideshoots shortened by summer pruning to two or three buds. Avoid
cutting off flower buds.
Tie wall shrubs and climbers onto their supports to protect them from
wind damage.
Ornamental vines, ivy, Virginia creeper and Boston ivy can be cut
back now – it’s a good idea to keep them away from windows, doors,
gutters and roof tiles.
Take note of the most colourful dogwoods (Cornus),
Salix and white-stemmed
Rubus shrubs when visiting
gardens open to the public, or in garden centres, and consider planting
them yourself for a winter display.
Pest & disease watch
Put rabbit guards around newly planted trees and shrubs to protect
the bark from rabbit damage.
Inspect sick looking box and holly trees for signs of blight.
Phytophthora root rots can
cause dieback on mature trees and shrubs. Wet winter weather and poorly
drained soils are likely to encourage this problem on susceptible woody
plants.
Coral spot is often noticed once the leaves have fallen from
deciduous hedges, shrubs and trees. This problem can be connected with
poor ventilation and congested, un-pruned twiggy growth (as found inside
clipped hedges).
Bracket fungus on trees is visible at this time of year. If the tree
is in poor health it is worth calling in a tree surgeon for a
professional opinion.
Check for damage or cankers on deciduous trees while stems and trunks
are readily visible. Prune out torn or damaged branches to prevent
disease infection.